Journal
IEEE TRANSACTIONS ON CYBERNETICS
Volume 52, Issue 7, Pages 5819-5827Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCYB.2021.3050542
Keywords
Fuzzy systems; Stability criteria; Lyapunov methods; Uncertainty; Shape; Power system stability; Computational modeling; Fuzzy control; Lipschitz function; Lyapunov function; stability; theoretical results
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This article examines the stability and parameter conditions of smooth fuzzy control systems, showing that they do not require a common Lyapunov function and exhibit high robustness. Comparisons with classical fuzzy models demonstrate the superior performance of smooth fuzzy models with respect to noise and parameter uncertainties.
Smooth fuzzy systems are the new structures of the fuzzy system which have recently taken attention for their capacity in system modeling. Hence, this article studies the stability of smooth fuzzy control systems and develops the sufficient conditions of the parameters for the stable closed-loop performance of the system. A major advantage of the presented conditions is that they do not call for a common Lyapunov function and therefore, no LMI is required to be solved to guarantee the stability of the fuzzy model. Besides, although they are the type-1 fuzzy model in nature, however, they show the high level of robustness to the noises and parametric uncertainties, which is comparable to the type-2 fuzzy models. Several comparative simulations demonstrate the capacity of the fuzzy models with the smooth compositions rather than the classical fuzzy models with the min-max or product-sum compositions.
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