The Research Of Controller Switching Method Based On T-S Fuzzy System

T-S fuzzy model can be used for model nonlinear systems, based on its advantagesit can be used for researching its stability and the controller design with a systematicmethod. However, the current research results of T-S fuzzy hybrid control system isquite limited, especially rare for research of output feedback switch controller. Thispaper is focused on a new research of stability is studied based on the T-S fuzzy model.The dissertation mainly studies the issue of stabilization control design for severalclasses of T-S fuzzy system, the content mainly includes:（1）For uncertain T-S fuzzy systems, the PDC method is used to design outputfeedback switching controller, and the multiple Lyapunov function method and singleLyapunov function method is used to analyze the stability of it, finally some sufficientconditions which guarantee the system’s stability and the switching law are given.（2）In the process of modern industrial control, the delay always exists because ofthe signal transmission and other reasons, so for uncertain time-delay T-S fuzzy system,the method of hybrid control is used to design output feedback switching controller andswitching law for local model of continuous fuzzy system, using theMATLAB/SIMULINK software to simulate based on LMI, and verify the feasibilityand effectiveness of the theoretical derivation.（3）Since the actual system there will be inevitable disturbance, the structuraldisturbance is discussed, when its states can be incompletely measured, designing theoutput feedback switching controller for the local model of the fuzzy model, the methodof Lyapunov function is used to analyze system and makes the system asymptoticallystable under the switching strategy, using LMI to solve, the sufficient conditions for asymptotic stability of the system is given, prove the feasibility and effectiveness of thedesign with the comparative example.（4）The H hybrid control issue of uncertain time-delay T-S fuzzy system isstudied. The items of uncertainties and external interference are introduced into the T-Sfuzzy system and modeling, output feedback switching controller is designed for localmodel, the switching law are respectively designed under the methods of singleLyapunov functions and multiple Lyapunov functions, and the sufficient conditions forasymptotic stability of the system is achieved, finally the simulation comparisonshows the output feedback switching controller enables the system to quicklyasymptotically stable.