Wyniki 1-7 spośród 7 dla zapytania: authorDesc:"Serhiy RENDZINYAK"

Simulation of spatial coordinate of movable ferromagnetic solid object in induced magnetic field by diakoptic methods

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In the paper transient processes of the electromagnetic-mechanical system are researched. Numerical experiments for transient analysis were carried out by software intended for simulation of electrical and electronic circuits by diakoptic methods where the large circuit is split on several parts - sub-circuits. Every part of the circuit is simulated independently on some time step. Numerical experiments have shown wide potential possibilities of proposed simulation method and its effectiveness. Streszczenie. W pracy omówiono badanie stanów nieustalonych w systemach elektromagnetyczno-mechanicznych. Do numerycznego modelowania stanów nieustalonych wykorzystano oprogramowanie wykorzystujące metody diakoptyczne, w których złożony system jest rozbijany na pod-systemy analizowane niezależnie dla każdego kroku czasowego. Eksperymenty numeryczne pokazały wiele potencjalnych zastosowań tej metody i jej efektywność. (Symulacja ruchu obiektu ferromagnetycznego w zewnętrznym polu elektromagnetycznym z wykorzystaniem diak optyki) Keywords: large complex system, diakoptic methods, subcircuit. Słowa kluczowe: złożone systemy, metody diakoptyczne, pod-obwody Introduction The problem of calculation of trajectory of moving body in magnetic field of composite configuration has theoretical and practical importance (Fig.1). Many researchers paid a lot of attention to this problem [1, 2, 3 etc]. The main difficulty of this task is available complex nonlinear dependencies in the system equations, the simplification which leads to significant distortions of the solution. Therefore, effective way is to calculate the transient processes and finding the optimum conditions of complex system represented by an equivalent electrical circuit, affordable modelling software of electrical circuits by diakoptic methods. Fig.1. Trajectory of moving body in magnetic field Analysis of large complex systems with lumped and distributed components usually is carried out [...]

Simulation of Movable Ferromagnetic Solid Object in Induced Magnetic Field by Diakoptic Methods

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In the paper transient processes of the system what consists of three parts: mechanical (ferromagnetic material in magnetic field), magnetic field of solenoid, and electrical (power supply circuits of solenoid) are researched by diakoptic method. A mathematical model of the magnetic system formed in the form of individual subcircuit as a result of the additional modeling of the magnetic field. Streszczenie. W artykule przedstawiono metody rozwiązywania stanów nieustalonych obwodów przez podzielenie ich na mniejsze problemy mechaniczne, magnetyczne i elektryczne zgodnie z metodyką diak optyczną. Model matematyczny podsystemu magnetycznego powstaje w formie indywidualnych podobwodów w wyniku dodatkowego modelowania pola magnetycznego. (Symulacja obiektu przemieszczającego się w polu magnetycznym przy użyciu metod diakopytcznych). Keywords: large complex system, diakoptic methods, subcircuit. Słowa kluczowe: duże złożone systemy, metoda diskoptyczna, podobwody Introduction In [1] posed the problem of simulation of spatial coordinate of movable ferromagnetic solid object in induced magnetic field by diakoptic methods. In furtherance of this task, then the point solid substituted for space magnetic body. These changes will significantly complicate the task, because in general it is impossible to express through the known physical functional formula to describe an object with distributed parameters, which has a time-varying geometrical configuration. Contrariwise known diakoptic methods of time domain simulation of complex system, which can be partitioned into heterogeneous parts [2]. In our case, the position of a ferromagnetic body in a magnetic field significantly affects its shape, resulting in a need to simulate the magnetic field at each time point, independently of previous computations. Then it’s generally not possible to construct a difference scheme. In this case come to the aid the simulation software for electromagnet[...]

Research of the Reliability of Personal Computer "IBM PC" Type

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This paper will present a research of the reliability of personal computer of “IBM PC" type with consideration of sequential and parallel connection of PC parts. The structure of the PC is presented in the form of separate modules. Research of reliability of the PC is carried out with Exponential distribution and Diffusion distribution. Streszczenie. W artykule zaprezentowano wyniki badań nad niezawodnością komputerów osobistych wraz z ich osprzętem. Autorzy posłużyli się metodami stochastycznymi analizując rozkład wykładniczy współczynnika awaryjności oraz rozkład Dn. (Badania niezawodności komputerów osobistych typu "IBM PC") Keywords: personal computer, structure of the personal computer, reliability Słowa kluczowe: komputer osobisty, niezawodność, bezawaryjny czas pracy Problem setting Electronic computers or personal computer (PC) are widely applied in different branches of industry, PC of one type and different configurations being used at different steps of production management. This simplifies creation of elemental base and software. Therefore, special attention must be paid to reliability of PC. Analysis of latest research and publications The given problem was partially enlightened in works [1- 4]. In work [1], research of reliability of PC software was described. In work [2-4] research of PC hardware was done, but sequential and parallel connection of PC parts was not taken into account therewith. Introduction Today especially is actual the question about reliability of personal computer, and also specific computing machine, which is charged to solve problems and tasks of various complexity and demanding various level of reliability [5]. Constructing of multi-machine computing complexes with increased reliability based on basic computing complexes can be realized by several methods: by organization of interconnection with implementation of common external memory drives (EMD); by organization of exchange among[...]

