Approximate multi-objective optimization using conservative and feasible moving least squares method: Application to automotive knuckle design

Chang Yong Song, Ha Young Choi, Jongsoo Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)


The original version of the moving least squares method (MLSM) does not always ensure solution feasibility for nonlinear and/or non-convex functions in the context of meta-model-based approximate optimization. The paper explores a new implementation of MLSM that ensures the conservative feasibility of Pareto optimal solutions in non-dominated sorting genetic algorithm (NSGA-II)-based approximate multi-objective optimization. We devised a 'conservative and feasible MLSM' (CF-MLSM) to realize the conservativeness and feasibility of multi-objective Pareto optimal solutions for both unconstrained and constrained problems. We verified the usefulness of our proposed approach by exploring strength-based sizing optimization of an automotive knuckle component under bump and brake loading constraints.

Original languageEnglish
Pages (from-to)851-861
Number of pages11
JournalStructural and Multidisciplinary Optimization
Issue number5
Publication statusPublished - 2014 May


All Science Journal Classification (ASJC) codes

  • Software
  • Control and Systems Engineering
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Control and Optimization

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