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Miesięcznik ISSN 0033-2097, e-ISSN 2449-9544 - rok powstania: 1919
Czasopismo Stowarzyszenia Elektryków Polskich (SEP)

Hybrid approach to energy efficient clustering for heterogeneous wireless sensor network using biogeography based optimization and k-means
(ang. Hybrydowe podejście do efektywnego energetycznie tworzenia klastrów dla heterogenicznej sieci czujników bezprzewodowych z wykorzystaniem optymalizacji opartej na biogeografii i k-średnich)

DOI:10.15199/48.2019.04.24
Shashi BHUSHAN Svitlana G. ANTOSHCHUK Pavlo O. TESLENKO Vasyl V. KUZMENKO Waldemar WÓJCIK Orken MAMYRBAEV Ulzhalgas ZHUNISSOVA 
Streszczenie
The paper presents the proposed protocol a hybrid approach is applied for clustering of sensor networks combining BBO and K-means algorithm. The performance of the protocol is compared with SEP, IHCR and ERP in terms of stability period, network life time, residual energy and throughput. The simulation results show that the proposed protocol named as KBBO has improved the performance of these parameters significantly.
Słowa kluczowe: clustering, network life time, stability period, optimization
Abstract
W pracy przedstawiono protokół, w którym stosuje się podejście hybrydowe do grupowania sieci czujników łączących algorytm BBO i K-średnich. Jego wydajność jest porównywana z SEP, IHCR i ERP pod względem okresu stabilności, żywotności sieci, energii resztkowej I przepustowości. Wyniki symulacji pokazują, że prezentowany protokół nazwany KBBO znacznie poprawił wydajność tych parametrów.
Keywords: grupowanie, żywotność sieci, okres stabilności, optymalizacja
A WSN consists of a large number of sensor nodes which can sense physical properties of environment such as humidity, temperature, sound, etc. , collect sensed data and transmit it to the base station through a wireless link. Sensor nodes are characterized by limited energy, low processing capability, low communication range and low memory capacity. Sensor nodes have become more smarter and cheaper in recent days due to development in Micro-Electro-Mechanical Systems (MEMS) [1]. Due to availability of smarter and cheaper sensors, WSN has received wide acceptability with potential application in a large domains: environment monitoring, disaster warning system, health system and military application [2]. Unlike a traditional network, the major research challenge in WSN is how to maximize the network lifetime by reducing energy consumption of the sensor nodes. Clustering is a key technique to reduce energy consumption and extend the lifetime of the network. Besides reduction in energy consumption and extending network life time , clustering technique has many other advantages: scalability, latency reduction, collision avoidance, less overhead and load balancing [3] .Selection of cluster heads (CHs) in energy efficient clustering mechanisms depends upon several factors: residual energy of a node, initial energy, average energy of a network and energy consumption of the node [4]. Clustering is also a key technique for implementing energy efficient routing in WSN. LEACH [5], SEP [6], HEED [7] and PEGASIS [8] are some prominent clustering based routing protocols. The probabilistic models are used to select CHs in these protocols which may result in random selection of CHs irrespective of distribution of nodes and the residual energy of the network. In recent days a number of meta-heuristic techniques such as GA [9], PSO [10] and BBO [11] have been applied in design of energy efficient clustering based routing protocols for WSN. I [...]

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Wysokosprawne przetwarzanie energii elektrycznej i mechanicznej należy współcześnie do najistotniejszych zadań. Troska o środowisko naturalne, rosnące ceny energii i koszty obsługi wymuszają poszukiwanie rozwiązań, wykazujących zbliżone parametry transformacji energii przy jednocześnie wysokiej sprawności i niskich kosztach eksploatacji. Jednym z rozwiązań spełniających ww. wymagania jest współosiowa przekładnia magnetyczna (ang. magnetic gear - MG). Koncepcja tego przetwornika została szczegółowo opisana w pracach [1, 2, 5-7]. Bezstykowego przenoszenie momentu, za pomocą pola magnetycznego, wyklucza mechaniczne zużycie współpracujących elementów, zmęczenie materiału, konieczność smarowania oraz znacząco redukuje poziom drgań i hałasu, a ostatecznie konieczność wykonywania okresowych przeglądów [1-3, 5-8, 10]. Zasada działania przekładni w pewnym aspekcie, zbliżona jest do maszyny synchronicznej. Tak jak w maszynie synchronicznej również przekładnia magnetyczna wymaga synchronizacji. O ile proces ten w trakcie łagodnego rozruchu następuje samoczynnie (tak jak zastosowanie falownika do rozruchu maszyn synchronicznych), wysoka dynamika dotycząca zmian momentu i prędkości w układzie napędowym jest istotnym ograniczeniem możliwości zastosowania magnetycznej transformacji momentu. Relatywnie niska wartość współczynnika sztywności przekładni magnetycznej niejednokrotnie może prowadzić do powstawania słabo tłumionych oscylacji, do utraty synchronizmu i zatrzymania układu [3, 4]. Dla niektórych aplikacji, takie naturalne zabezpieczenie przed przeciążeniem stanowi istotną zaletę, jednak w innych przypadkach może spowodować utratę kontroli nad układem napędowym, a w skrajnym przypadku jego zniszczenie [3, 4]. Jednym ze sposobów na ograniczenie tego niekorzystnego zjawiska jest zaproponowane w pracy [4] wprowadzenie współczynników korekcyjnych. Inne rozwiązanie opisane w pracach [3, 10, 11, 12] bazuje na zastosowaniu specjalizowan więcej »

Analogue part of multichannel highly productive analog-digital system on converters and switches of current - DOI:10.15199/48.2019.04.20
Olexiy D. AZAROV Maxim R. OBERTYUKH Patryk PANAS Piotr KISAŁA Gulzhan KASHAGANOVA Saltanat AMIRGALIYEVA 
Analog-to-digital systems (ADS) are used to solve a wide class of problems in the measurement, signal recording and processing technique. Depending on the application area, they are subject to various requirements for accuracy, speed and productivity. For example, in measuring systems, a high absolute accuracy of the analog-to-digital conversion is sometimes required, and in the registration systems, a low linearity error is sufficient. Similarly, the primary analog signal in many sensors is converted to digital output signal using electronic circuits for signal processing and conditioning, incorporated into the sensor (i.e. the temperature and humidity sensors [1]) Regarding the same requirements for speed, they are determined by the spectra of the input analog signals and the possibility of their reproduction with minimal losses. In a number of cases, it is advisable to use such a complex characteristic as productivity. The basic unit of these systems is an analog-to-digital converter (ADC). Currently, there are basically three types of ADCs [2]: sigma-delta, pipelined and successive approximation. It should be noted that the first have high resolution, but their speed is relatively small [3, 4]. The highest speed is characterized by pipelined converters, but they have a sufficiently high power consumption and circuit complexity. Successive approximation ADCs have a significant productivity range and it can be further increased by introducing, for example, a weight redundancy [5, 6]. Relevance Quantitatively, the performance of the ADC can be estimated by analogy with digital computing devices [7], as the product of the display range (the length of the bit grid) by the frequency of the operations performed. For the ADC (part of the ADS), this will correspondingly be the product of the resolution of the analog-to-digital conversion (the number of conversion quanta) to the maximum frequency of execution of the conversions więcej »

Analysis of hydraulic vibration drive machine for vibration abrasive processing - DOI:10.15199/48.2019.04.16
Olexander D. MANZHILEVSKYY Alla P. VINNICHUK  Andrzej SMOLARZ Assel MUSSABEKOVA Samat SUNDETOV 
Equipment for vibration abrasive processing (VAP) is used in machine-building for performing, for example, cleaning of cast, forged, punched and heat-treated billets, parts and semi-finished products of various purposes and a wide range of products (see next chapter), [1]. Cleaning the workpieces in many cases precedes the implementation of further technological operations and plays an important role in the overall process of manufacturing parts. Such processes and machines and their implementation are well known in the machine-building industry. But most of them have a significant drawback - relatively small performance. Therefore, the problem of finding ways to increase the productivity of these machines is an important problem. Analysis of literary data and problem statement There are many types of VAP, among the most effective are: Spindle vibration abrasive treatment (fig. 1) [2] is the process of surface treatment of parts that come in contact with a vibrating abrasive working environment. Such processing is finished and does not imply changes in the accuracy of the sizes. Treatment is carried out by removing the smallest particles of the metal, its oxides, or the plastic deformation of the surface to be treated as a result of relative slip and collision with a sufficiently high speed of the treated surface and particles of the working medium. Details are given the rotation (by attaching it to the spindle of the machine) at a speed of 0.5 -1 to 7-15 m/s. The working environment is exposed to directed vibrations with a frequency of 1500 - 2000 min-1 and an amplitude of 1 - 5 mm (fig. 1) [1]. Chemically and surface-active substances can be used to intensify the processing process. The large working space, where the working environment, allows the processing of parts in the entire volume of the camera, while excluding the need for a rigid connection of the treated surface with the processing environment, and, in addit więcej »

