An effective co-evolutionary differential evolution for constrained optimization

Fu-zhuo Huang

doi:10.1016/j.amc.2006.07.105

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An effective co-evolutionary differential evolution for constrained optimization

2007-03-01

524

PRE

Fu-zhuo Huang

王玲 (Ling Wang) *

Qie He

DOI：10.1016/j.amc.2006.07.105

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Abstract

En 中文

Many practical problems can be formulated as constrained optimization problems. Due to the simple concept and easy implementation, the penalty function method has been one of the most common techniques to handle constraints. However, the performance of this technique greatly relies on the setting of penalty factors, which are usually determined by manual trial and error, and the suitable penalty factors are often problem-dependent and difficult to set. In this paper, a differential evolution approach based on a co-evolution mechanism, named CDE, is proposed to solve the constrained problems. First, a special penalty function is designed to handle the constraints. Second, a co-evolution model is presented and differential evolution (DE) is employed to perform evolutionary search in spaces of both solutions and penalty factors. Thus, the solutions and penalty factors evolve interactively and self-adaptively, and both the satisfactory solutions and suitable penalty factors can be obtained simultaneously. Simulation results based on several benchmark functions and three well-known constrained design problems as well as comparisons with some existed methods demonstrate the effectiveness, efficiency and robustness of the proposed method. (c) 2006 Elsevier Inc. All rights reserved.

Keywords:

differential evolution

co-evolution

penalty function

constrained optimization