Modified harmony search optimization for constrained design problems

Authors:
Sungho Mun;Yoon-Ho Cho
Affiliations:
School of Civil Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 139-743, Republic of Korea;Department of Civil and Environmental Engineering, Chung-Ang University, 221, Huksuk-dong, Dongjak-ku, Seoul 156-756, Republic of Korea
Venue:
Expert Systems with Applications: An International Journal
Year:
2012

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Abstract

Constrained optimization is a major real-world problem. Constrained optimization problems consist of an objective function subjected to both linear and nonlinear constraints. Here a constraint handling procedure based on the fitness priority-based ranking method (FPBRM) is proposed. It is embedded into a harmony search (HS) algorithm that allows it to satisfy constraints. The HS algorithm is conceptualized using the musical process of searching for a perfect state of harmony. Here, the original heuristic HS was improved by combining both improved and global-best methods along with the FPBRM. The resulting modified harmony search (MHS) was then compared with the original HS technique and other optimization methods for several test problems.