Assessment of information support quality by "friend or foe" identification systems - DOI:10.15199/48.2019.04.22
Iryna V. SVYD Andrii I. OBOD Ganna E. ZAVOLODKO Iryna M. MELNYCHUK Waldemar WÓJCIK Sandugash ORAZALIEVA Gulzat ZIYATBEKOVA 
The system of airspace control provides to a large extent the State security and air traffic safety, which determines in itself the level of requirements to protection of information processes of its functioning. Modern systems for monitoring airspace solve, as is known, the following main objectives: - conducting continuous reconnaissance of the air space; - assessment of the air situation and identification of violations of the air space use order; - delivering the results of radar data to the government, administrative, military management and air traffic control management. Reconnaissance of the air space is realized with the surveillance systems whose main task is to give answers: where is a flying object (FO) and who is it. The systems of primary [1-3] and secondary [2-3] surveillance radar give jointly an answer to these questions. The primary radar systems answer the question “where" and the secondary surveillance radar (SSR) systems i.e. the systems of “friend or foe" identification (IFF), answer the question “who". The quality of these two surveillance systems information, defined by the interference immunity of the discussed surveillance systems, is determined, to a large extent, by the quality of the information support of the airspace control system. The immunity of the primary radar systems is considered adequately in the existing sources of information, but there is a gap in consideration of the IFF interference immunity. So, the problem of reply signals (RS) processing was raised in [4-6]. However, the SSR are twochannel systems: they contain the interrogation channel and the response channel. This fact should be taken into account when assessing the probability of information support with these surveillance systems[7,8]. The aim of the work is to assess the quality of information support of the airspace control system using the systems of “Friend-or- Foe" identification. The main więcej »

Basic principles of technological object's touch registration during machining materials - DOI:10.15199/48.2019.04.19
Gregory S. TYMCHYK Volodymyr I. SKYTSIOUK Tatiana R. KLOTCHKO Andrzej KOTYRA Azat TURGUNBEKOV Saule SMAILOVA 
The problem of increasing the efficiency of processing processes and improving the quality of products can be solved successfully by the creation and implementation of methods and systems for controlling the quality of production processes. The implementation of such methods is especially important for instrument making, where in many cases the requirements for improving the accuracy of processing are of paramount importance. Analyzing the factors influencing the quality of the final product of mechanical processing [1, 2, 3], it should be noted that this is a set of indicators produced by the consumer market of products, formulated by quality standards.The rather superficial view of these indicators is to see the impact of equipment wear on their variations over time. The fluidity of the machine's parameters is especially felt on the exact parameters of the parts manufactured. Hence, the quality parameter most exposed is the size of individual fragments of the part. The more precisely it is necessary to perform this or that part size, the greater the requirements for the accuracy of the machine. But due to the rapid wear and tear of the machine tool there are possibilities of violation of the above indicators. The main factor affecting this indicator is obvious hysteresis in the movement of the forward and reverse coordinates (duality - clearance). Analyzing the work of modern CNC-machines [4, 5, 6], it is necessary to notice the fact that despite the high precision of the motion of the working surface and the tool, the machine as a forming device is technologically unlocked in its circle. The movement of the working surfaces of the machine tool and the cutting tool can occur even without the presence of a detail on the workdesktop. Such a lack of feedback leaves the technological information system in relation to the accuracy of the size be performed, the wear of the tool, the fidelity of the chosen mode of operation, th więcej »

Coordination of serial-parallel manufacturing processes of milk production - DOI:10.15199/48.2019.04.31
Marcia M. BAYAS Volodymyr M. DUBOVOI Ronald H. ROVIRA Sergii V. PAVLOV Żalkin GRĄDZ Saule SMAILOVA Baituma BISSARINOV 
The use of spatially distributed technological objects in industry and production systems is an ever-increasing trend. One of the first fundamental overview of distributed processes control systems was in the work of Golemanov [1]. The isolated action of these objects often leads to numerous problems and generates a high degree of uncertainty in making managerial decisions. Objects can have different goals and constraints, various parameters of productivity and efficiency, therefore to achieve a common goal it is necessary to organize their complex interaction [2-4]. The problem of decision making coordination in the control of production systems is particularly relevant. Researchers have dedicated a lot of attention to formulation of coordination control in complex systems and methods of their solutions, as evidenced by the significant number of publications that have appeared in recent decades [5-6]. In this work, we consider mainly iterative and non-iterative coordination algorithms. With the non-iterative algorithm, the result of optimal coordination is achieved through a single information exchange between levels of the control hierarchy. The disadvantage of this method is the high complexity of the calculations. In the iterative algorithm, the optimal solution is associated with multiple exchanges of information between the center and the elements. In this case, the drawback consists in a significant number of iterations and, consequently, a long calculation time. The disadvantage of this method is the high complexity of the calculations. In the iterative algorithm, the optimal solution is associated with multiple exchanges of information between the center and the elements. In this case, the drawback consists in a significant number of iterations and, consequently, a long calculation time. A series of works carried out with the participation of authors [7-9] is devoted to the tasks of model development and coordinat więcej »

CPC - Based Reactive Balancing of Linear Loads in Four-Wire Supply Systems with Nonsinusoidal Voltage - DOI:10.15199/48.2019.04.01
Leszek S. CZARNECKI 
Introduction Distribution systems in manufacturing plants supply not only balanced three-phase loads, but also aggregates of single-phase loads such as lightning, instrumentation and control systems, and electrical transportation. Distribution systems that supply such unbalanced loads are built as three-phase systems with neutral, i.e., as four-wire systems. Such unbalanced loads cause asymmetry of voltages and currents in the distribution system. This asymmetry, along with the reactive power, contributes to an increase in energy loss, to equipment overloading and to the reduction of the supply quality in such a system. Consequently, a reduction of the reactive power and asymmetry in such systems is often needed. Because of the power level, compensation of the reactive and unbalanced currents in large manufacturing plants could be above the capability of switching compensators, known as “active power filters", however. Switching compensators are built of power transistors, used for shaping the compensating currents, and such transistors have relatively low switching power. Only reactive compensators can have a sufficient power for that. Balancing compensators for three-wire systems with sinusoidal voltage were first developed by Steinmetz in 1917 [1] and there is a substantial amount of reported research on such compensators design [3-4, 9]. Although some results on methods of design of compensators for four-wire systems were published [8, 10, 11, 14, 15], the development of such methods is substantially retarded. A controversy [12, 13] on how to describe the power properties of four-wire systems is the main reason for that. In the lack of such description, only optimization methods [11] could provide parameters of a compensator. Optimi-zation methods might not be appropriate for control of adap-tive reactive compensators, when the speed of control is crucial, however. Formulae that would enable direct calcula-tion więcej »

Criterion for transient behaviour in a nonlinear Duffing oscillator - DOI:10.15199/48.2019.04.36
Ryszard SZCZEBIOT Andrzej JORDAN 
From a practical point of view, to determine the duration of transient behavior in nonlinear physical systems constitutes both an important and interesting problem. Transient behaviour occurs both in mechanical systems as well as electrical and electronic ones. In stable linear systems, it is assumed that the transient process fades after a time equal to five time constants. For an autonomous system analysis a more exact assessment of the duration of transients was presented in [1]. It used a Lyapunov function to define time ttr, in which the trajectory of an autonomous system, starting from the initial state, reaches a specific area including the origin of the coordinate system. In that case, ttr≤-ϑlnV[x(ttr)]/V[x(0)], where V[x] is a Lyapunov function, while ϑ is the largest eigenvalue of a matrix determined from dependency . max( ( ) / ( )) x   V x V x . The analysis of transient behaviour in nonlinear systems is more complicated as the superposition principle cannot be used here and, as a result, transient and steady components cannot be separated. In harmonic enforcement, nonlinear systems are characterized by the occurrence of a non-sinusoidal response. In many cases, they are systems with chaotic dynamics in which transient chaos are distinguished [2, 11]. The duration of the transient behaviour depends, among others, on the choice of initial conditions and the values of the system parameters. A great number of physical phenomena are modeled by basic differential equations. For example, vibrations in electrical, electronic and mechanical systems can be analyzed using the Duffing equation [3, 4]. The system of three Lorenz equations has been used to characterize the convective movement occurring, for instance, in the Earth's atmosphere [5, 6]. Electronic oscillators with non-linear damping are described by Van der Pol's equation [7, 8]. Below, we present a brief overview of więcej »

Design of Compact Ultra-Wideband Monopole Semi-Circular Patch Antenna for 5G wireless communication networks - DOI:10.15199/48.2019.04.42
Muhammad USMAN Haitham ALSAIF Muhammad Tajammal CHUGHTAI Sajid Mehmood ASIF 
The massive mobile data requirement has increased, in last ten years, mainly due to the video content. This is due to the capability of mobile handsets supporting 4k resolution which requires the data rate of 15.4Mbps[1]. This increase is due to the increasing number of user and viewing time. This will result in an annual traffic of 296.8 excabytes(EB) by 2019[2]. Therefore, 5G communication network (IMT 2020) is the suggested solution to match this high data demand, with a capability of reaching up to data rate of 20Gbps. 5G is not only targeting enhanced mobile broadband (eMBB), but also it has diverse usage scenarios including, ultra reliable and low latency communication (URLLC) and massive machine type communication(mMTC). In order to meet with the design challenges of 5G , frontend antenna layout for base stations and mobile hand set is an intense area of research. Recently, technology of ultra-wideband has received high importance and growth in wireless communication systems due to its remarkable features. Federal Communication Commission (FCC) has allocated a frequency band ranging from 3.1 GHz to 10.6 GHz for such applications [3-8]. These systems are characterized by extreme high data rates over their wide bandwidth, low power consumptions [9-12]. Hence, designing a compact antenna with high performance in terms of operating frequency, radiation pattern, power gain, and fabrication cost remains a challenging task[13-17]. Micro strip patch antennas are widely used in ultrawideband systems due to their advantages such as low cost, simplicity, light weight, and structure size. Thus, proposed antenna is a patch semi-circular antenna fed by a micro strip line as shown in figure 1(a). Next section will present details of the antenna structure and parameters. Antenna Design Fig.1 shows the geometry structure of the proposed semi-circular monopole antenna. The entire design and parametric optimization process have been więcej »

