Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Global Optimization Using a Sequential Algorithm with Orthogonal Arrays in Discrete Space

이산공간에서 순차적 알고리듬(SOA)을 이용한 전역최적화

  • 조범상 (한양대학교 대학원 기계설계학과) ;
  • 이정욱 (대우 종합기계, 특수사업부) ;
  • 박경진 (한양대학교 기계정보경영학부)
  • Published : 2005.10.01
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Abstract

In structural design, the design variables are frequently selected from certain discrete values. Various optimization algorithms have been developed fDr discrete design. It is well known that many function evaluations are needed in such optimization. Recently, sequential algorithm with orthogonal arrays (SOA), which is a search algorithm for a local minimum in a discrete space, has been developed. It considerably reduces the number of function evaluations. However, it only finds a local minimum and the final solution depends on the initial values of the design variables. A new algorithm is proposed to adopt a genetic algorithm (GA) in SOA. The GA can find a solution in a global sense. The solution from the GA is used as the initial design of SOA. A sequential usage of the GA and SOA is carried out in an iterative manner until the convergence criteria are satisfied. The performance of the algorithm is evaluated by various examples.

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References

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