On-line fuzzy identification using genetic algorithms

  • Authors:
  • K. M. Chow;A. B. Rad

  • Affiliations:
  • The Hong Kong Polytechnic University, Department of Electrical Engineering, Hung Hom, Kowloon, Hong Kong;The Hong Kong Polytechnic University, Department of Electrical Engineering, Hung Hom, Kowloon, Hong Kong

  • Venue:
  • Fuzzy Sets and Systems - Fuzzy systems
  • Year:
  • 2002

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Abstract

The design and implementation of an on-line fuzzy identification method using genetic algorithms (GAs) is reported in this paper. In the proposed algorithm, the rule-table of a fuzzy system is first divided into several independent and much smaller fuzzy systems, which in turn are encoded into separate bit strings for genetic operations. A novel GA updating architecture is then proposed to search the optimal rule-base of these fuzzy systems at each sample interval. The performance of this identification algorithm is evaluated by simulation of a non-linear system. Moreover, an experiment on simple behavior learning of a mobile robot is also reported. The results indicate an improvement in design cycle and convergence to the optimal rule-base within a relatively short period of time.