ABOUT THE ANALYSIS OF THE PULSE-WIDTSYSTEM WITH FEEDBACK

Аннотация

In the article research results of the pulse-width system (PWS) captured by a negative feedback circuit have been depicted. Based on an asymptotic method of order decrease in the linear part of system, we have offered a technique for decreasing the PWS to an equivalent nonlinear pulse-amplitude system for which known methods of research are applied.

Полный текст

Pulse-width systems (PWS) find application in automatic control devices, as well as in amplifiers of capacity of “D” class with an intermediate pulse-width modulation, captured by a negative feedback for the reduction of nonlinear distortions. Feedback presence in PWSs is inevitably connected with the problem of stability maintenance. The solution of this problem, in a comprehensible with practical application way for the PWSs generally does not exist. The possibilities of private decisions have been considered in [1; 2]. The aim of the present work consists in the search for new methods of the PWS stability analysis, applicable in practical applications. Methods of pulse-width systems analysis. An analysis of the pulse systems is made, as a rule, basing on the theory of trellised functions and discrete transformation of Laplasa [1]. The theory of pulse-amplitude systems has now developed in enough detail: for a linear path and for systems containing nonlinear inertialess elements [1; 2]. Unlike the АPS, the PWS is much more difficult to analyze, therefore it is investigated using data equivalent to the nonlinear АPS.