Robust Output Feedback Control of Constrained Nonlinear Processes via Piecewise Fuzzy Anti-Windup Dynamic Compensator

Abstract

In this paper, a novel anti-windup dynamic output compensator is developed to deal with the robust Hinfin output feedback control problem of nonlinear processes with input saturation and external disturbance. Via fuzzy modeling of nonlinear systems, the proposed piecewise fuzzy anti-windup dynamic output feedback controller is designed based on piecewise quadratic Lyapunov functions. It is shown that with a sector condition robust output feedback stabilization of input-constrained nonlinear processes can be formulated as a convex optimization problem subject to linear matrix inequalities. Simulation study on a strongly nonlinear continuously stirred tank reactor (CSTR) benchmark plant is given to show the performance of the proposed anti-windup dynamic compensator.