科研之友
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摘要
As few or no failures occur during accelerated life test, it is difficult to assess reliability for long-life products with traditional life tests. Reliability assessment using degradation data of product performance over time becomes a significant approach. Aerospace electrical connector is researched in this paper. Through the analysis of failure mechanism, the performance degradation law is obtained and the statistical model for degradation failure is set up; according to the research on statistical analysis methods for degradation data, accelerated life test theory and method for aerospace electrical connector based on performance degradation is proposed by improving time series analysis method, and the storage reliability is assessed for Y11X series of aerospace electrical connector with degradation data from accelerated degradation test. The result obtained is basically consistent with that obtained from accelerated life test based on failure data, and the two estimates of product's characteristic life only have a difference of 8.7%, but the test time shortens about a half. As a result, a systemic approach is proposed for reliability assessment of highly reliable and long-life aerospace product.
