Structure-specified IIR filter and control design using real structured genetic algorithm

Authors:
Chih-Wei Tsai;Ching-Huei Huang;Chun-Liang Lin
Affiliations:
Department of Electrical Engineering, National Chung Hsing University, 250 Kuo-kuang Rd., Taichung 402, Taiwan, ROC;Department of Electrical Engineering, National Chung Hsing University, 250 Kuo-kuang Rd., Taichung 402, Taiwan, ROC;Department of Electrical Engineering, National Chung Hsing University, 250 Kuo-kuang Rd., Taichung 402, Taiwan, ROC
Venue:
Applied Soft Computing
Year:
2009

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Abstract

This paper develops an innovative optimization method, real structured genetic algorithm (RSGA), which combines the advantages of traditional real genetic algorithm (RGA) with structured genetic algorithm (SGA), and applies it for digital filter and control design optimization problems. For infinite impulse response (IIR) filter designs, the proposed approach fulfills all types of filters by minimizing the order of the filter and the absolute error of both passband and stopband. Both system structure and parametric variables are simultaneously optimized via the proposed chromosome scheme. The approach has also been extended to deal with robust control design problems. The approach offers an effective method for designing an optimal controller with robust stability. Simulation and experimental results conveys the excellence of the proposed algorithm over traditional approaches in convergence speed, performance, cost effectiveness, and attains simpler structure.