Recurrent fuzzy network design using hybrid evolutionary learning algorithms

  • Authors:
  • Chia-Feng Juang;I-Fang Chung

  • Affiliations:
  • Department of Electrical Engineering, National Chung-Hsing University, Taichung, 402 Taiwan, ROC;Institute of Bioinformatics, National Yang-Ming University, Taipei City 112, Taiwan, ROC

  • Venue:
  • Neurocomputing
  • Year:
  • 2007

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Abstract

This paper proposes a recurrent fuzzy network design using the hybridization of a multigroup genetic algorithm and particle swarm optimization (R-MGAPSO). The recurrent fuzzy network designed here is the Takagi-Sugeno-Kang (TSK)-type recurrent fuzzy network (TRFN), in which each fuzzy rule comprises spatial and temporal sub-rules. Both the number of fuzzy rules and the parameters in a TRFN are designed simultaneously by R-MGAPSO. In R-MGAPSO, the techniques of variable-length individuals and the local version of particle swarm optimization are incorporated into a genetic algorithm, where individuals with the same length constitute the same group, and there are multigroups in a population. Population evolution consists of three major operations: elite enhancement by particle swarm optimization, sub-rule alignment-based crossover, and mutation. To verify the performance of R-MGAPSO, dynamic plant and a continuous-stirred tank reactor controls are simulated. R-MGAPSO performance is also compared with genetic algorithms in these simulations.