Features of subcircuits matching with components described by discrete parameters during analysis of electric circuits transient processes

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In the paper features of solutions matching of subcircuits with distributed and lumped parameters which should be integrated explicit and implicit numerical schemes. Usage of multirate method using test example of long line in no-load condition with respective limitations of integration step. Streszczenie. W artykule przedstawiono właściwości dopasowywania rozwiązań podukładów z rozproszonymi o[...]

Analysis of the effectiveness of parallel algorithms on the example of computation of transient processes in complex electronic circuits

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The problem of organization of calculation procedure of parallel computations of transient processes in electronic circuits by diakoptics is shown. External variables are computed with a delay in relation to internal variables. Evaluation of performance of parallel computations is implemented. It is provided to work each processor with separate groups of subcircuits on multiprocessors or local area network. The aim of this paper is to demonstrate the possibility of diakoptics usage due to modern computer technology, and to confirm an efficiently by computer experiments. Streszczenie. W referacie zaprezentowano wyniki równoległych obliczeń stanów przejściowych niejednorodnych nieliniowych układów elektronicznych wraz z ich analizą. Przeprowadzona analiza otrzymanych wyników obliczeń n[...]

Modeling of Electric Power Systems Based on Diakoptic Approach and Parallel Algorithms in Modern Computer Tools

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Electric power systems modeling using modern computer tools based on macromodeling and diakoptics principles and prospects of their research on uni- and multiprocessor computers are discussed. Electric systems splitting on several parts with the purpose of their further analysis by means of parallel processing algorithms, possibility and expediency of computer tools usage for their practical implementation are considered. Streszczenie: W artykule zaprezentowano metody makromodelowania i diakoptyki do badania systemów elektroenergetycznych. Podejście to jest zorientowane na zastosowanie obliczeń równoległych. Rozpatrywana jest możliwość praktycznej implementacji proponowanych algorytmów. (Modelowanie systemów elektroenergetycznych z wykorzystaniem nowoczesnego, równoległego oprogramowa[...]

Determining of complex magnetic permeability of the ferromagnetic material by complex impedance of inductance coil with ferromagnetic core DOI:10.12915/pe.2014.04.053

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The article presents a methodology of determining of complex magnetic permeability of ferromagnetic material by the results of measuring complex impedance of inductance coil with ferromagnetic core. The complex impedance of the inductance coil was measured with immittance meter E7-25. Streszczenie: W pracy przedstawiono metodę wyznaczania zespolonej przenikalności magnetycznej materiału przez pomiar zespolonej indukcyjności cewki z rdzeniem wykonanym z badanego materiału. Impedancja zespolona została zmierzona przy pomocy miernika immitancji E7- 25, opisanego w pracy. (Wyznaczanie zespolonej przenikalności magnetycznej przez pomiar zespolonej indukcyjności) Keywords: Inductance coil with ferromagnetic core, complex impedance, magnetic permeability. Słowa kluczowe: indukcyjność, cewka, rdzeń ferromagnetyczny, impedancja zespolona, przenikalność magnetyczna. doi:10.12915/pe.2014.04.53 Introduction A laying-on parametric eddy current probe (inductance coil with ferromagnetic core) with U-type core is traditionally used in the process of eddy current defectoscopy for ferromagnetic material with anisotropy properties. This eddy current probe is a coil with ferromagnetic U-type core with winding of number turns w thereon. To determine active resistance and reactance introduced by the tested area of ferromagnetic material it is necessary to know complex magnetic permeability. Earlier we devoted a number of works to research of interrelation of eddy current probe with ferromagnetic specimen [1]-[3]. Mathematical model of physical processes which occurs in the ferromagnetic core of the coil The objective of the research is development of methods for determining complex magnetic permeability of ferromagnetic material by the results of measuring of active resistance and reactance of inductance coil with toroidal core (shown in Fig.1). Fig. 1. A coil with toroidal ferromagnetic core The flux induced in the ferromagnetic core of inductance[...]

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