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| Evaluation of Storage Life of Fuze via Step-stress Accelerated Life Test with Zero-failure Data |
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| DOI：10.7643/issn.1672-9242.2023.02.004 |
| KeyWord:fuze step-stress accelerated life test zero-failure data unreliability storage life life evaluation |
| Author | Institution |
| GUO Hua |
Beijing Aeronautical Technology Research Center, Nanjing , China |
| ZHU Feng-chun |
Beijing Aeronautical Technology Research Center, Nanjing , China |
| DOU Ren-fu |
Beijing Aeronautical Technology Research Center, Nanjing , China |
| ZHAI Shu-feng |
Beijing Aeronautical Technology Research Center, Nanjing , China |
| LI Jing-yu |
Beijing Aeronautical Technology Research Center, Nanjing , China |
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| Abstract: |
| 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. |
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