摘要
在逐步Type-Ⅰ混合截尾场合下,研究竞争失效产品简单步进应力加速寿命试验的优化设计。假定产品寿命服从双参数Weibull分布,在形状参数和尺度参数都未知的情形下,得到相应的Fisher信息矩阵,以极大似然渐近方差最小为准则结合Fisher信息矩阵,给出了步进应力加速寿命试验的最优应力转换时间。最后利用Monte-Carlo方法进行数值模拟,并对模拟结果进行了分析。
This paper considers the optimum design of stress change time for the Weibull distribution with competing causes of failure under progressive type-I hybrid censoring. In the case that shape parameter and scale parameter are unknown, the corresponding Fisher information matrix are derived. Then the optimum stress change time is obtained under asymptotic variance criterion. Some analysis of numerical results are performed by Monte-Carlo simulations for illustrative purposes.
出处
《火力与指挥控制》
CSCD
北大核心
2015年第2期123-127,共5页
Fire Control & Command Control
基金
国家自然科学基金资助项目(71171164)
关键词
竞争失效
步加试验
混合截尾
WEIBULL分布
优化设计
competing causes of failure
step-stress accelerated life test
hybrid censoring
Weibull distribution
optimun test planning
