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| Lifetime Prediction of Missile Electrical Connector under Hot and Humid Environment |
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| DOI：10.7643/issn.1672-9242.2022.08.003 |
| KeyWord:electrical connector lifetime prediction missile service environment Wiener process Eyring model accelerated degradation test |
| Author | Institution |
| JIANG Pu-tao |
Naval Aviation University, Shandong Yantai , China;Unit 91423 of the PLA, Liaoning Dalian , China |
| HAN Jian-li |
Naval Aviation University, Shandong Yantai , China |
| MA Jun-hui |
Unit 92808 of the PLA, Hainan Sansha , China |
| WU Yi-qiao |
Naval Aviation University, Shandong Yantai , China |
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| Abstract: |
| This paper is to predict the remaining lifetime of a certain type of electrical connector. Taking a certain missile electrical connector as the research object, on the basis of analyzing missile service environment and failure mechanism of electrical connectors, and based on the degradation characteristics of electrical connector contact resistance performance, the Wiener process is used to fit the degradation track of the electrical connection performance. And then, with the drift parameters of the Wiener process as the intermediate variables, the generalized Eyring model is used to model the temperature and humidity stress. Then the parameters of likelihood function of performance degradation data are estimated according to the test data. Finally, combined with the acceleration model, the drift parameters under the normal stress level are derived, and the reliability model of the electrical connector is determined. The average lifetime of the sample electrical connector is calculated, which can further infer other lifetime information of this type of electrical connector. Wiener process can fit the performance degradation tracks of the electrical connector under hot and humid environment. The temperature and humidity stress are the key factors to be paid attention to when carrying out test of equipment on missile. Considering further improving the efficiency of accelerated degradation test under similar environmental loads, the temperature stress level can be increased to a certain extent. |
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