ISSN 2224087X (Print) ISSN 22240888 (Online)
Collected scientific papers "Electronics and information technologies"
(In 19662010 published under the title "Electrical engineering")
(Certificate of State Registration ÊÂ ¹176186468ÏÐ from February 11, 2011)
Issue 58 Issue 58, Pages: 37 
On evaluation of maximal frequency for which instability of steady state is possible 
V. Odintsova, L. Sinitsky 
It is well known that in dissipative parametric circuits exists a frequency interval in which stability of the steady state is impossible. It is brief the maximal value of this interval is found. Euristic recommendation were obtained. Example which proves practical meaning of result is given 

Issue 58, Pages: 814 
Impact of phase error nongaussian distribution on the synchronization quality and boundary noise stability of phase lock 
A. Bondarev, O. Lazko, L. Nedostup 
In the paper is shown that influence of phase error nonGaussian distribution in the synchronization system gives an opportunity to increase precision of synchronization quality estimation. The durability bound of cumulant equations system enable to estimate the bound noise stability of synchronization. Development of those advantages becomes a future trends od described analysis method application 

Issue 58, Pages: 1519 
Mathematical model of the buckconverter 
I. Romaniv, L. Sinitsky 
The mathematical model of the buckconverter is constructed. There has been found the solution of such a model. The value of the solution vector under steadystate conditions is determined. The requirement and sufficient condition of the converter stability are derived 

Issue 58, Pages: 2026 
Màòhematical model of nerve impulse in a neuron 
V. Horyachko 
The mathematical model of nerve impulse propagation in a neuron is developed on grounds of parametrical electrical circuit with distributed parameters. The method of straight lines was used for analysis of a transient process. The approximation of ion conductivity of a membrane was carried out by using cubic splines. Results of mathematical experiments which were received on the developed digital model are being presented 

Issue 58, Pages: 2738 
Influencing estimation of substitution chart types twowinding transformers on calculation of their power descriptions 
G. Lysiak, V. Konoval, À. Trembeckyi 
Conducted highquality and quantitative comparative influencing estimation of substitution chart types twowinding transformers with concentric puttees and ferromagnetic core on the results of calculation losses power for different types of transformers in the set symmetric modes. Confirmed expedience of the use of the asymmetrical Òvisible taken electric chart of substitution 

Issue 58, Pages: 3943 
Analysis of electric circuits transient process with components described by discrete parameters 
P. Stakhiv, S. Renzinyak, A. Korud 
The problem of transient processes calculation in complex electric circuits consisting of elements with different physical nature using diakoptic approach is considered. Each element is presented as subsystem with its own mathematical model. Simulation of transient process is conducted using multirate method with estimation of interrelation between subcircuits in some time moments. Examples of calculation of linear and nonlinear circuit which contains long line are presented 

Issue 58, Pages: 4450 
Simulation of catastrophic faults in electronics DC circuit 
B. Blagitko, V. Rabyk 
It was proposed on algorithm for simulation of catastrophic faults in DC linear circuits by modification of conductance matrix of circuit. This algorithm permits modeling of catastrophic faults for a resistor, a voltage controlled source of current and a operational amplifier 

Issue 58, Pages: 5164 
Method for linear circuits transients calculation 
R. Filc 
The notion of equivalent of a function developable into Taylor series convergent over the interval ∞<t<+∞ has been introduced. Equivalents method for linear circuit transients calculation has been developed 

Issue 58, Pages: 6568 
Regularization of a method of search of periodic modes of the electronic circuits 
Y. Shmygelsky, M. Zhovtanets’ky 
Usage Tikhonov’s regularization of a method of Newton for search of a steady state of the nonlinear electronic circuits is considered. The results of numerical experiments represented 

Issue 58, Pages: 6972 
Method of periodic regimes analysis for nonlinear autonomous electric circuits 
V. Malyar, A. Malyar 
The main theses of the method of designing stationary periodic modes of autonomous nonlinear electric circuits by solving a boundary problem for differential equations, which describe the dynamic mode, applying the differential splinemethod have been expounded 

Issue 58, Pages: 7376 
The new approach to circuit steadystate monoharmonious processes analysis 
V. Tchaban 
In the paper is proposed new method of linear AC circuit steadystate monoharmonious processes analysis according to rules of DC circuit analysis. The analysis is realised in area of coordinate transformation. The real voltages and currents are determined according to inverse coordinate transformation. The method is intended for numerical methods. The example of analytic analysis is added 

Issue 58, Pages: 7783 
Parallel adaptive algorythm of radioelectronics circuits modelling 
I. Khvyshchun, B. Kviatkovsky 
The problem of distributed adaptive algorithm for radio electronics schemes modeling is described in this work. Detailed description of parallel program realization structure is being provided. Comparative analysis of program working on different count of computers is done. Parallel program was built by using the most popular system of parallel computing  MPI 

Issue 58, Pages: 8491 
Algorithm for synthesis of doublereflectortype antenna with elliptical auxiliary reflector in millimeter waveband 
I. Prudyus, Y. Zakharia, R. Andrushchak 
By geometrical optic method an algorithm for synthesis of doublereflectortype antenna with elliptical auxiliary reflector is considered. Such algorithm is based on some number of conditions, which fulfil the electromagnetic field in antenna structure. For millimeter waveband, it is proposed to fasten the auxiliary reflector on the antennaprotection dielectric plate. An example of antenna synthesis is added 

Issue 58, Pages: 9297 
Problems of guided electromagnetic waves exciterfeedstructure modeling 
Y. Zakharia 
Modeling problems in waveguide exciter analysis are considered. An algorithm for electrodynamic analysis use aperture model is given. Analysis results of exciter feed structure, driven from symmetrical strip line, are discussed. For often used exciterfeedstructure models a comparison is made 

