An Improved Multi-Objective Genetic Algorithm for Tuning Linguistic Fuzzy Systems
María José Gacto, Rafael Alcalá, Francisco Herrera · 2008
This work proposes the use of MultiObjective Evolutionary Algorithms to obtain Fuzzy Rule-Based Systems with good accuracy-interpretability trade-o. To do this, we present a new post-processing method that performs rule selection and membership function tuning by focusing in the Pareto zone containing the most accurate solutions but with the least number of possible rules. This method is based on the well-known SPEA2 algorithm, applying an intelligent crossover operator, considering some modifications to concentrate the search in the desired Pareto zone and including an incest prevention mechanism in order to obtain more global optima. The results show that improving the trade-o between exploration and exploitation in the search process enhances the SPEA2 algorithm performance.