Stochastic response surface method with enhanced weighting strategy
The weighted stochastic response surface method (WSRSM) has been demonstrated to be effective in improving the accuracy of the estimation of statistical moments and probability of failure (PoF) upon the stochastic response surface method (SRSM). However, it has been noticed that the weighting method in WSRSM may have little and sometimes negative impact on PoF estimation especially in the cases of low PoF. To address this issue, an enhanced weighting strategy is proposed that the weights of sample points are determined based on their importance not only to regression but also to PoF estimation. Specifically, relatively larger weights are assigned to points closer to the failure surface, which significantly accounts for the accuracy of PoF estimation. Comparative studies show that SRSM with the proposed weighting method outperforms WSRSM producing more accurate PoF estimation without incurring additional function evaluations.
Stochastic response surface method Sample weights PoF estimation Failure surface
Gaorong Sun
School of Aerospace Engineering, Beijing Institute of Technology, Beijing, China
国际会议
黄山
英文
272-279
2012-07-10（万方平台首次上网日期，不代表论文的发表时间）