Equivalent techniques, extra comparisons and less conservative control design for Takagi–Sugeno (TS) fuzzy systems

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Equivalent techniques, extra comparisons and less conservative control design for Takagi–Sugeno (TS) fuzzy systems

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This study is divided in three parts. In the first part, the equivalence of recent strategies for stability analysis, namely the null term, the Finsler's lemma and the descriptor approach is demonstrated in the context of fuzzy Lyapunov functions (FLFs). In the sequel, this study presents new insights concerning the extension of typical right-hand side relaxations and the use of the FLF structure. Finally, an alternative less conservative non-parallel distributed compensation control design is proposed that generalises previous approaches.

Inspec keywords: control system synthesis; fuzzy systems; stability; Lyapunov methods

Other keywords: conservative control design; nonparallel distributed compensation control design; stability analysis; descriptor approach; fuzzy Lyapunov functions; Finsler lemma; right hand side relaxations; Takagi Sugeno fuzzy systems

Subjects: Stability in control theory; Control system analysis and synthesis methods; Fuzzy control

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