Approzimated Optimal Designs for a Simple Step-Stress Model with Type-Ⅱ Censoring,and Weibull Distribution

摘要：

This paper deals with theories for approximated optimal design for simple step-stress accelerated life testing (ALT) with type-Ⅱ censoring, and Weibull distribution.Statistically approximated optimal ALT plans are developed to minimize the asymptotic variance of the maximum likelihood estimators (MLE) of the p-th percentile of lifetime at design stress.For the complex of calculating the expectation of order statistics, the fisher information matrix for type-Ⅱ censored data is approximated by that for type-Ⅰ censored data The approximated optimal plan doesnt depend on the values of accelerating model parameters.Simulation results also show that the optimal stress levels are highest possible stress and lowest possible stress.

关键词： accelerated life testing step-stress optimal design type-Ⅱ censoring Cumulative ezposure model

作者: Hai-Yan Xu He-Liang Fei

作者单位: Department of Mathematics,Shanghai Normal University Scientific Computing Key Laboratory of Shanghai Department of Mathematics Shanghai Normal University Shanghai,P.R.China

会议类型: 国际会议

会议名称: 2009 8th International Conference on Reliability,Maintainability and Safety(第八届中国国际可靠性、维修性、安全性会议)

会议地点: 成都

会议语种:英文

页码: 1203-1207

在线出版日期: 2009-08-24（万方平台首次上网日期，不代表论文的发表时间）