Development of a multi frequency phase method for measuring ranges - DOI:10.15199/48.2019.04.25
Vitalii R. LYUBCHIK Olexander K. YANOVITSKY Sergii M. ZLEPKO Yulia V. SENCHISHINA Waldemar WÓJCIK Olga USSATOVA Aliya TERGEUSIZOVA 
In the field of radar sounding, impulse methods for measuring ranges are traditionally used [1,2]. These methods are clear and easy to measure. But the finite duration of the probe pulse limits the accuracy and resolution of the methods. The use of frequency methods makes it possible to improve the accuracy of measuring distances [1,2]. Phase methods for measuring range are known [1,3]. These methods allow measuring the range of only one object, but with high accuracy. Also, phase methods, however, like frequency ones, do not have a "dead zone", which allows them to have a clear advantage over pulsed methods when measuring short ranges. But in the case of frequency methods, probing signals have a wider bandwidth than in the case of phase methods. The range of sounding frequencies is strictly limited to the minimum required quantity that allows to obtain the given accuracy, which has a distinct advantage over other methods. When performing range measurements, the main task is to separate the signals reflected from each object. The developed multi-frequency phase methods allow me to separate the signals reflected from objects by analyzing the amplitude-frequency and phase-frequency characteristics of the total reflected signal, which represents the sum of the harmonic signals reflected from each object in a given frequency range [4-6]. Let us cite short results of the studies which made it possible to obtain a mathematical model on the basis of which it became possible to develop a multi frequency phase method for measuring distances to many objects [7]. Unlike time measurements, when signals reflected from each object are separated in time. In phase measurements, all harmonic signals reflected from all objects act simultaneously, and therefore, as the medium in which radio signals propagate can be considered linear systems, they are algebraically summed at each point. Method Considering a system of N objects that are sou więcej »

Development of energy-efficient vibration machines for the buiding-and-contruction industry - DOI:10.15199/48.2019.04.10
Ivan I. NAZARENKO Mykola M. RUCHYNSKYI Anatoliy T. SVIDERSKYI Iryna M. KOBYLANSKA Damian HARASIM Aliya KALIZHANOVA Ainur KOZBAKOVA 
Vibration machines are used in processes for crushing, sorting, mixing, and compaction of construction materials, as well as in other processes that are characteristic for the building-and-construction industry. Vibration machines are designed, for the most part, for operation in the mode of over-resonance vibrations of the vibration machine actuator. In the design of such vibration machines, predominantly inertial forces are considered. Notwithstanding the fact that vibration machines are rated for steady-state operation, that is, for operation in conditions without transient processes, the energy efficiency of such vibration machines is low. Consequently, such vibration machines are characterized by that their reliability is reduced, materials consumption is high, and running time required for sufficient processing of materials is increased. Additionally, to the operation of vibration machines in the mode of normal harmonic vibrations of the vibration machine actuator, it is possible to operate vibration machines in modes of resonance więcej »

Dynamical processes simulation of unbalanced vibration devices with eccentric rotor and induction electric drive - DOI:10.15199/48.2019.04.14
Vladimir M. SHATOKHIN Vladimir N. SOBOL Waldemar WÓJCIK Gali DUSKAZAEV Daniyar JARYKBASSOV 
A using of vibration technologies allows intensify production processes, improve the work quality, create materials with new properties, reduce the material and energy intensities of equipments [1]. Vibration machines on elastic supports with an eccentric rotor, unbalances and an induction electric drive have several advantages. The constructions of such mechanisms are simple, but their motion parameters can be determined only by dynamic analysis, since the devices perform oscillations [1, 2]. Additional difficulties are caused with correct description of the dynamic feature of an induction motor (IM) at transient modes and a load with oscillating character [3]. Investigations of dynamical processes simulation, parameters choice, predictions of technological qualities for devices are very significant and urgency. At present, mathematical models of vibration devices are not sufficiently developed. In the papers [4, 5], the motion equations of the simplest mechanism model are obtained at steady-state operating modes and under the assumption that a working chamber performs translational motion. However, in most cases the translational motion conditions are not met. In addition, frequent starts and stops of devices are the characteristic modes of its operations, so the calculations of transient processes are very relevant. The cheap and easy-to-use IM generates additional difficulties associated with the description of its dynamic features at transient modes and a load with oscillating character. The using of linearized static characteristics [6], or linearized differential equations [7], which approximately describe electromagnetic transient processes in electric motors, leads to a significant overestimating of the calculated torque of IM compared with the experimental one [3]. An absence of reliable mathematical models makes it difficult: a choice of motors that provide start-up of devices; a parameters determining of the w więcej »

Dynamical processes simulation of vibrational mounting devices and synthesis of their parameters - DOI:10.15199/48.2019.04.15
Vladimir M. SHATOKHIN Vladimir N. SOBOL Waldemar WÓJCIK Aisha MUSSABEKOVA Doszhon BAITUSSUPOV 
The problem of assembly automating by using of robots (manipulators) for increasing labor productivity, releasing hands, improving the work quality, as well as performing hazardous for health, physically heavy and monotonous work is actual for different industries. One of the promising directions in this problem solving is the use of uncontrolled, in particular, vibrational assembled devices. It’s using allow to abandon expensive sensors and servo drives at the assembly process even for non-axisymmetric parts without chamfers, does not impose high demands on the rigidity of the entire robot design. The assembly is as follows. The robot gripper "roughly" brings the assembling part, which is installed in the grab of the vibrational assembling device, to the connection point with another part (for example, a plunger to the plunger barrel). The assembling device is turn on, the part with the grab starts to do some spatial oscillations, and the parts are mated, even though the position of the assembling part was initially inaccurate. Spatial oscillations of the grab and parts are given by an unbalanced motor, which mounted on the assembling device. In Fig. 1 shows the assembly device with a vibrational mounting mechanism. In paper [1] mathematical models of devices for robots with low-frequency vibrations were created. Paper [2] is proposed the algorithms developments for the functioning of assembly mechanisms in shipbuilding. Paper [3] is devoted to dynamic processes simulation at starting process of vibrational mechanisms. Features of sensors and servo drive using are analyzed in paper [4], adaptive automatic grabs are considered in [5, 6]. An analysis of the design features of vibrational mounting devices is given in paper [7]. The simplest methods of parameters choosing for mechanisms are also presented there. Dynamic processes simulation in some devices with unbalanced vibro drives is devoted papers [8, 9], electroma więcej »

Electromagnetic vibratory cavitator - DOI:10.15199/48.2019.04.05
Ivan S. AFTANAZ Ivan S. AFTANAZIV Lilia I. SHEVCHUK Iryna Z. KOVAL Lesya R. STRUTYNSKA Orysia I. STROGAN Andrzej SMOLARZ Ainur ORMANBEKOVA  Kalamkas BEGALIYEVA 
In recent decades the technological processes using cavitation treatment of the liquids are finding increasing use. This is due to the specific beneficial physical and chemical effects of cavitation in the processed liquid, which they take as a result of cavitation processing of unique properties. So established that cavitation treatment able to improve the structure of ordinary tap water or natural water, modifying it from the cluster structure to monocrystalline, peculiar structure of spring water. Using cavitation greatly increases the yield of final product by extraction of plant suspensions, which contributed to its widespread use of foreign pharmacological enterprises [1,2,4]. Experimentally determine the suitability of cavitation to a quality mix heavily mixed fluids opens up bright prospects not only for its use in the manufacture of lubricating-cooling liquids in the engineering industry, and so difficult to implement for blending diesel fuel with ordinary water, whereby 10 ÷ 15% reduced its consumption in engines of internal combustion, improved operating conditions of an engines [5-7]. Especially promising for improving the ecology of the environment appeared research scientists of Lviv Polytechnic National University, convincingly proved the possibility of the effective use of cavitation for wastewater disinfection of processing industries of organic and biological contaminants. These studies offer the prospect of high-quality cavitation cleaning of waste of milk processing industries, production of beer, drinks and alcohol, as well as public pools (swimming pools, water parks etc). The harmful impact of these processing facilities on the ecology of the environment very significantly not only of the lack of highquality and low-cost technologies for treatment of waste water, but also through the very broad dissemination of these productions in almost each of the settlements. Accordingly, the contribution of these więcej »

Energooszcze˛dne i bezpieczne protokoły zwie˛kszaja˛ce ˙zywotno´s´c sieci sensorowych - DOI:10.15199/48.2019.04.35
Ewa NIEWIADOMSKA-SZYNKIEWICZ Andrzej SIKORA 
Inteligentne sensory poła˛czone siecia˛ bezprzewodowa˛ stwarzaja˛nowe moz˙liwos´ci gromadzenia i przekazywania danych. Bezprzewodowa sie´c sensorów (ang. Wireless Sensor Network — WSN) [1, 2] tworzona jest najcz˛e´sciej w trybie ad hoc, przez niewielkich rozmiarów urza˛dzenia, stanowia˛ce we˛zły sieci ge˛sto rozmieszczone na duz˙ym obszarze. Istotna˛ własnos´cia˛ odróz˙niaja˛ca˛ siec´ typu ad hoc od innych systemów stosuja˛cych transmisje˛ bezprzewodowa˛ jest zdolnos´c´ do samoorganizacji — urza˛dzenia same organizuja˛ sie˛ w siec´. Wszystkie we˛zły sieci sa˛ równoprawne i moga˛ komunikowac ´ sie˛ wzajemnie rywalizuja˛c o doste˛p do kanału radiowego. W ogólnym przypadku sieci WSN tworza˛ urza˛dzenia heterogeniczne, o ró˙znej architekturze, sprz˛etowej i programowej. Na architekture˛ we˛zła sieci WSN składaja˛ sie˛ : nadajnik radiowy, mikroprocesor, pami˛e´c, ´zródło zasilania oraz odpowiednie czujniki, np. o´swietlenia, wilgotno´sci, akcelerometr itd. W przypadku sieci zło˙zonych z kilkuset czy kilku tysi ˛ ecy w˛ezłów niezb˛edny jest wybór takiej architektury i technologii, które umoz˙liwia˛ wzgle˛dnie tanie wytworzenie poszczególnych urza˛dzen´ . W zwia˛zku z tym we˛zły sieci sensorowych charakteryzuja˛ sie˛ niewielka˛ pre˛dkos´cia˛ przetwarzania, ograniczona ˛ pamie˛cia˛ i zasie˛giem komunikacji. Oczywiste jest, z˙e kaz˙de z urza˛dzen´ musi miec´ zapewniona˛ energie˛ do działania. Najcz˛e´sciej stosowane jest zasilanie bateryjne, które ma niewielka˛ pojemnos´c´. Innym rozwia˛zaniem jest wykorzystanie fotoogniw do samoczynnego pozyskiwanie energii. Cz˛ esto stosowane sa˛ niskoenergetyczne protokoły komunikacyjne charakteryzuja˛ce sie˛ niska˛ przepływnos´cia˛ i niewielkim zasi ˛egiem. Ka˙zdy z w˛ezłów komunikuje si ˛e tylko z w˛ezłami znajduja˛cymi sie˛ w jego najbliz˙szym otoczeniu, tj. swoimi sa˛- siadami. Przesyłanie danych w sieci odbywa si ˛e z wykorzystaniem we˛złów pos´rednicza˛cych - stosowany jest schema więcej »

