Output Direct Feedback Control for Takagi-Sugeno Fuzzy Systems

This paper presents a systematic design method of output direct feedback controllers for Takagi-Sugeno (T-S) fuzzy systems. The direct use of the output measurements to produce the input signal to the controller avoids the requirement for measuring or reconstructing the entire state vector so as to decrease the complexity of the controller. In order to use the structural information in the rule base to decrease the conservatism of the stability analysis, the standard fuzzy partition (SFP) is employed to the premise variables of fuzzy systems. New stability analysis and design methods of output direct feedback controllers are presented and applied to a nonlinear mass-spring-damper mechanical system. The simulation results show that these methods are effective