基于加速系数不变原则的失效机理一致性判别  

Failure mechanism consistency identification based on acceleration coefficient constant principle

作　　者：奚文骏[1] 王浩伟[1,2] 王瑞奇[1] 

机构地区：[1]海军航空工程学院兵器科学与技术系 [2]中国人民解放军91880部队

出　　处：《北京航空航天大学学报》2015年第12期2198-2204,共7页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(61273058)

摘　　要：为了解决加速退化试验中产品失效机理一致性判别难题,以Gamma退化模型为研究对象,提出了基于加速系数不变原则的失效机理一致性判别方法.在阐明失效机理一致性判别理论依据的基础上,引入加速系数不变原则推导出Gamma过程的参数在不同应力下应满足的变化规律,利用t统计量对参数一致性进行检验以判别失效机理是否一致.通过仿真试验和实例应用验证了所提的方法,研究结论显示所提方法具有良好的工程应用性.To solve the problem that it is hard to identify failure mechanism consistency in accelerated degradation test,taking a Gamma degradation model as research object,an identification method of failure mechanism consistency based on acceleration coefficient constant principle was proposed. The theory of identifying failure mechanism consistency was firstly explained,and then the acceleration coefficient constant principle was introduced to deduce the changing rule for parameters of Gamma process under different stress levels.The method based on t statistic was used to test the consistency of parameter estimates,so that whether the failure mechanism of product remains consistent or not can be identified. The proposed method is validated through simulation tests and case study,and the research conclusion indicates that the proposed method has a good engineering applicability.

关 键 词：失效机理 一致性判别 加速系数 加速退化 Gamma过程 

分 类 号：TB114.3[理学—概率论与数理统计] TB114.3[理学—数学]