Experimental research characteristics of counterbalance valve for hydraulic drive control system of mobile machine - DOI:10.15199/48.2019.04.18
Leonid G. KOZLOV Leonid K. POLISHCHUK Oleh V. PIONTKEVYCH Mykola P. KORINENKO Roman M. HORBATIUK Paweł KOMADA Sandugash ORAZALIEVA Olga USSATOVA 
Introduction Mobile machines with hydraulic drive are widely used in industry, transport branch, agriculture [1-3]. Such machines, as a rule, are equipped with high variety of removable operating tools. It enables to use them during greater part of calendar year for performing various operations, such as digging, materials handling, loading operations with bulky materials. Systems of hydraulic drives control of such machines for energy saving, must provide the possibility of regulation of operation organs motion speed and working pressure of pumps in wide ranges. It is important to provide the reliable motion control of the executive device in case of alternating load. Hydraulic drives, based on spool hydraulic separators are widely used in mobile machines. In the process of operation such spools wear, this reduces the degree of leak tightness of hydraulic lines and complicates the operator’s control over the position of the executive device with the load. To provide the possibility of the control over the motion of the executive device and to decrease nonproductive power expenditures in case of the alternative loading counterbalance valves (CBV) are used in the hydraulic drives of mobile machinery. At the same time to provide high degree of leak tightness of operating hydraulic lines controlled check valves are used. Available CBV and controlled check valves increase the cost of the system of hydraulic drive control, its dimensions, mass and operation cost of the mobile machinery [1-7]. The authors elaborated the construction of CBV that simultaneously provides the possibility of the motion speed control of the executive device at the alternative loading and increases the leak tightness degree of the operating hydraulic lines of the hydraulic drive. The following problems are solved to realize the elaborated CBV construction:  provision of high degree of leak tightness;  statistic characteristics st więcej »

Experimental research of turbo-codes application in telemedicine systems with wireless body area sensor networks - DOI:10.15199/48.2019.04.30
Roman N. KVYETNYY Yuriy Yu. IVANOV Yaroslav A. KULYK Bogdan P. KNYSH Sergiy G. KRIVOGUBCHENKO Igor Yu. IVANOV Waldemar WÓJCIK Azhar SAGYMBEKOVA Nursanat ASKAROVA 
The evolution of science and technics has allowed to create a promising application of wireless sensor networks, that is called wireless body area sensor networks (WBAN). It has a huge potential for the revolutionary transformation of medical technologies [1-3]. WBAN can be used to provide assistance to automatic medical treatment, automatic dosing, and vital signal monitoring. Fig. 1 shows an intuitive view of automatic medical treatment process (closed loop control) [2]. At the first step various vital data are collected using different sensors attached to a person. These data are sent to the command unit. At the second step the command unit decides the corresponding treatment method or correct dosing based on the received vital parameters. After this the command unit sends a command to the action unit. At the third step the action unit applies the treatment or dosing to objectives. When the treatment or dosing is finished, sensors will collect updated vital data and the process enters another circulation. WBAN can provide a healthcare service in a more comfortable, convenient and economical way, than other conventional methods. WBAN provide the ability to broadcast multiple vital parameters in “online" mode, that provides an indispensable aid for people, who suffer from chronic diseases and acute attacks, allowing to react to the worsening of the disease. This is a key technology of “online" (contrast to the Holter "offline" monitoring) prevention of cardiovascular diseases (myocardial infarction or other abnormal conditions). The tumors diagnostics without biopsy may be done on the basis of the work of many miniature sensors, that can detect cancer cells. WBAN can help people with asthma by the way of monitoring airborne allergens and providing medics some "alert signals“ in real time mode. Also this technology can be integrated into the telemedicine system, that provides unobtrusive ambulatory monito więcej »

Generator modes for technological installations with variable parameters of the oscillating circuit - DOI:10.15199/48.2019.04.33
Vladimir DIAGILEV Valery KOKOVIN Saygid UVAYSOV Andrzej SMOLARZ Saule RAKHMETULLINA Yedilkhan AMIRGALIYEV 
In technological installations for ultrasonic machining (USM), piezoelectric and magnetostrictive transducers (PET and SME) of electric oscillations are used in mechanical deformation of the medium with processed products as executive bodies in various technological processes. To generate electric oscillations, specialized generators (inverters) are used. Technical characteristics and operating modes of this generator are subject to special requirements. Generally, the PET is a package of piezoceramic washers with a diameter of 20 to 120 mm and a thickness of 3 to 10 mm, reinforced with metal straps. When the piezo packet is generated by electric oscillations due to the secondary piezoelectric effect, its bends occur and mechanical oscillations arise [1]. For example, in engineering technologies where ultrasonic treatment is applied, a variety of operations can be performed. Such as:  Cleaning and washing products,  Cutting, microwelding, brazing,  Shaping of parts from hard or brittle materials,  Hardening of the cutting tool,  Actuation of a percussion instrument. In technological installations, especially where percussion impacts on the tool are used, there is a sharp change of the load PET. This affects the generator operating modes. It is known [2,3] that piezoceramics possess a very high electromechanical Q-factor and its resonance characteristic is very sharp, so if the frequencies of the feeding generator and the instrument do not coincide, emergency regimes may arise. In this case, the generator will operate in modes from idle to short circuit, which is accompanied by the occurrence of either over voltages or over currents in the circuit. Formulation of the problem On the assumption of the foregoing, it is possible to determine a number of requirements for supplying PET generators capable of operating both on a regular basis and in emergency conditions:  Sinusoid więcej »

Hybrid low-voltage networks as the element of the lifting of the efficiency and the independence in the distribution of electricity - DOI:10.15199/48.2019.04.03
Andrzej MALINOWSKI Jerzy SZKUTNIK 
For sales companies with the principal purpose it should be the elaboration of the coherent programme of the lifting of the efficiency, both in the organizational dimension and technical; in this range with the determinant should be the general rule: " to make more at smaller (the energy commitment - J.S.) - DOING MORE WITH LESS [8]. This is probably the most accurate and picturesque definition of the energy efficiency, describing in the complete way this issue. Poland in this area is found in the mainstream of actions, what a proof is adopted law about the energy efficiency, from the day 15 April of the year 2011, being an implementation to Polish conditions of Union [7] directives. Currently (2018) was accepted by government following with the amendment whose main objective is thrifty and effective using of the energy, the reduction of her consumption, the reduction of losses during her transmission and the reduction of the power requirement electrical. Currently Poland is characterized with the higher energy consumption of the industry than most developed countries of Europe (EU-15) [9,13]. According to data with 2017 of European Commission the indicator intensity almost twice exceeds European values. Indispensable becomes so the elaboration of the effective strategy resolvent in the way the complex above-problem, being a direct cancellation both to the European directive of as well as Polish legislations. Proposed concept "POLAND EFFICIENCY" [20,21,23] is directed to this part of the power engineering sector which deals with the chapter of the electrical energy and to customers - power consumers. Proposals include technical actions and organizational, because only such look on the problem, guarantees the effective action. A most important segment of the discussed strategy (Energy Saving) is directed to power consumers and founding the control a behaviour of customers (DSM) at under the look of degree of the energy comm więcej »

Implementation of dual-frequency resonant vibratory machines with pulsed electromagnetic drive - DOI:10.15199/48.2019.04.08
Volodymyr M. GURSKY Igor V. KUZIO Oleksiy S. LANETS Piotr KISAŁA Akmaral TOLEGENOVA Aigul SYZDYKPAYEVA 
At present, the systems with regulated modes using the control and feedback facilities are becoming more and more widespread. The implementation of such systems is very relevant problem for effective operation of vibratory machines with resonant modes. This is due to the influence of technological factors on the dynamics of their oscillatory system, in particular on its amplitude-frequency characteristic [1-4]. In order to balance this effect out, the amplitude and frequency control is used. It allows to eliminate structural inaccuracies (errors), to provide stable characteristics due to the effect of a changing load. The publications [4, 5] are devoted to solving this problem. In terms of introduction into practice, the resonant machines should be designed using an alternating current electromagnetic drive. This is due to the following factors: ─ high reliability and durability due to the lack of elements and pairs (couples) of mechanical friction; ─ simplicity of the machine starting up and stopping due to the absence of influence of the mechanical system on the drive dynamics, which is not typical for machines with an electromechanical drive using the effect of Sommerfeld [6]. Nevertheless, the vibratory resonant machines with single-frequency modes are of limited use [7]. The systems with two operation frequencies are much more effective [8- 10]. In addition to the technological advantages of dualfrequency resonant systems, it is also necessary to take into account higher dynamic stability in comparison with single-frequency systems [11]. The dual-frequency systems based on the combined ball-inertial vibrator may also be promising at the present time [8]. The proposed design allows to use the resonance mode at the same frequency due to the use of the Sommerfeld effect. However, such a vibrator has the disadvantages of the mode regulation since the changing of the harmonic amplitude value at this frequency więcej »

