Takagi-Sugeno fuzzy modeling incorporating input variables selection

Authors:
M. L. Hadjili;V. Wertz
Affiliations:
Centre for Syst. Eng. & Appl. Mech., Catholic Univ. of Louvain, Louvain-la-Neuve;-
Venue:
IEEE Transactions on Fuzzy Systems
Year:
2002

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Abstract

Fuzzy models, especially Takagi-Sugeno (T-S) fuzzy models, have received particular attention in the area of nonlinear modeling due to their capability to approximate any nonlinear behavior. Based only on measured data without any prior knowledge, there is no systematic way to obtain a T-S fuzzy model with a simple structure and sufficient accuracy. The main idea discussed in this paper is to reduce the complexity of T-S fuzzy models by estimating an optimal number of fuzzy rules and selecting relevant inputs as antecedent variables independently of the selection of consequent regressors. A systematic procedure is proposed here and illustrated on static and dynamical nonlinear systems.