Optimization of Fuzzy Systems Using Group-Based Evolutionary Algorithm

Jyh-Yeong Chang, Ming Feng Han, Chin-Teng Lin

Research output: Contribution to conferencePaper

Abstract

This paper proposes a group-based evolutionary algorithm (GEA) for the fuzzy system (FS) optimization. Initially, we adopt an entropy measure method to determine the number of rules. Fuzzy rules are automatically generated from training data by entropy measure. Subsequently, the GEA is performed to optimize all the free parameters for the FS design. In the evolution process, a FS is coded as an individual. All individuals based on their performance are partitioned into a superior group and an inferior group. The superior group, which is composed of individuals with better performance, uses a global evolution operation to search potential individuals. In the inferior group, individuals with a worse performance employ the local evolution operation to search better individuals near the current best individual. Finally, the proposed FS with GEA model (FS-GEA) is applied to time series forecasting problem. Results show that the proposed FS-GEA model obtains better performance than other algorithm.
Original languageEnglish
Pages 291-298
Number of pages8
DOIs
StatePublished - 2012

Keywords

  • PARTICLE-SWARM OPTIMIZATION; DIFFERENTIAL EVOLUTION; CONTROLLER-DESIGN; GENETIC ALGORITHM; INFERENCE SYSTEMS; NETWORK

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