output feedback control method for a class of nonlinear interconnected systems is studied based on state observer.First
an equivalent T-S fuzzy model represents the nonlinear interconnected system and fuzzy decentralized observer is designed.Then a decentralized fuzzy observer and model reference H
∞
fuzzy controller based on the observer are developed.The sufficient conditions for the stability of the fuzzy decentralized system are proposed by using Lyapunov function combined with linear matrix inequality (LMI).Finally
the simulation example is given to illustrate the effectiveness of the proposed methods.