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

In this paper, a novel anti-windup dynamic output compensator is developed to deal with the robust H_infin 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.