Based on piecewise fuzzy Lyapunov function,the properties of fuzzy control systems employing two-over.lapped fuzzy partition inputs are studied,and the notation of maximal overlapped—rule area is also proposed.These new suficient conditions to check the stability of a T-S fuzzy control system are proposed.The conditions require finding a common positive-definite matrix in each maximal overlapped-rule area,which can reduce the conservation and dificulty of former stability analysis approaches.Finally,an example is given to show the approach is effective and advantageous.
关键词
Keywords
references
Tanaka K,Sugeno M.Stability analysis and design of fuzzy control systerm[J].Fuzzy Sets and Systerm,1992,45(2):135-156.
Wang H O,Tanaka K,Griffin M F.An approach to fuzzy control of nonlinear systems;Stability and design issues [J].IEEE Transactions on Fuzzy Systerms,1996,4(1):14-23.
Daafouz J,Riedinger P,Lung C.Stability analysis and COBtrol synthesis for switched systerm : a switched Lyapunov function approach[J].IEEE Transactions on Automatic Control,2002,47(11):1883-1887.
Tanaka K,Hori T,Wang H O.A multiple Lyapunov function approach to stability of fuzzy systems[J].IEEE Transactions on Fuzzy System,2003,11(4):582-589.
Wang W J,Sun C H.A relaxed stability criterion for T-S fuzzy discrete systerm[C]//In proceeding of IEEE intemational Conference on Networking,sensing and contro1.Tai-pei,Taiwan,2004:937-942.
Wang W J,Sun C H.A relaxed stability criterion for T-S fuzzy discrete systerms[J].IEEE Transactions on systems,man and Cybmetics,Part B:Cybernetics,2004,34(5):2155-2158.
Johanson M,Rantzer A,Arzen K E.Piecewise quadratic stability of fuzzy systems[J].IEEE Transtations on Fuzzy systems,1999,7(6):713-722.
Feng G.Stability analysis of discrete—time fuzzy dynamic systems based on piecewise Lyapunov functions[J].IEEE Transations on Fuzzy systerms,2004,12(1):22-28.