A design method of multivariable control systems by sequential reduction: considering frequency range

Abstract

In this paper, we present a design method of MIMO systems by sequential reduction considering frequency ranges. In each frequency ranges, the closed transmittance in a diagonal system can be approximated to the open-loop one by using weighting functions. At the same time, MIMO systems is modified to SISO system by weighting functions, therefore, its controller is easily designed. A simple example is shown to illustrate this method.