THE PROCEDURE OF OPTIMIZATION OF LINEAR PERIODICALLY TIME-VARIABLE CIRCUITS IN AN ENVIRONMENT UDF MAOPCs
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2017, Vol 874, Issue 2017
Abstract
The paper presents the procedure of optimization of linear periodically time-variable circuits based on the calculation of circuit parametric transfer functions by the frequency symbolic method. The parametric transfer function is approximated according to the frequency symbolic method by the Fourier trigonometric polynomial, in which some or all parameters of circuit elements are given by symbols. These parameters act as variables while performing procedures mentioned. The peculiarity of optimization consists in the fact that the previously the assessment of stability (asymptotic) of investigated linear periodically time-variable circuits circuit within the prescribed limits of changing parameters is carried out and the permissible areas of their change in which circuit is stable are determined. Exclusively in these areas optimization occurs. The assessment of circuit stability is carried out by the real parts of the denominator roots of a normal parametric transfer function, which also is defined by the frequency symbolic method in the form of approximation by the Fourier trigonometric polynomials. For the optimization of linear periodically time-variable circuits the general additive criterion of optimality is selected, which represents the sum of squared deviations of output characteristics from the technical requirements. This paper proposes the optimization procedure of the linear periodically time-variable circuit with two varied parameters of elements. The assessment of stability in this case is carried out by the denominator of the normal parametric transfer function. The results of this assessment are the areas of stability, whose limits are described mathematically, and which, being expressed in the form of inequalities, are the conditions for carried optimization. Performing the procedures of tolerance analysis and optimization of linear periodically time-variable circuits, while assessing the asymptotic stability, provides adequacy of the results and increases the efficiency of further design stages.
Authors and Affiliations
Yuriy Shapovalov, Daria Bachyk, Bohdan Mandziy
Keywords
Related Articles
- EP ID EP455513
- DOI -
- Views 162
- Downloads 0
THE DISPERSION EQUATION FOR MODE SPECTRA EVALUATION IN OPENED LAYERED CYLINDRICAL DIELECTRIC WAVEGUIDES
This paper is devoted to the solving an eigenvalue problem for opened layered cylindrical waveguide structure with arbitrary finite number coaxial magnetodielectric layers. Classical method of separation of variables for...
CRYSTAL STRUCTURE OF SOLID SOLUTIONS LA1-XRXFEO3 (r = PR, nD)
Complex oxides with perovskite structure RFeO3, where R are rare earth metals, represent an important class of functional materials. RFeO3 compounds are used in thermoelectric devices, solid oxide fuel cells, as membrane...
NARROWING THE WIDTH OF THE SENSITIVE AREA OF MICROWAVE DOPPLER RADAR
The paper presents a way of narrowing the width of the sensitive area of radio-wave Doppler sensor. This is important when the sensor is used for oscillating measuring or biomedical research to eliminate the influence of...
STUDY OF THE LOAD MANAGEMENT MECHANISMS IN CONTENT DELIVERY NETWORKS
Concept content delivery network (CDN) system and load balancing mechanisms were considered in this paper. The main task of the CND network - providing the qualitative information delivery to the end user. Content Delive...
QUADRATURE DETECTOR SYMBOLIC MODEL
Quadrature detectors (QD) are widely used in a radioelectronic devices as alternative to the synchronous detectors. There are many applications where there is necessary to measure the amplitude of input signal with speci...