A modified rotation strategy for directed search domain algorithm in multiobjective engineering optimization

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    Abstract

    In the real-life multiobjective optimization, it is often required to generate a well-distributed Pareto set. Only a few methods are capable of tackling such a problem in a quite general formulation. The Directed Search Domain method (DSD) proved to be efficient and, therefore, attracted much attention. In this paper, two modifications to the rotation strategy of DSD algorithm are proposed. The first modification is meant to improve its computational efficiency. The second modification is to enhance the evenness of the Pareto set with a number of additional Pareto points. These points are obtained according to some specific rotation angles calculated in a particular way. The modified approach is verified on several test cases with three objectives, including an engineering case. The proposed algorithm is compared with both the original DSD and DSD-II algorithms. It is shown that the new approach can maintain the distribution of the Pareto set at a high level with a relatively low computational cost.
    Original languageEnglish
    Pages (from-to)877-890
    Number of pages14
    JournalStructural and Multidisciplinary Optimization
    Volume57
    Issue number2
    Early online date23 Aug 2017
    DOIs
    Publication statusPublished - Feb 2018

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