Novel Accelerating Life Test Method and Its Application by Combining Constan Stress and Progressive Stress

作     者：Wen-Hua Chen Fan Yang Ping Qian Jun Pan Qing-Chuan He 

作者机构：Zhejiang Province's Key Laboratory of Reliability Technology for Mechanical and Electronic ProductZhejiang Sci-Tech University School of EngineeringHuzhou University 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2018年第31卷第5期

页      面：17-24页

核心收录：

学科分类：07[理学] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 070104[理学-应用数学] 0802[工学-机械工程] 0811[工学-控制科学与工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by National Natural Science Foundation of China(Grant No.51405447) International Science&Technology Cooperation Program of China(Grant No.2015DFA71400) 

主　　题：Constant stress Progressive stress Accelerated life test Optimal test plan Reliability test 

摘      要：Constant stress accelerated life tests(ALTs) can be applied to obtain a high estimation accuracy of reliability measure?ments, but these are time?consuming tests. Progressive stress ALTs can yield failures more quickly but cannot guaran tee the estimation accuracy of reliability measurements. In this paper, a progressive?constant combination stress ALT is proposed to combine the merits of both tests. The optimal plan, in which the design variables are the initial pro?gressive stress level, the progressive stress ramp rate, the sample allocation proportion of the progressive stress and the constant stress level, is determined using the principle of minimizing the asymptotic variance of the maximum likelihood estimator of the natural log reliable life for the connectors. A comparison between the optimal PCCSALT plan and the CSALT plan with the same sample size and estimation accuracy shows that the test time is reduced by 13.59% by applying the PCCSALT.