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Output feedback robust H control of uncertain fuzzy dynamic systems with time-varying delay

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4 Author(s)
Kap Rai Lee ; Dept. of Comput. Appl. Contro, Doowon Tech. Coll., Gyonggi, South Korea ; Jong Hae Kim ; Eun Tae Jeung ; Hong Bae Park

This paper presents an output feedback robust H control problem for a class of uncertain fuzzy dynamic systems with time-varying delayed state. The Takagi-Sugeno fuzzy model is employed to represent an uncertain nonlinear systems with time-varying delayed state. Using a single quadratic Lyapunov function, the globally exponential stability and disturbance attenuation of the closed-loop fuzzy control system are discussed. Sufficient conditions for the existence of robust H controllers are given in terms of matrix inequalities. Constructive algorithm for design of robust H controller is also developed. The resulting controller is nonlinear and automatically tuned based on fuzzy operation

Published in:

IEEE Transactions on Fuzzy Systems  (Volume:8 ,  Issue: 6 )