H_∞Output Tracking Control of Switched Fuzzy Systems

This paper addresses the H ∞ output tracking control problem for switched fuzzy systems. The objective is to design a controller to make outputs of the system tracking reference signals. Firstly, a state-dependent switching law is designed, together with the switched fuzzy controller. Then, sufficient conditions for H ∞ output tracking performance of the switched fuzzy system are derived in the form of linear matrix inequalities (LMIs). Furthermore, the way to get parameter matrices of the controller is also given in LMIs. Finally, the proposed controller is applied to the output voltage tracking problem for four-switch Buck-Boost (FSBB) converters, and the simulation results verify its effectiveness.