Combined Frequency and Time Domain Techniques for the Design of Compensator for Multivariable Nonlinear Control Systems

A combined frequency and time domain design technique is described for a class of multivariable feedback systems containing a set of coupled nonlinear elements of any general multivalued form. The parameter of the compensator is initially derived from the frequency domain analysis and automatically adjusted by the numerical synthesis routine in order to meet specified time domain performance. The method employs a combined analytical and synthesis procedures and provides a powerful tool in the design of a wide class of nonlinear multivariable feedback systems. Example is presented to demonstrate the efficiency of the proposed design technique.