Robust multi-model based control

This paper describes a novel robust control system design for nonlinear systems. The central concept is the robust identification of the plant by a time varying linear model and using it to design a robust controller stipulated by the H/sub /spl infin// control theory. In this approach, the nonlinear plant is replaced by a time varying linear plant, and the designed controller is also time varying. The assumption that the resulting controller will provide adequate control of the original nonlinear plant has been tested and validated on a power system model, which is a highly nonlinear and a complex dynamic system.