Fuzzy methodology for frequency response estimation of uncertain dynamic systems |
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| Authors: | Carlos Cesar Teixeira Ferreira Ginalber Luiz de Oliveira Serra |
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| Affiliation: | Federal Institute of Education, Science and Technology (IFMA), S?o Luís‐MA, Brazil |
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| Abstract: | Fuzzy frequency response: definition and analysis for uncertain dynamic systems is proposed in this paper. In terms of transfer function, the uncertain dynamic system is partitioned into several linear sub‐models and organized according to Takagi–Sugeno fuzzy representation. The main contribution of this paper is to demonstrate through the proposal of a Theorem that fuzzy frequency response is a boundary in the magnitude and phase Bode plots. Low‐ and high‐frequency analysis of fuzzy dynamic model is obtained by varying the frequency ω from zero to infinity. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | fuzzy inference systems Takagi– Sugeno fuzzy control uncertain dynamic systems frequency response analysis |
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