引信步进应力加速寿命试验无失效数据情况贮存寿命评估  

Evaluation of Storage Life of Fuze via Step-stress Accelerated Life Test with Zero-failure Data

作　　者：郭华 祝逢春 豆仁福 翟树峰 李敬玉 GUO Hua;ZHU Feng-chun;DOU Ren-fu;ZHAI Shu-feng;LI Jing-yu(Beijing Aeronautical Technology Research Center,Nanjing 210028,China)

机构地区：[1]北京航空工程技术研究中心,南京210028

出　　处：《装备环境工程》2023年第2期26-31,共6页Equipment Environmental Engineering

摘　　要：目的针对某引信加速寿命试验出现无失效数据情况无评估方法问题,开展贮存寿命评估研究。方法根据某引信特点和样品条件,选取采用步进应力加速寿命试验。因本次样品量过少,不能进行摸底试验来确定合理的应力和步长,加速寿命试验只能采用其预估值,因而试验结果出现了无失效情况。为此提出先对无失效数据按贝叶斯统计方法将零失效比率(失效数/样本数)数据转换为非降序失效比率的失效数据,再按有失效数据的处理方法评估贮存寿命。结果以此方法编制计算程序,对某引信无失效试验数据进行处理,评估其贮存寿命为20.1a。结论采用贝叶斯统计规律处理无失效数据的方法有效可行,解决了引信步进应力加速寿命试验无失效数据情况下的贮存寿命评估难题。The work aims to study the storage life evaluation to solve problem of zero-failure data and no evaluation method in accelerated life test of a fuze.According to the characteristics and sample conditions of a certain fuze,step-stress accelerated life test was performed.Because the sample size was too small,it was impossible to carry out a fundamental test to determine the rational stress and step length,and the accelerated life test can only use its estimated value,so the test result showed zero-failure.In order to solve this problem,the data zero-failure ratio(number of failures/number of samples)was converted into failure data of non-descending failure ratio according to the Bayesian statistics method.Then the storage life was evaluated according to the processing method with failure data.The calculation program was compiled with this method to process the zero-failure test data of a fuze,and the estimated storage life was 20.1 years.The results of a fuze storage life evaluation show that the method of using Bayesian statistical law to deal with zero-failure data is effective and feasible,and solves the problem of the fuze storage life evaluation under the condition of zero-failure data in step-stress accelerated life test.

关 键 词：引信 步进应力 加速寿命试验 无失效数据 不可靠度 贮存寿命 寿命评估 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]