Improving the way of determination substances thermal physical characteristics by direct heating thermistor method - DOI:10.15199/48.2019.04.21
Grigoriy S. TYMCHIK Sergey M. MATVIENKO Igor SIKORSKY Piotr KISAŁA Karlygash NURSEITOVA Aigul ISKAKOVA 
When determining the coefficient of thermal conductivity by direct heating thermistor method there is an error of calculation, the value of which depends on the method by determining the coefficient of thermal conductivity. This problem can be solved by optimal and accurate determination of the calibration coefficients used in the calculations. In this work has been carried out the research of errors occurring in the application of known methods and proposed a new method for determining the thermal conductivity of substances to improve the accuracy of their measurement. Formulation of the problem The purpose of this work is to research the error of measurement for existing methods for the determination of thermophysical characteristics (TPC) measured by the direct heating thermistor method to increase the measurement accuracy by choosing the optimal method of mathematical calculations for the thermal conductivity of substances under study by measuring the temperature of the thermistor's heating during it`s heating under the action of electric current. Main research material The essence of the direct heating thermistor method is to use the phenomenon of it`s self-heating due to flow through it of electric current. The temperature of the selfheating thermistor will depend on the environment in which it is located, that is, from the TPC of the research substance, which the thermistor has a thermal contact with. For an ideal model of a thermistor sensor in the ball form with radius r with ideal thermal conductivity, provided that the thermistor is surrounded by the research material, the coefficient of thermal conductivity is determined by the formula [1]: (1) r T Pt     4 where λ - thermal conductivity coefficient of the investigated material, W/(m·K); Pt - thermistor power, W; r - radius of the head of the thermistor, m; ΔT - temperature of the thermistor, оi więcej »

Integration of hidden markov models in the automated speaker recognition system for critical use - DOI:10.15199/48.2019.04.32
Vjatcheslav V. KOVTUN Maria S. YUKHIMCHUK Piotr KISAŁA Akmaral ABISHEVA Saule RAKHMETULLINA 
In speaker recognition systems (SRS) as a whole and in the automated speaker recognition system for critical use (ASRSCU) in particular, use the classical methods of pattern recognition theory, namely statistical simulation methods for describing the vectors of individual features of speech signals. Most often, in models of Gaussian mixtures [1, 2], artificial neural networks [3, 4] or support vector machines [5, 6, 7]. Less used are hidden Markov models [5, 6, 8, 9], which, however, together with Gaussian mixtures models, are very often used as part of speech recognition systems. Gaussian mixture models (GMM) are used in SRS to estimate the density of the probabilities of the variability of speech data due to moderately low computational cost of analysis and convergent adaptation algorithms [9, 10], in particular, the Expectancy-Maximization (EM) algorithm, the Maximum a Posteriori Probability (MAP) algorithm or Maximum Likelihood Linear Regression Maximization (MLLR) algorithm. However, the GMM has a low sensitivity to the variability of speech signal over time, which is usually compensated by detail for an adequate description of the individual features of speech, which leads to an increase in the sensitivity of the received features space to the presence in a phonogram of a speech signal a noises of the surrounding space. In their turn, the hidden Markov models (HMM) are statistical models that describe the analyzed system as a Markov process with unknown parameters [6] in order to determine the most probable state of the sequence of units of acoustic elements of speech signals based on pretrained models. For SRS, each state of the HMM is represented by different stable elements of speech (for example, the phonemes), and the time information is encoded by the permitted transitions between states. Thus, the speaker recognition using HMM is to determine for each speaker the optimal position between the sequence of the więcej »

Low computational complexity algorithm for recognition highly corrupted QR codes based on Hamming-Lippmann neural network - DOI:10.15199/48.2019.04.29
Roman N. KVYETNYY Yuriy Yu. IVANOV Volodymyr V. PIVOSHENKO Yaroslav A. KULYK Bogdan P. KNYSH  Andrzej SMOLARZ Kuanysh MUSLIMOV Yerbol TURGYNBEKOV 
The beginning of the neural networks history is connected with the "connectionist models" or "parallel distributed processing", that are considered in the publication in 1943 of McCulloch and Pitts. These scientists proposed general approaches and specific mathematical models of the biological neural networks and their components - neurons, that became fundamental in the artificial neural networks theory. These neurons were presented as models of the biological neurons and as conceptual components for circuits, that performed computational tasks. They used threshold elements with two stable states, which are called “McCallock-Pitts neurons" [1]. The task of developing models and systems, which are based on the threshold elements was so unusual and complex, that only in 1956 was appeared the first capable artificial neural network - Rosenblatt perceptron. Its demonstrated the possibility of creating technical patterns, based on the models of the human brain, for image recognition. However, further researches of perceptrons showed, that their usage in the recognition systems is associated with many difficulties. In 1969 Minsky and Papert published their book, in which they described the deficiencies of the perceptron model and showed their fundamental nature. The negative prognosis of the authoritative scientists caused a decline in the interest in neural networks, which lasted more than ten years, but in the 80's after some important theoretical results, the neural networks began to rebound. The renewed interest is reflected in many researches, the amounts of funding, the number of conferences and journals associated with neural networks [2,3]. At the same time, neurocomputing begins to develop, which allows solving problems from different areas of knowledge using neural networks, which are modelled on ordinary computers [4]. The machine interpretation of the neural network came into the world of Computer więcej »

Mathematical models of dynamics of friable media and analytical methods of their research - DOI:10.15199/48.2019.04.13
Bohdan I. SOKIL Andriy P. SENYK Maria B. SOKIL Andriy I. ANDRUKHIV Mariana M. KOVTONYUK Konrad GROMASZEK Gulzat ZIYATBEKOVA Yerbol TURGYNBEKOV 
Methods of vibration treatment, vibration transporting, separation, adhesion, and hence the corresponding machines and equipment have been widely used in various industries [1-4]. Their implementation contributes to the intensification of various production processes, increases the level of mechanization of labor-intensive work, increases economic efficiency and productivity. With an increase in the intensity of production, the scope of application of vibrating machines expands, and new ones are created for various technological operations [1,4,5]. This is due to the simplicity of their designs, and in many cases, higher performance than that of conventional machines. Especially effective application of vibration equipment is in the chain of technological processes, which are associated with the processing of various friable mixtures, their dosage, mixing, separation, sealing, etc. [6,7]. In this case, along with the intensification of technological processes during the vibrational impact on the material, the quality of the final product improves: due to constant vibration, a high degree of separation of the mixture by its physical, mechanical or other properties is achieved. Despite the significant progress in the creation of a new and modernization of existing vibration equipment, theoretical studies related to the vibrational processes of friable media - sieve have not been properly developed due to the lack of satisfactory methods for analyzing these complex dynamic processes [8,9]. Above mentioned, on the one hand, led to the intensive introduction of vibration processes into production, on the other hand - it requires to change the basic dynamic characteristics of the working containers, and on this - the dynamics of the friable media, that is, using vibration machines of a controlled type [1,5,8,10-13]. For them, as a rule, there is no transition via the resonances of individual units and the machine as a whole, whi więcej »

Method of design calculation of a hydropulse device for strain hardening of materials - DOI:10.15199/48.2019.04.12
Roman R. OBERTYUKH Andrii V. SLABKYI Mykhailo V. MARUSHCHAK Oleksandr V. KOBYLIANSKYI Waldemar WÓJCIK Gulzada YERKELDESSOVA Ayaulym ORALBEKOVA 
Strengthening of details by superficial plastic deformation, In particular, vibration damping treatment is devoted to quite a large number of works, however, in most cases, these works are devoted to processing technologies or investigation of the received surface layer [ ], and there are no work on the development of methods for design calculations of devices for deformation strengthening of materials practical [1-4]. Therefore, the development of a method for design calculation of the original design hydropulse device [5,6] is an actual scientific and engineering task. Method of design calculation of a hydropulse device for deformation strengthening of materials It is based on the results of theoretical experiments on hydropulse drives and devices of various technical and technological purposes [1 - 3]. During the design calculations of the hydropulse drives and devices on their basis, the content and composition of the basic initial data is determined, in the first place, the purpose of the drive or the device, the required range of adjustment of operating parameters of the executive, such as, for example, the frequency of passage of pressure pulses generated by the pulse pressure generator (PPG) actuator or device, and the amplitude of the vibration of the actuator, the "opening" pressure of the PPG and the maximum inertial mass of the actuator of the actuator or device. The described general initial data required for the design calculation of the hydropulse devices (or drives) for strainreinforcing materials may be supplemented by additional data for specific circuitry and design features of the device. Materials and research results The method of a specific design calculation of a hydropulse device for strain hardening of materials will be considered for a device whose structural and calculation scheme is shown in Figure 1 [7]. The peculiarity of this device is that its power, elastic and distributive links are co więcej »

