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Wyniki 1-10 spośród 14 dla zapytania: authorDesc:"ANDRZEJ NAPIERALSKI"

» Generation of harmonic sequences in accordance to tonal harmony rules with artificial neural networks

WOJCIECH ZABIEROWSKI  ANDRZEJ NAPIERALSKI  
There has been a continuous research throughout the world. in the field of computer generated music. Many implementations has appeared as well as a lot of disputes on this topic, and it is now perceived as a branch of science. The computer participation in the process of music creation is not only restricted to being an aid for the composer. In fact, a machine is able to replace human in the creation process. There are some realizations that are purely machinegenerated and which were able to reach the top of pop music lists, successfully competing with human-made works. The elements of the branch of science mentioned above include musicological analysis of musical opus and automatic harmonization of the melody line. The research presented below can be applied in particular in [...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2009/11


 

» Blok zasilania bezprzewodowego modułu pomiarowego współpracujący z generatorem odzyskującym energię drgań mechanicznych

Bartosz PĘKOSŁAWSKI  Andrzej NAPIERALSKI  
Artykuł przedstawia ideę wykorzystania przekształconej energii drgań mechanicznych do zasilania bezprzewodowych modułów pomiarowych oraz strukturę i rozwiązania układowe dla bloku przetwarzania energii. Opisane zostały w skrócie piezoelektryczne generatory odzyskujące energię drgań wraz z ich obwodem modelującym. Przedstawione są wyniki i wnioski z wykonanych symulacji komputerowych różnych wariantów układów prostownika AC/DC i przetwornicy DC/DC. Abstract. The paper presents the idea of using vibration energy harvesters for powering of wireless measurement modules as well as the structure and circuits of a power processing block. Piezoelectric generators and their model are described in short. The results and conclusions from the performed computer simulations of various types of AC/DC rectifiers and DC/DC converters are also presented. (Power supply block for wireless sensor module using vibration energy harvester). Słowa kluczowe: odzyskiwanie energii drgań, blok zasilania, prostownik, przetwornica DC/DC. Keywords: vibration energy harvesting, power supply block, rectifier, DC/DC converter. Wstęp Technologie odzyskiwania z otoczenia różnych form energii są obecnie dynamicznie rozwijane ze względów ekonomicznych oraz związanych z ochroną środowiska naturalnego. Rozwiązania te są stosowane zarówno w dużej skali (elektrownie wodne, wiatrowe, słoneczne) jak i w małej skali (odzyskiwanie energii biomechanicznej, energii cieplnej ciała ludzkiego, energii odkształceń i drgań mechanicznych, energii fal radiowych, itd.). Dzięki rozwojowi niskomocowych elementów elektronicznych możliwe staje się zastąpienie zasilania bateryjnego źródłami opartymi o odzyskiwanie energii w urządzeniach przenośnych, implantach medycznych oraz bezprzewodowych sieciach sensorycznych. Ostatnie z wymienionych zastosowań jest bezpośrednim przedmiotem zainteresowań autorów. Współczesne systemy do monitoringu i diagnostyki stanu technicznego maszyn, budynków i po[...] więcej»
w zeszycie PRZEGLĄD ELEKTROTECHNICZNY 2010/9


 

» IGBT static model based on diffusion equation implemented in SPICE source code

ŁUKASZ STARZAK  ANDRZEJ NAPIERALSKI  
Bipolar power semiconductor devices, such as the PIN diode or the Insulated Gate Bipolar Transistor (IGBT), have the advantage of low voltage drop at high current densities. This is achieved through introduction of excess carriers into the wide, lightly doped base layer which is necessary for obtaining high voltage capability. A power semiconductor device is normally used as a switch. Bipolar power device switching takes more time and involves physical phenomena more complex than in the case of unipolar devices such as the power MOSFET. Thus, excess carriers influence strongly static and dynamic properties of the device. This causes problems when the device is used in a circuit but also makes its modelling more troublesome [1]. Motivation Power semiconductor device models presently fall into one of the following two categories. 1. Full physical models are based on microscopic description of physical phenomena and take into account the dimensions of the semiconductor structure. They are very accurate, yet not accessible to the average electronic engineer. They need special, multidimensional simulators that are costly and need special skills to be used. Moreover, geometrical and physical parameters must be known that are obviously not made available by device manufacturers. 2. In the widely used electronic circuit simulators, compact behavioural models are used. They are easy to use for circuit designers but yield inaccurate or even erroneous results. This is because they are either models of signal-oriented devices (as opposed to power-oriented ones) developed for the needs of VLSI circuit design,[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2011/3


