Adaptive Designs of Experiments for Accurate Approximation of a Target Region

作者：Picheny Victor^*; Gin**ourger David; Roustant Olivier; Haftka Raphael T; Kim Nam Ho

来源：Journal of Mechanical Design, 2010, 132(7): 071008.

DOI：10.1115/1.4001873

This paper addresses the issue of designing experiments for a metamodel that needs to be accurate for a certain level of the response value. Such a situation is common in constrained optimization and reliability analysis. Here, we propose an adaptive strategy to build designs of experiments that is based on an explicit trade-off between reduction in global uncertainty and exploration of regions of interest. A modified version of the classical integrated mean square error criterion is used that weights the prediction variance with the expected proximity to the target level of response. The method is illustrated by two simple examples. It is shown that a substantial reduction in error can be achieved in the target regions with reasonable loss of global accuracy. The method is finally applied to a reliability analysis problem; it is found that the adaptive designs significantly outperform classical space-filling designs. [DOI: 10.1115/1.4001873]

• 出版日期2010-7