Microelectronic Transducer of Gas Concentration based on MOSFET with an Active Inductive Element - DOI:10.15199/48.2019.04.45
Alexandr OSADCHUK Volodymyr OSADCHUK Olena SELETSKA Lyudmila KRYLIK 
Transducers of gas concentration are widely used in the chemical and oil and gas industry for measuring of noxious gases concentration in the production and in the systems intended for environmental monitoring. The accuracy of the determination with control over time of the gas composition in the production and technological processes provides the appropriate quality of the executed work as well as ensures safety of working environment. The optical methods are considered as the most universal and simple methods for determination of gas concentration. The most perspective optical method is the absorption spectroscopy which has a low threshold of sensitivity (<1 μg/m3) and high selectivity. In the case of small concentrations of controlled substances, the sensitivity can be enhanced by increase in the thickness of the layer in which absorption occurs. Moreover, the advantages of this method include the multipurpose usefulness, high speed of measurements and simplicity of the implementation in the automated systems. The absorption spectroscopy method, based on the phenomenon of selective absorption of radiation by gases, is the basis of many devices. The selective absorption is explained by the fact that the radiation frequency is resonant for molecules of a certain gas. When light is absorbed, the atoms and molecules of substances pass into a new excited state. The basic gases which concentrations can be determined by the optical method with the optimal wavelengths to occur of absorption in the different areas of the infrared range are presented in [1]. Nowadays, there is a plenty of gas analyzers for a wide variety of gases. The parameters of gas analyzers with operation based on selective absorption of infrared (IR) band radiation by gases from a hydrocarbon group with a wavelength of 2 ÷ 5 μm are given in the papers [2-6]. The parameters of gas analyzers operating on the base of selective absorption of infrared więcej »

Numerical methods for solving the Modified Filter Algebraic Riccati Equation for H-infinity filtering - DOI:10.15199/48.2019.04.02
Zsolt HORVÁTH 
Diesel engines have become more complex and powerful in the past decade, moreover lots of the mechanical functions are being replaced by electric and electronic devices, which are controlled by the ECU. In order to ensure the strict environment policies, these devices and the ECU as well have to make sure the reducing of fuel consumption and the emission of pollutant species. On the top of this the ECU is also equipped with reliable fault diagnose system to detect possible actuator, sensor and component failures in the engine. The subject of our investigation is a robust model-based fault detection filtering of faults in the air-path of diesel engines. When designing a H-infinity filter, the filter gain can be obtained by solution of a Modified Filter Algebraic Riccati Equation (MFARE), which is one of the central and most difficult tasks in the synthesis, see e.g. in [1], [2], [3] and [4]. One way to get there is an applying gamma-iteration, another one, which is more state of the art, is using LMIs. Several investigations of robust control have been carried out in the past two decades using LMIs, see e.g. [5], [6], [7]. As a result, it has been stated, that LMIs are effective and powerful tools for handling complex, but standard problems, such as a fast computing of global optimum within some pre-specified accuracy. As even it is to be done in our case, solving the H-infinity optimization problem to specify the filter. This paper is organized as follows: after the introduction, in Section II we shortly revisit the problem of H-infinity optimization and describe the MFARE. In Section III MFARE is converted to an LMI as an optimization problem. In Section IV an algorithm called gamma-iteration is implemented to solve the MFARE, then it is formulated as a linear objective minimization problem using LMI. Deriving the Modified Filter Algebraic Riccati Equation for robust H-infinity detection filtering The optimal H-infinity więcej »

Pico hydro generator as an effective source of renewable energy - DOI:10.15199/48.2019.04.37
Sebastian RÓŻOWICZ Zbigniew GORYCA Grzegorz PECZKIS Andrzej KORCZAK 
Propeller hydro power turbine The most prevalent natural hydrological conditions in the lowlands, predominating in Central Europe are characterized by low heads in small and medium watercourses flow rates. Such conditions allow for the use of water head energy by means of water wheels, Banks- Mitchell turbines and propeller turbines [1]. Rational locations for these turbines possible installations are largely dispersed so that their powers do not usually exceed several to several dozen kW. Small hydro electric schemes containing generators below 10 MW can be classified as follows: Fig. 1a Set-up of hydro generator - source of supply below turbine The subject of the paper is the construction , empirical research and assessment of a 1kW pico turbine composed of an axial turbine and generator, designed to use hydropower of watercourses with low head and low discharge. Fig. 1b Set-up of hydro generator - source of supply above turbine Anti-cavitation surplus and set-up of water turbines. The smallest water turbines can be installed at the level of the upper tank (Figure 1a), while large ones usually require installation below the water table, in the bottom tank, (Figure 1b). Mini and pico propeller water turbines operating at a several-meter water head have an important advantage as they can work with suction and can be installed at the level of the upper tank, as shown in Figure 1a. This is due to the anti cavitational surplus of the turbine, which in this case is much smaller than the atmospheric pressure. As a result, a few-meter water head allows the turbines to work practically without an inflow, as almost the whole drop occurs in the suction pipe. This construction of the turbine significantly reduces the investment cost. For the installation of turbine shown in Figure 1a the following condition must be satisfied: the height of suction Hs must be smaller than the height of water H which must be smaller than the height więcej »

Simulation and development of energy-efficient vibration machines operating in resonant modes - DOI:10.15199/48.2019.04.11
Mykola M. RUCHYNSKYI Maxym I. NAZARENKO Ivan I. PEREGINETS Oleksandr V. KOBYLIANSKYI Piotr KISAŁA Arman ABENOV Zhazira AMIRGALIYEVA 
Energy saving is very important in developing new technologies and industrial equipment. The existing technologies and industrial equipment do not comply sufficiently with modern requirements concerning energy saving. One of the methods for solving the problems associated with energy saving is the development of vibration machines rated for operation in resonant vibration modes. Resonance vibration machines are widely used in the mining industry, the building-and-construction industry, and other industries. It is reasonably to use resonance vibration machines in processes where the vibration machine actuator acts directly on the material being processed. Such processes include processes for transporting, sorting, mixing, and compacting materials. Effective operation of resonance vibration machines is possible if the elasticity and dissipation properties of the vibration machine-medium system are accounted for, because such properties have a direct effect on the operational mode of the vibration machine. The further development of resonance vibration machines will be based on the combination of elastic and dissipative forces acting in the vibration machine-medium system. For this reason, it is necessary to use new methods for simulating, studying, and designing such systems. Analysis of study results and publications One of the basic problems concerning vibration machines consists in developing and validating their mathematical models. Paper [1] contains information on simulating vibrations in complex systems with indefinite nonlinearities, which are often spatially localized. Studied in this paper is the method, based on inverse optimization, for simulating dynamic nonlinearities in locally nonlinear systems. Studied in the paper [2] are the factors that cause changes in the dynamic response of a system consisting of two plates connected by a single fastening element. Notwithstanding the fact that paper [2] does not rela więcej »

Single Commercially Available IC: LT1228 Based Sinusoidal Oscillator - DOI:10.15199/48.2019.04.41
Songyos RUNGSA Adirek JANTAKUN 
The sinusoidal oscillator is extremely useful in communication systems, electronic power systems, and instrumentation/measurement systems [1-3]. Furthermore, a sinusoidal signal is a key part of training students in the laboratory [3-5] to become skilled electrical and electronic engineering. Today, sinusoidal oscillators are frequently used in research and a large number of results have now been published [1-22]. They employ different high performance active building blocks and exhibit several advantages such as: their condition and frequency of oscillation can be orthogonally or independently adjusted with the transconductance gains [3-9, 15-17, 20-22] or the parasitic resistances [2-4, 13, 16, 18] or voltage gains [1, 10, 12, 14]. The sinusoidal signal provides only voltage-mode [1-2, 7, 10-14, 19-20] or current-mode [3, 6, 8-9, 15, 18, 22]. Also, some circuits provide voltage and current-mode simultaneously [4-5, 16-17]. However, there are some drawbacks as it has been found that (i) there are many active devices [10-11, 13-14, 18-19] (ii) there are requirements for an extension or copy terminal of active devices [3-4, 7, 9, 15, 17] (iii) the use of floating capacitors may cause parasitic effects [8, 19, 21] (iv) the outputimpedance of voltage signal does not have low-impedance which is required for a voltage buffer [2, 5, 7, 10, 13-14, 17] (v) the active devices in [2, 4-5, 9, 11, 13-16, 18-20, 22] are not commercially available with IC, (vi) the results of oscillator circuits in [2, 4-5, 9, 11, 13-16, 18-20, 22] are only presented by computer simulation without an experimental implementation. A comparison of the proposed sinusoidal oscillator and recent research is shown in Table 1. This paper proposes a synthesis of the voltage-mode sinusoidal oscillator with gain control of the oscillation frequency. The proposed sinusoidal circuit enjoys several advantages such as (i) construction of a circuit is very simple empl więcej »

Solar cell parameters extraction optimization using Lambert function - DOI:10.15199/48.2019.04.43
Mohammed El amine AICHOUBA Mustapha RAHLI 
Solar is an emerging sustainable technology with immense potential to contribute largest investment in Green technology applications. The photovoltaic solar energy is one of the most used and promising resources in the renewable energy domain. The photovoltaic energy conversion is performed by cells based on semiconductors such as silicon, which exploits the photovoltaic effect. The these cells operation cells is described generally by the I-V characteristic which provides the information on the intern electric transport mechanisms and the technological steps imperfections of their fabrications [1-3]. The photovoltaic (PV) systems modeling has been the subject studies many recent, especially with the extension of use PV systems in different applications. The single-diode model cell solar was first used by Shockley in 1949 [4, 5] and has since been used in many other research and applications. This equivalent circuit model is based on five main parameters to be determined. The these parameters precise determination remains a challenge for the researchers, in fact, this determination is essential for the simulation, the quality control and the photovoltaic devices implementation answering to welldefined specifications [6]. These parameters also play an important role in the manufacturing processes optimization [7].The current in the Shockley equation is an implicit function; it includes dependent and independent variables at the same time. Implicit nature presents opposites to extract these parameters. An explicit analytic expression can be obtained using Lambert W [8-16]. In order to overcome these constraints that prevent the electrical parameters extraction, a new method is presented in this work. In its first part, the parameters are calculated using the Lambert function for different estimated values of the ideality factor in the interval [1-1.5], while the second part consists in determining graphically the best estima więcej »

