基于退化模型的失效机理一致性检验方法
收稿日期: 2014-03-12
修回日期: 2014-09-18
网络出版日期: 2015-03-31
基金资助
国家自然科学基金 (61273058)
Test method of failure mechanism consistency based on degradation model
Received date: 2014-03-12
Revised date: 2014-09-18
Online published: 2015-03-31
Supported by
National Natural Science Foundation of China (61273058)
王浩伟 , 徐廷学 , 王伟亚 . 基于退化模型的失效机理一致性检验方法[J]. 航空学报, 2015 , 36(3) : 889 -897 . DOI: 10.7527/S1000-6893.2014.0265
An effective accelerated test must guarantee that the failure mechanism is unchanged. According to the features of reliability modeling under accelerated degradation test (ADT), a test method of failure mechanism consistency based on degradation model is proposed. Taking the degradation models based on stochastic process and degradation path fitting as examples, the inner connection between model parameters and failure mechanism consistency is constructed through two equivalent definitions of acceleration factor. Furthermore, the relationships which should be satisfied at different stresses are deduced. Then t statistic is utilized to test the consistency of samples on the basis that samples are assumed following a normal distribution. Two ADT cases are provided to validate the rationality of the proposed method.
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