Analysis of dynamic properties of nonlinear control systems in which the frequency of nonsymmetric oscillations sharply changes

An approximate method is proposed for analysis of nonsymmetrical oscillatory processes in one class of nonlinear control systems where frequency changes sharply. The overall investigation procedure is shown independent of the point where the disturbance is applied or the system astatism order. The method efficiency is illustrated with an example of a transient process in a nonlinear variable structure system.