 

» Modelowanie nieliniowych zjawisk termicznych w układach elektronicznych przy wykorzystaniu programu SPIcE

MAREK KAMIŃSKI  MARCIN JANICKI  ANDRZEJ NAPIERALSKI  
Rozwiązywanie równania przewodnictwa ciepła jest jedną z najważniejszych metod symulacji i modelowania zjawisk termicznych w układach elektronicznych. Równanie (1), opisujące pole temperatury, jest równaniem różniczkowym cząstkowym i jego rozwiązanie wymaga na ogół zastosowania metod numerycznych lub analityczno-numerycznych. Rozwiązania analityczne są możliwe tylko dla prostych kształtów ge[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2007/10


 

» Gate level thermal simulation of CMOS ICs with emphasis on switching power

SŁAWOMIR KŁĄB  ANDRZEJ NAPIERALSKI  GILBERT De MEY  
CMOS technology of ICs is the most dominant nowadays. The constant tendency to make circuits smaller and faster to reach better performance results in higher power density and higher operating temperature. The latter degrades IC performance and impacts reliability. Nowadays, more than 50% of chip failures is caused by overheating a circuit’s structure [1]. For those high-power ICs thermal investigations must be done. For further description of the simulation method it is necessary to define power dissipation in CMOS circuits and common sources of power consumption. Power consumption and heat generation in CMOS technology Every CMOS digital circuit dissipates power whether its logic state changes or remains unchanged. Its power consumption can be expressed as a sum of fo[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2009/12


 

» Od algorytmu dynamicznej cieczy sieciowej do dedykowanego komputera równoległego

Piotr POLANOWSKI  Jarosław JUNG  Rafał KIEŁBIK  Andrzej NAPIERALSKI  Krzysztof LICHY  
W tym artykule przedstawiamy koncepcję i realizację dedykowanego komputera równoległego opartego na modelu dynamicznej cieczy sieciowej (ang. dynamic lattice liquid - DLL). Jest to złożony układ elektroniczny, który zbudowano przy wykorzystaniu programowalnych tablic logicznych (ang. Field Programmable Gate Array - FPGA). Abstract. In this text we discuse conception and hardware realization of [...] więcej»
w zeszycie PRZEGLĄD ELEKTROTECHNICZNY 2008/11


 

» Aktuatory i sensory w technologii MEMS jako mikroelektromaszynowe elementy mechatroniki

Andrzej NAPIERALSKI  Michał SZERMER  Krzysztof SZANIAWSKI  Michał OLSZACKI  Cezary MAJ  
W artykule przedstawiono wybrane projekty mikromaszyn i mikrosystemów krzemowych zaprojektowanych w DMCS i wykonanych w technologiach MEMS. Należą do nich: mikrosilnik, mikropompa i mikrozwierciadło krzemowe, czujniki promieniowania podczerwonego, przetworniki elektrotermiczne, czujniki przepływu gazu, czujniki przyśpieszenia, punktowe źródła światła, tranzystory ISFET i CHEMFET a także różne warianty mikromaszynowych czujników przyśpieszenia oraz pomiaru ciśnienia wewnątrzczaszkowego. Abstract. In this paper the chosen microsystems designed in DMCS and manufactured in MEMS technology have been presented. The silicon micromotor, micropump and micromirror as well as IRS- infrared radiation sensors, ETC- electro-thermal converter, GFS- gas flow sensors, ASacceleration sensor, ISFET and[...] więcej»
w zeszycie PRZEGLĄD ELEKTROTECHNICZNY 2009/9


 

» Enhancement of piezoelectric vibration energy harvester output power level for powering of wireless sensor node in large rotary machine diagnostic system

