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Model construction, rule reduction, and robust compensation for generalized form of Takagi-Sugeno fuzzy systems

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4 Author(s)
T. Taniguchi ; Dept. of Mech. Eng. & Intell. Syst., Univ. of Electro-Commun., Tokyo, Japan ; K. Tanaka ; H. Ohtake ; H. O. Wang

This paper presents a systematic procedure of fuzzy control system design that consists of fuzzy model construction, rule reduction, and robust compensation for nonlinear systems. The model construction part replaces the nonlinear dynamics of a system with a generalized form of Takagi-Sugeno fuzzy systems, which is newly developed by us. The generalized form has a decomposed structure for each element of Ai and Bi matrices in consequent parts. The key feature of this structure is that it is suitable for constructing IF-THEN rules and reducing the number of IF-THEN rules. The rule reduction part provides a successive procedure to reduce the number of IF-THEN rules. Furthermore, we convert the reduction error between reduced fuzzy models and a system to model uncertainties of reduced fuzzy models. The robust compensation part achieves the decay rate controller design guaranteeing robust stability for the model uncertainties. Finally, two examples demonstrate the utility of the systematic procedure developed

Published in:

IEEE Transactions on Fuzzy Systems  (Volume:9 ,  Issue: 4 )