模糊规则的自动提取与优化

顾林跃; 张立明

模糊规则的自动提取与优化

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出版历程
- 收稿日期: 1994-04-21
- 修回日期: 1995-10-16
- 刊出日期: 1996-03-19

AUTOMATICALLY EXTRACTING AND OPTIMIZING FUZZY RULE BASE

摘要

摘要: 本文提出了一种自动提取模糊規则集的新方法。本方法首先利用CCM分析闭环模糊系统在某一规则集控制下的全局动态行为,根据控制目标对该规则集进行评价得其性能指标。然后利用GA根据这个性能指标对规则集进行逐代更新和优化,最后得到一个满足要求的规则集。本文以复杂非线性系统倒摆系统为例,介绍用本文的方法提取模糊规则的具体过程,仿真结果表明了本方法的有效性和通用性。
- 遗传算法; 单元映射; 染色体; 适合度
Abstract: A method of automatically extracting and optimizing fuzy rule base is presented. Firstly, it applies the method of CCM (Cell-to-Cell Mapping) to analyze the evolving trend and global behavior of the closed-loop fuzzy dynamical system based on a cell state space. Secondly, each rule base is evaluated to determine a performance index according to the control objective. Thirdly, GA (Genetic Algorithm) updates the old population of coded rule bases using the performance index of each rule base generation by generation. A complicated nonlinear system---an inverted pendulum is simulated to illustrate the details of the algorithms and the results demonstrate the validity of the method.

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参考文献(1)

Bart Kosko. Neural Networks and Fuzzy Systems:A Dymanical Systems Approach to Machine Intelligence. Prentice-Hall Intelligence, Inc, 1992, 299-337.[2]Sulzberger M, Tschichold-Goldberg David E. Genetic Algorithms in Search. OptimizationMachine Learning, Reading. MA: Addison Wesley Publishing Company, Inc., 1989, Chap3, 4.[3]Goldberg David E. Genetic Algorithms in Search.[4]Addison Wesley Publishing Company, Inc.[J]..1989,Optimization Machine Learning:-[5]Karr L, Gentry J. IEEE Trans. on FS, 1993, FS-1(1): 46-53.[6]Mclnerney, Dhawan P. Use of Genetic Algorithms with Back Propagation in Training of Feed-Forward Neural Networks. IEEE ICNN, Vol.l, San Francisco: March 28-April 1, 1993: 203-208.Koza R, Keane A, Rice P. Performance Improvement of Machine Learning via Automatic Discovery of Facilitating Functions as Applied to a Problem of Symbolic System Identification. IEEE ICNN, Vol.l, San Francisco: March 28-April 1, 1993: 191-198.[7]Bornholdt Stefan, Graudenz Dirk. Neural Networks, 1992, 5(2): 327-334.[8]Yung Yaw Chen, Tsu Chin Tsao. IEEE Trans. on SMC., 1989, SMC-19(4): 745-755.[9]Smith Samuel M, Comer David J. IEEE Control Systems Magazine, 1991, 11(5): 18-28.[10]Hsu C S. Journal of Optimization Theory and Application, 1985, 46(4): 547-567.

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