BARTOSZ PĘKOSŁAWSKI  PIOTR PIETRZAK  MACIEJ MAKOWSKI  ANDRZEJ NAPIERALSKI  
Energy harvesting solutions have been dynamically developed in this decade. These solutions are needed due to both environmental and economical reasons. They are applied to generate e.g. electric energy on both larger (hydropower plants, windmill farms, solar power plants, geothermal systems) and smaller scale (harvesting of biomechanical energy, human body heat, mechanical strain and vibration energy, solar energy, radio waves energy, etc.). The development of small-size, low power electronic devices enables the replacement of batteries by energy harvesting power sources in wearable electronics, medical implants and wireless sensor networks (WSNs). The authors focus attention on the latter application. Wireless sensor networks gain an increasing importance and one of their mo[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2009/12


 

» Scripting languages for simulations in modern SCADA systems

PAWEŁ MARCINIAK  ZBIGNIEW KULESZA   ANDRZEJ NAPIERALSKI  RAFAŁ KOTAS  
Fast development in the field of technology and science (computer science, automation, electronics, robotics) made a significant impact on the appearance of contemporary factories and industrial plants. In modern manufacturing and industrial processes, mining and metallurgy industries, private and public factors leisure and security industries telemetry is often needed to connect equipment and systems separated by large distances (thousands of kilometers). New technology is being applied to almost every industrial process which demands an advanced control. SCADA systems provide real-time monitoring and control of your equipment.[1] SCADA systems have been around as long as there have been control systems. The first SCADA systems utilized data acquisition by means of panels of meters, lights and strip chart recorders. The operator had to operate manually various control knobs to handle supervisory control. These devices are still used to do supervisory control and data acquisition in small factories, plants and power generating facilities.[1] Modern SCADA systems refer to the combination of telemetry and data acquisition. SCADA involves the collecting of the information from PLCs (Programmable Logic Controllers, transferring it back to the central site, carrying out any necessary analysis and then displaying that information on operator screens, displays and personal computers. The required control actions are then sent back to the process. In practice SCADA is an industrial control system which encompasses: HMI (Human Machine Interface), computer system monitoring, data acquisition and processing, advanced visualization.[ 2] References [1] Griebel A. et al.: Integrated polymer chip for two-dimensional capillary gel electrophoresis. Lab on a Chip, 2004, vol. 4, 18-23. [2] Agirregabiria M. et al.: Concentration, lysis and real-time PCR on a SU-8 lab on a chip for rapid detection of Salmonella spp. in faeces. Proc. of μ[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2010/11


 

» Model of human palm controlled by glove with micromachined accelerometers

RAFAŁ KOTAS  ZBIGNIEW KULESZA  WOJCIECH TYLMAN  ANDRZEJ NAPIERALSKI  PAWEŁ MARCINIAK  
Human body is a model for imitation for scientists for many ages. It is so complex and complicated that only in a few areas machines have a similar functions and construction to human body. First mention about using prosthesis (artificial limb) appears to be in antiquity. They were invented for a special purpose which is replacing human arm or leg. Unfortunately many people have lost their arm or leg as a result of accidence or disease. Engineers decided to help these people. They created many inventions. In the beginning these prosthesis had only similar shape as the human hand, arm or palm. Other constructions were too heavy for real applications. And other were so complex and complicated that they were too expensive and out of ordinary people’s reach. The second field of technology connected with this research is the field of manipulators. In every century people were improving tools to make their work and life easier. Because of these new inventions people could work easier. They were replaced in many factories by manipulators. These machines are build as a model of human arm. Their task is to move heavy and dangerous things with high precision. The principle of operating The operation of this device could be divided into four main stages (Table 1). At first virtual glove measures the gravity acceleration. This measurement is implemented with the use of six micromachined accelerometers which are appropriately spaced on three fingers (thumb, forefinger and middle finger) and on the top of a palm. Virtual glove is shown in Fig. 2. Fig. 1. Demonstrating model of a human palm Rys. 1. Model demonstracyjny ludzkiej dłoni The object of this project was to build a model of human palm consisted of three fingers that could be used in many applications. It is shown in Fig. 1. The main goal wa[...] więcej»
w zeszycie ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 2010/11


 

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