An Observer-Based Robust Fuzzy Stabilization Control Design for Switched Nonlinear Systems with Immeasurable Premise Variables

This paper investigates the output feedback robust stabilization problem for a class of switched nonlinear fuzzy systems, in which the premise variables depend on the state variables and do not measured directly. A switched state observer is designed to obtain the estimation of the immeasurable states. By using the parallel distributed compensation (PDC) design method and the multiple Lyapunov function approach, an output feedback controller and the switching laws are developed. To obtain the feasible solutions of the control and observer gain matrixes, a novel decoupled method is proposed, and the sufficient conditions of guaranteeing the stability of the control system conditions can be transformed into some linear matrix inequalities (LMIs), which can be easily solved. Two simulation examples are provided to show the effectiveness of the suggested theoretical results.