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Fuzzy controller based on chaos optimal design and its application
作者姓名:邹恩  李祥飞  张泰山
作者单位:[1]DepartmentofElectricalEngineering,ZhuzhouInstituteofTechnology,Zhuzhou412008,China [2]SchoolofInformationScienceandEngineering,CentralSouthUniversity,Changsha410083,China
摘    要: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.

关 键 词:自动化系统  模糊控制  混沌运算法则  参数  最优控制
收稿时间:6 May 2003
修稿时间:28 July 2003

Fuzzy controller based on chaos optimal design and its application
Zou En , Li Xiang-fei and Zhang Tai-shan.Fuzzy controller based on chaos optimal design and its application[J].Journal of Central South University of Technology,2004,11(1):98-101.
Authors:Zou En  Li Xiang-fei and Zhang Tai-shan
Affiliation:(1) Department of Electrical Engineering, Zhuzhou Institute of Technology, 412008 Zhuzhou, China;(2) School of Information Science and Engineering, Central South University, 410083 Changsha, China
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.
Keywords:fuzzy controller  chaos algorithm  parameter  optimal control
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