Issue 58, Pages: 98103 
Semifield mathematical model of electromagnetic devices 
V. Maday, Î. Shegedyn, M. Sokolovsky 
Semifield mathematical model of electromagnetic devices is proposed. Interpolar interval of device describes by quazistationary equations of electromagnetic field and other construction remainder by equations of electromagnetic circles. Results of computer simulation are given 

Issue 58, Pages: 104111 
Mathematical model of deep slot induction motor in phase coordinates 
A. Tchaban 
In the paper is proposed the mathematical model of saturated deep slot induction motor in phase coordinates. The differential equations of electromechanical state and spatial quantization equations of electromagnetic field of rotor deep slots are wrote down in normal Cauchy form. The results of computation are given 

Issue 58, Pages: 112119 
Mathematical model of electromechanical phenomena in a synchronous nonsalient pole generator with respect to eccentricity. Part 2 
M. Howykowycz 
A nonlinear mathematical model for calculating transient phenomena in a 3phase synchronous nonsalient pole generator with consideration of eccentricity and an alternating saturation of the magnetic circuit is introduced. A unique system of integraldifferential equations describing electrical, magnetic, and mechanical conditions is formed. On grounds of solution of the system some thesis of nonlinear theory of electric machines with consideration of eccentricity were defined more accurately 

Issue 58, Pages: 120129 
Objectoriented mathemathical model of synchronous mashine 
A. Kutsyk 
For development of mathematical models of complicate elements of the electromechanics systems the objectoriented method is proposed. The objectoriented model of synchronous machine and the principles of modeling of the electromechanics systems with the use of offered approach are described in the paper 

Issue 58, Pages: 130137 
The features of the numerical methods application in the simulation of the modern electrical drives 
V. Moroz 
The analysis of features of the using of the numerical methods for ordinary differential equations in the simulation of the modern electric drives with impulse elements is conducted in the article. The example of the electrical drive model was realized in the popular environment of the imitation design MATLAB + Simulink. Problems of the recreation of basic coordinates using the numerical methods are shown. The approaches to their rational using are offered 

Issue 58, Pages: 138146 
Rotor ground fault protection of generator with static excitation system 
Z. Eleschova, A. Belan, D. Gasparovsky 
This paper deals with the influence of harmonics produced by the static excitation system of generator on the rotor ground fault protection of synchronous generator. The report brings measured courses of field voltage and current flow through insulation system of field winding during generator failurefree operation. There is analysed potential impact of static excitation system on correct function of rotor ground protection based on AC injection method 

Issue 58, Pages: 147153 
Thermoelectric power temperature dependencies Hgcontaining high temperature superconductors in narrow band model 
O. Babych, M. Vasyuk, M. Matvijiv, O. Zinovjev 
Temperature dependencies of thermopower Hgcontaining HTSC for different level of oxygen doping were calculated. The electonics spectrum parameters were estimated 

Issue 58, Pages: 154160 
The spin processes of thin films 
R. Pelenskyj 
Studied in the paper are mechanism of the rise and dissemination of spine waves in thin film media and the formation of dioin continnms of the near surface layer of a thin film 

Issue 58, Pages: 161166 
Effective method of dynamic adjustment of membership function’s parameters of fuzzyneural emulators VangMendel structure 
V. Shchokin, V. Sidorenko, O. Shchokina 
Results of development of genetic algorithm updating for carrying out of parametrical synthesis of asymptotic stability, intellectual control systems by technological processes are shown. The suggested modification of base genetic algorithm does not reduce parameters of algorithm efficiency at increase of algorithm speed on 2,55,5% from common time 

Issue 58, Pages: 167175 
The model of fluorescent lamp as object of control 
A. Lupenko 
The new dynamic smallsignal model of fluorescent lamp operating at high frequency is considered. The model is presented in term of lamp incremental impedance. The model parameters may be simply obtained from lamp dynamic VA characteristics. The model can be useful for stability analysis of open and closedloop high frequency lamp/electronic ballast systems. The model is in a good agreement with experimental results 

Issue 58, Pages: 176182 
Simulation of a Utype core eddycurrent transformer located on ferromagnetic material with "crack type" defects 
V. Gamaliy, D. Trushakov 
The work contains the results of theoretical and experimental research of interaction between a layingin Utype core eddycurrent transformer (ECT) and tested ferromagnetic material with defects of throughthethickness crack type at variation of the main disturbing factor  variable airgap fluctuation between the sensor and tested surface. There has been developed a graphicanalytical simplified model and received equations for engineering calculation of introduced inductances of such eddycurrent transformer depending on crack width and airgap fluctuation size. The have been received equations for estimation sensitivities of eddycurrent transformer to depends on crack width growth and to change of airgap 

Issue 58, Pages: 183188 
Selection of information of eddy current transducer on elements of primary measuring circle at transient regime 
M. Yatsun, A. Yatsun 
Grounded form of voltage of feed and current in the coil of excitation of eddy current transducer, this estimation of character commutations and certain basic quantitys of primary measuring circuit for the selection of useful information on a measuring coil about the object of control 

Issue 58, Pages: 189196 
Stabilized and compensated properties installation stabilization of mode of the dynamic load 
Y. Jovnir 
Method of the analysis stabilized and compensated installation stabilization of mode of the dynamic load on the basic inductivecapacitance transforms worked out 

Issue 58, Pages: 197201 
Rise of speedspeed system exactness with digital correcting device in optical electronic complexes 
I. Zadorogniy, G. Zadorogniy, V. Zadorogniy 
A method of rise of control system exactness is offered "speedspeed" optical electronic complex due to the choice of algorithms of digital correcting devices 

© Ivan Franko National University of Lviv, 2011
Developed and supported  Laboratory of high performance computing systems
