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Fuzzy controller based on chaos optimal design and its application

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Abstract

In order to overcome difficulty of tuning parameters of fuzzy controller, a chaos optimal design method based on annealing strategy is proposed. First, apply the chaotic variables to search for parameters of fuzzy controller, and transform the optimal variables into chaotic variables by carrier-wave method. Making use of the intrinsic stochastic property and ergodicity of chaos movement to escape from the local minimum and direct optimization searching within global range, an approximate global optimal solution is obtained. Then, the chaos local searching and optimization based on annealing strategy are cited, the parameters are optimized again within the limits of the approximate global optimal solution, the optimization is realized by means of combination of global and partial chaos searching, which can converge quickly to global optimal value. Finally, the third order system and discrete nonlinear system are simulated and compared with traditional method of fuzzy control. The results show that the new chaos optimal design method is superior to fuzzy control method, and that the control results are of high precision, with no overshoot and fast response.

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Correspondence to Zou En.

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Foundation item: Project (01JJY3029) supported by the Natural Science Foundation Hunan Province

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Zou, E., Li, Xf. & Zhang, Ts. Fuzzy controller based on chaos optimal design and its application. J Cent. South Univ. Technol. 11, 98–101 (2004). https://doi.org/10.1007/s11771-004-0020-7

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  • DOI: https://doi.org/10.1007/s11771-004-0020-7

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