Reliability demonstration based on accelerated degradation testing for unknown model parameters

Author:

Luo Wei1,Zhang Chun-Hua1,Chen Xun1,Tan Yuan-Yuan1

Affiliation:

1. Laboratory of Science and Technology on Integrated Logistics Support, College of Mechatronics and Automation, National University of Defense Technology, Changsha, China

Abstract

Conventional reliability demonstration tests are becoming increasingly difficult to apply for high-reliability and long-lifetime products owing to the excessive test duration, which conflicts with the marketplace demands for decreased development time. Accelerated degradation testing has been strongly recommended to reduce test time, but few studies employ this method for reliability demonstrations. In this article, a test methodology based on accelerated degradation testing is developed to demonstrate the reliability target for the case in which the model parameters for the test plan design are unknown. In the proposed procedure, step-stress accelerated degradation testing is employed as a preliminary test to estimate the model parameters. The data from step-stress accelerated degradation testing are converted based on equivalent degradation criterion and then used to make decisions by the method of two steps accelerated reliability demonstration test. If there are not enough converted data to make a decision, an accelerated degradation testing as a complementary test is conducted to complete the demonstration according to the estimates of the model parameters from the preliminary test; the two steps accelerated reliability demonstration test method is applied. The proposed methodology incorporates step-stress accelerated degradation testing with two steps accelerated reliability demonstration test to permit the test duration to be reduced as much as possible. It is useful to demonstrate a high-reliability target at long mission times within a feasible test duration when the design parameters are unknown.

Publisher

SAGE Publications

Subject

Safety, Risk, Reliability and Quality

Cited by 12 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Bayesian inference for a novel hierarchical accelerated degradation model considering the mechanism variation;Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability;2020-06-02

2. A censored sequential posterior odd test method in testability demonstration test planning;Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability;2020-05-26

3. A cost-driven reliability demonstration plan based on accelerated degradation tests;Reliability Engineering & System Safety;2019-03

4. A Fuzzy Bayesian Based Zero-Failure Accelerated Life Demonstration Test Design Method;2018 Prognostics and System Health Management Conference (PHM-Chongqing);2018-10

5. Reliability evaluation of grating encoder based on the accelerated degradation test;Journal of Physics: Conference Series;2018-09

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