Spectral properties of Tilted Bragg Gratings with different tilt angles and variable surrounding conditions - DOI:10.15199/48.2019.04.34
Piotr KISAŁA Waldemar WÓJCIK Aliya U. KALIZHANOVA Ainur K. KOZBAKOVA Zhazira Y. AMIRGALIYEVA Gulzhan KASHAGANOVA Saltanat N. AMIRGALIYEVA 
Fiber Bragg Gratings (FBGs) have become as an important field in technology of optical sensing due to their advantages in comparison to electronic counterparts. Most important advantages of this structures used as sensing elements are extremely small size, immunity to electromagnetic interference and ability to multiplexing of many structures in single fiber. They are generally very sensitive to temperature[1] changes and elongation of fiber with inscribed grating [2-4]. An important feature of FBGs used as sensing structures is that they are sensitive to many physical quantities which could lead to undesirable cross-sensitivity which occur in the same spectral response for changes of different quantities affecting the FBG. This property generally leads to requirement of temperature compensation. Scheme of internal structure and spectral characteristics of FBGs are presented in Fig. 1. The inconveniences resulting from spectral properties of conventional FBGs could be solved by performing a technological modifications e.g. by creating a chirp (variable period of internal refractive index perturbations in fiber core) to obtain desirable spectral properties. Fig.1. Scheme of internal refractive index structure in fiber core with inscribed Conventional FBG and spectral response in transmitted and reflected light Another possibility to change the spectral behaviour of gratings is creating the structure with introduced particular angle between planes of fiber core periodic fringes and fiber cross-section plane. In case of conventional gratings, planes of refractive index perturbations are parallel to crosssection plane of fiber while in tilted grating structure planes of internal fringes are angled in relation to cross-section plane with ΘTFBG angle [5,6]. Tilted fiber Bragg gratings (TFBGs) stand out by enhancement of resonances of backward-propagating cladding modes which is most evident effect of tilt angle introducing. więcej »

Straty w superkondensatorach przy dynamicznych obciążeniach magazynów energii pojazdów elektrycznych - DOI:10.15199/48.2019.04.38
Mirosław LEWANDOWSKI Marek ORZYŁOWSKI Maciej WIECZOREK 
Do napędu pojazdów elektrycznych wykorzystuje się sieci trakcyjne, magazyny energii oraz ogniwa paliwowe. Magazyny energii bazują zazwyczaj na akumulatorach, gdyż charakteryzują się one dużą energią właściwą. Ze względu na dynamikę jazdy, zwłaszcza hamowanie i przyśpieszanie pojazdów, magazyny energii powinny krótkookresowo przyjmować i dostarczać znaczne moce. Z tego względu wprowadzono hybrydowe magazyny energii [1, 2], w których stosuje się dodatkowo superkondensatory (SC). SC wprawdzie charakteryzują się mniejszą energią właściwą niż akumulatory, mają jednak nad nimi przewagę ze względu na większą moc właściwą. więcej »

Study of the dynamic stability of the belt conveyor adaptive drive - DOI:10.15199/48.2019.04.17
Leonid К. POLISHCHUK Leonid G. KOZLOV Oleh V. PIONTKEVYCH Roman M. HORBATIUK Bogdan PINAIEV Waldemar WÓJCIK Aigul SAGYMBAI Adil ABDIHANOV 
Goods flows, arriving on the belts of the conveyors of various technological applications are characterized by considerable irregularity both regarding the amplitude of loading and goods supply intervals. Irregularity ratio of goods flows can vary within the range of Кn=1,97...2,02 [1]. For this reason the utilization factor of the conveyors, for instance, at mining enterprises, is on average, 50...70% by power and 60...70% by operation duration. The drives of agricultural mobile machines accept loads, the intensity of which differs greatly at different phases of the technological cycle [1]. Transverse conveyors and conveyor unloader of root-cutting machine in the process of the motor transport change, operating with the harvester, stop and beets are accumulated in the tank of the harvester. After the restarting of the conveyors drives the technological loading on the conveyors increases 2,5...3 times as compared with the nominal loading. Similar operation modes are typical for the receiving conveyor of clamp former in the process of root crops unloading into the hopper from the motor transport. In this case, the failure of drive’s elements in electro mechanic drive of the conveyor, and in hydraulic drive [2] - emergency outage as a result of safety valve operation and the shutdown of the hydraulic motor is possible. For further resumption of the conveyor operation the load at its working unit is manually decreased and the restarting of the drive is performed. Such operation modes of the conveyor cause unjustified electric energy consumption, wear of the belt, idlers, increase of the idle run of the belt, downtime of the equipment. That is why, numerous studies [3-5] are aimed at the provision of the coordination of the operation parameters of belt conveyors drive with variable modes of goods flows. One of the directions of the research is the study of drives operation with the regulators of belt motion speed a więcej »

Substantiation of consolidated inertial parameters of vibrating bunker feeder - DOI:10.15199/48.2019.04.09
Oleksiy S. LANETS Irina A. DEREVENKO Volodymyr M. BOROVETS Mariana M. KOVTONYUK  Paweł KOMADA Kanat MUSSABEKOV Bakhyt YERALIYEVA 
Vibrating bunker feeders are commonly used to automate production processes. They are widely manufactured by different world enterprises: Spirol International Corporation, Moorfeed Corporation A Division of Executive Automation Systems Inc., NTN Corporation. [1-5]. Two main types of vibration bunker feeders can be distinguished: with directed (fig. 1) and independent (fig. 2) oscillations. In vibration bunker feeders with independent (elliptical) oscillations, the direction of throwing is provided by force disturbance at two independent coordinates. Therefore, for determining the coefficients of stiffness of elastic nodes, we use well-known expressions for the consolidated mass at rectilinear oscillations or the consolidated moment of inertia of the system at angular oscillations [6-10]. a) b) Fig. 1. Vibrating bunker feeders with guided (screw-like) oscillations in which the bowl is made cylinder-like (a) and a conical-like (b) In vibration bunker feeders with propeller oscillations, the direction of throwing is ensured due to sloping elastic elements. In such structures, the propeller movement involves two: rectilinear and angular. Therefore, in order to determine the stiffness coefficient of an elastic node on the basis of a hyperboloid torsion, it is necessary to know the consolidated mass or the summed moment of inertia at propeller-shaped oscillations, which themselves contain, respectively, the proportion of the consolidated moment of inertia of the system at angular oscillations or the consolidated mass in rectilinear oscillations [11,12,16]. Fig. 2. Vibrating bunker feeder with independent (elliptical) oscillations In the technical literature you can find methods for calculating vibration bunker feeders parameters. One of the defining parameters is the consolidated mass or the summed moment of inertia of the oscillatory system, the motion of which is carried out on a propellant trajectory. It is impossible to c więcej »

Terms of the stability for the control valve of the hydraulic impulse drive of vibrating and vibro-impact machines - DOI:10.15199/48.2019.04.04
Rostislav D. ISKOVICH-LOTOTSKY Ivan V. KOTS Yaroslav V. IVANCHUK Yevheniy І. IVASHKO Konrad GROMASZEK Assel MUSSABEKOVA Mashat KALIMOLDAYEV 
For realization of the most effective modes vibrating influence on the processed materials and the environment is perspective vibrating (VM) and vibro-impact machines (VIM) with hydroimpulse drive (HID) [1]. The main part of the HID is pressure pulse generator, or valve-pulser (VP) [2], which provides control the operation mode of the vibrating machine. Experimental data and practice operating of hydraulic components VM and VIM, controlled by valve-pulsators, show, that under certain conditions in dynamic system stable self-oscillation processes are excited. Therefore, it is important in the theoretical and applied aspects explore the conditions of excitation and the existence of selfoscillations. These issues have particular importance when developing rational constructions of hydraulic VM and VIM. The paper [3] presents the results of the research of pressure and lateral exertion on the piston valve. The obtained results are based on the equation Reynolds and equation Navier-Stokes, are compared with variations in the aspect ratio, cross-sectional area. This research purpose is to justify the use of the equation Reynolds for the analysis operating of the piston valve during cavitation. But application the equation Reynolds and equation Navier- Stokes does not allow the develop clear analytical criteria for determine the conditions for the work stability of the piston VP. In work [4] the static and dynamic behavior of the pressure control valve with nonlinear negative characteristics is investigated. This pressure regulating valve has the property of both reducing and increasing the pressure at the outlet and actuated by a solenoid. The presented model and linear analysis explains the negative spring constant force in the low-frequency range. The fluctuations of this pressure control valve are based on the principle excitatory force, but the operation of the VP, constructively based on the principle feedback on pressure. więcej »

