AN ALTERNATIVE METHOD FOR DESIGN OF MIMO SYSTEM WITH LARGE PLANT UNCERTAINTY

This paper presents an alternative design method for a linear time inv ariant n x n multiple-input-multiple-output feedback system with plant uncertainty and output feedback. Due to uncertainty, the plant P belo ngs to a set of P. It is required that for all P is-an-element-of P th e n2 system transfer functions be members of specified sets of accepta ble outputs. The plant uncertainties are transformed into equivalent e xternal disturbance sets, and the design problem becomes one of extern al disturbance attenuation. The method has been proven rigorous by mea ns of Schauder's fixed point theorem. This paper concentrates on the p ractical design procedures and compares the results with those obtaine d by other techniques.