Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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An Improved Stochastic Algorithm Using Kriging for Practical Optimal Designs

크리깅을 이용한 개선된 확률론적 최적화 알고리즘

  • Published : 2006.09.30
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Abstract

As many scientific phenomena are now investigated using complex computer models, the effective use of Kriging on physical problems has been expanded to provide global approximations for optimization problems. This paper is focused on the two types of strategies to improve efficiency and accuracy of approximate optimization models using Kriging. These methods are performed by the stochastic process, stochastic-localization method(SLM), as the criterion to move the local domains and the design of experiments(DOE), the classical design and space-filling design. The proposed methodology is applied to the designs of 3-bar truss, Sandgren's pressure vessel, and honeycomb upper platform of a satellite structure.

최근 공학적 설계문제들이 복잡해짐에 따라 크리깅을 이용한 근사최적화에 관한 연구가 활발하다. 따라서 본 논문에서는 개선된 확률론적 최적화 알고리즘을 제안함으로써 크리깅을 이용한 근사최적설계의 정확성과 효율성을 높이고자한다. 순차적 근사최적화 시 확률적인 설계영역으로의 이동을 위해 새로운 방법인 확률론적 국부화기법(SLM)을 제안하며, 고전적 계획법, 공간충진 계획법의 두 실험계획법을 사용함으로써 실험점 선정의 효율성을 높이고, 실험계획법의 종류에 따른 결과를 비교, 분석하였다. 또한 3부재 트러스, Sandgren의 압력용기 그리고 하니콤 인공위성 플랫폼 최적설계의 실제 공학적 문제에 적용함으로써 효율성을 검증하고자 한다.

Keywords

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