Compensation of a class of nonlinear systems using linear techniques

Little compensation information, which is analytical and systematic for nonlinear systems, is available. The describing function method of analysis has been used to design linear and nonlinear compensation networks, but the results are subject to the approximations inherent in the describing function method. method. It is presented here which is based on an exact stability analysis method. Because of the mathematical methods used, the procedure permits the use of pole - zero concepts from the initial stability anal+ to the final steps of synthesizing a compensator. The method is applicable to switched type systems containing eithera perfect switch, switch with deadband, or a switch with hpteresis. In each case, the system is assumed to have one nonlinear element, a group of linear elements, and unity feedback.