基于Copulas加速寿命试验中竞争失效模型的统计分析

摘要

在已有讨论竞争失效数据统计分析的文献中,大多数都假设失效机理之间相互独立.本文使用copula作为连接函数来考查加速寿命试验中的竞争失效模型.通过模拟,把失效机理相关时得到的结果与失效机理独立时得到的结果做了比较.最后分析了文献中的一个实际数据.%Among those papers discussing statistical analysis of competing failure data,most of them assume independence for failure modes.In this paper we use copula as the dependence link function to assess competing risk models in accelerated life testing.We compare via simulation the results of lifetime when the failure modes are dependent with those when the failure modes are independent,and apply our approach to a real data set in the literature.