The algorithm of multi-objective optimization of PM synchronous motors - DOI:10.15199/48.2019.04.46
Łukasz KNYPIŃSKI Lech NOWAK 
In comparison to high efficiency induction motors, the permanent magnet synchronous motors (PMSM) have many advantages: large torque-to-mass ratio, high efficiency, constant speed operation, and long operational life [1, 2, 3]. At present, the manufacturers of the permanent magnets produce high density magnets with better magnetic, mechanics and thermal properties. On the other hand, there are increasing requirements regarding energy saving and natural environmental protection. Therefore, the rapid development of the constructions of permanent magnet (PM) motors, in particular PM synchronous motors is observed. The PMSM machines are usually small and medium power motors [4]. The stator winding is distributed in the slots and often are wye connected. The PMSM motor winding are similar to the winding used in induction motors. Depending on the application of the motor and properties of used magnetic material, the PMSM structures may differ considerably. The way of mounting, types and dimensions of the permanent magnets in the rotor have essential impact on motor parameters [5]. The magnets may be mounted on the surface or embedded inside the rotor [6, 7, 8]. Typical structures are shown in Fig. 1. In recent years, the technology of magnetic powder has develops rapidly. This concerns both: hard and soft magnetic materials. Using this technology, it is possible to easy formation of the magnetic circuit geometry and also allows shaping the magnetic properties which depend on the used admixtures. More and more often designers and constructors of the permanent magnet machines make use of advantage of this technology [9]. Electric motors with hybrid excitation systems are constructed. In such constructions hybrid magnets excitation system compound from two or even several magnetic materials (with different properties) is often applied. Two chosen new constructions with hybrid rotors are presented in Fig. 2. New constructions of pe więcej »

The enhanced method of a spectrum’s window estimation - DOI:10.15199/48.2019.04.27
Yaroslav A. KULYK Bogdan P. KNYSH Yuryy Yu. IVANOV Anatolii V. POPLAVSKYY Andrzej KOTYRA Nataliya DENISSOVA Gulzat ZIYATBEKOVA 
Constunt increasing computer technologies' and the systems' implementation takes place in the geometrical progression's order, and the key feature of the computer's system development is the creation of the highly efficient and highly reliable methods of a data transmitting and receiving. Among all computer's networks the important place take the networks, that can provide the good work's results in the environment, that has a high level of the noises. Those are the industrial and the radio networks. In the industry the authenticity of the transmitted information is more important, than the speed of transmitting and very often there is the necessity to provide information transmitting in any conditions of the environment. In the Wi-Fi networks, when the error probability is 0.1, the loss of the transmitted information is 40%, and when the level of the noises is higher, the transmitting is impossible at all [1]. According to the radio networks standards [2], especially the Wi-Fi, WiMAX networks, the level of signal/noise should be more than 57 Db. In the networks on the base of the CAN С 2.0 technology, when the error counter reaches 256 in case of the concrete node, the shift Bus Off takes place, and in this work state the information transmitting is provided by the simplex mode of work [3]. There are many methods of data analything, but the traditional methods are not always be efficient in the case of the high level of transmitting noises, so the need of improvement of the current methods is always important [1,2,3]. One of such methods is the method of window spectrum estimation, which uses the mean estimation of the log spectrum of a signal. The main misfit of this method is decreasing of his implementation efficiency in the high noises environment. So, it is proposed to use the multiwindow mean estimation of the signal's log spectrum in order to get more precise estimatio więcej »

Theoretical investigations of the interaction of acoustic apparatus with technological environment working process - DOI:10.15199/48.2019.04.06
Iryna М. BERNYK Oleksandr F. LUHOVSKYI Waldemar WÓJCIK Indira SHEDREYEVA Gayni KARNAKOVA 
The ultrasonic wave moving from the acoustic apparatus to the technological environment creates compression and dilution zones in it; they change each other during each half-period of oscillation. The general idea of the process of oscillation of any environment is described by the classical theory of acoustics equations. However, the cavitation process is characterized by a much more complicated motion of the dispersed environment. The dispersed environment after obtaining a certain level of energy varies significantly both qualitatively and quantitatively depending on the type of treatment. The process of changing the environment state during its processing is typical. It is the following. The environment ceases to be solid under the influence of energy. Vapor-gas bubbles are beginning to form. They make a significant contribution to changing the rheological properties of the cavernous environment. The process parameters (density, viscosity, etc.) change, it affects the speed of sound velocity, absorption coefficient and wave resistance. It is possible to change the shape and nature of the wave process velocity. Existing dependencies, as a rule, describe the process of cavitation processing by equations with constant coefficients of parameters and rheological properties of environments. Practically there are no studies of the estimation of the environment impact on the technological process and the effects of the interaction between the apparatus and the environment. At the same time, ultrasonic cavitation technologies are widely used in the chemical, food and building industries to process materials with different properties and create new ones. Their efficient use requires consideration of these different properties for setting modes and processing parameters. Therefore, an urgent problem is the search for new methods for studying the change and assessing the impact of these changes on the processing process, including więcej »

Ultrasonic microcontroller device for distance measuring between dustcart and container of municipal solid wastes - DOI:10.15199/48.2019.04.26
Oleh BEREZIUK Mykhailo LEMESHEV Volodymyr BOGACHUK Waldemar WÓJCIK Karlygash NURSEITOVA Alina BUGUBAYEVA 
Relevance of study of municipal solid wastes (MSW) management lies in the fact that it is included into one of the clauses of the Association Agreement between Ukraine and the European Union [1]. The MSW annual amount in Ukrainian localities constitutes more than 46 million m3 [2]. Among the technologies for MSW management in Ukraine, the most widespread is burial in landfills and garbage dumps (96.5%), incineration at incineration plants (2.2%) and recycling (1.3%). Collection and transportation of MSW to landfills and waste incinerators is carried out by bodyequipped dustcarts in the quantity exceeding 4100 vehicles [2], which have the following methods of loading solid waste into the body: rear (70%), lateral (25%) and front (5%) [3]. To position accurately the dustcart within the range of gripping MSW container with manipulator, driver-operator should know the exact distance between the dustcart and container. Therefore, in our opinion, it is expedient to install in the dustcart a device for measuring the distance with possibility of displaying the distance in the driver-operator’s cabin. This is especially important for rear and lateral MSW loading, being most common in use. According to Decision of the Cabinet of Ministers of Ukraine No. 265 [4], ensuring use of modern highly efficient dustcarts in the country's communal services as the main element in the structure of vehicles for collecting and initial treatment of municipal solid wastes, is a relevant scientific and technical problem. Development of instruments for measuring distance between the dustcart and municipal solid wastes container with consideration of environmental parameters is one of the important objectives for solution of this problem. The purpose of the study is development of a device for measuring distance between the dustcart and municipal solid wastes container as based on the study of existing signal processing methods and measuring of p więcej »

Vibroabrasive machining of large-size products on hydropulse drive machines - DOI:10.15199/48.2019.04.07
Rostislav D. ISKOVYCH-LOTOTSKY Yurii V. BULYHA Iryna M. KOBYLYANSKA Andrzej KOTYRA Aliya KALIZHANOVA Yedilkhan AMIRGALIYEV 
Depuration of outer as well as inner surfaces of complex shape items from forge scales, corrosion, scum as well as processing these surfaces prior to coating by physical and chemical method or paint has been a pressing issue for the enterprises. The present day production faces such difficulties when preparing gas and oil pipes for installation, manufacturing hydraulic power cylinders and turntable-type bearing using low quality pipes, further mechanical processing of which requires expensive tools or ecologically hazardous methods of chemical refinement [2, 3]. Vibroabrasive machining is the most efficient method for depuration of long-length (> 2 meter length) large diameter tubes (> 120 mm). The known plane vibration item load, which is used by the most types of vibratory equipment is not efficient enough when processing large machine parts with complex surfaces. The most technologically advanced equipment for vibroabrasive machining of large machine parts is hydro-pulse drive machine (HPD), which ensures a complex space mode of vibration load. Vibration machines with hydro-pulse drive have a simple system for adjusting frequency and amplitude of oscillation of movable objects as well as energy of one working stroke in each direction of vibration load. Vibration machines hydro-pulse drive of complex space load may be built according to the control circuit for the actuating hydrocylnders by one or more pressure pulse generator (PPG). PPG may be connected to the actuating hydrocylnders “to the input", “to the output", or “combined" [5]. From the point of view of design simplicity, the interest attracts the hydro pulse drive vibromachine of a complex space load with one PPG, switched to the actuating hydrocylnders “to the output". The dynamic model applied When developing the hydropulse drive for the vibromachine of the complex space load, with an aim to receive the highest probable frequency of p więcej »

Wareable mobile measuring device based on electrical tomography - DOI:10.15199/48.2019.04.39
Tomasz RYMARCZYK Paweł NITA Andres VEJAR Michał WOŚ Barbara STEFANIAK Przemysław ADAMKIEWICZ 
The platform consists of a data collection device and an aggregation and processing mechanism to generate useful information for diagnosis or for initial monitoring of physiological changes in the body [2-6,13-18]. The tomographic platform will enable the monitoring of physiological processes using the observed changes in electrical conductivity. Considering surface and subsurface information and using hybrid algorithms, new insights can be explored more closely, for example: physiological changes can be related to a specific pathology, the patient's health status can be estimated or a more accurate assessment of drug therapy effects can be provided. The information generated by the platform will be used in diagnostics in order to facilitate the interpretation of patients' medical condition [1.7-12]. Electrical tomography (ET) for biomedical purposes presents structural differences in the general electrical impedance tomography (gpEIT):  Strengthening is limited by international medical standards regarding current level and frequency. In gpEIT, the current and frequency can be as high as devices and region of interest (ROI) can resist.  The impression should be transferred with the help of electrodes on the surface of the skin. In gpEIT, the electrodes can be inserted into the ROI or ROI area and can be immersed in an EIT tank filled with electrolytic fluid.  The stimulation / sensing of data collection and tomographic reversal must be as fast as possible to ensure visualization of the monitored patient in real time. In gpEIT, fast data acquisition and real-time visualization are optional.  Biological soft / hard tissue is a complex multi-scale matter (colloids -> cells -> tissues -> organs -> body). In gpEIT ROI is often made of simple materials.  The rhythm and dynamics of the human body modify the surface / volume of organs, e.g. in the case of lung or heartbeat monitoring, but więcej »

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