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| Accelerate Storage Life Test and Reliability Evaluation |
| Received:January 08, 2019 Revised:March 25, 2019 |
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| DOI：10.7643/ issn.1672-9242.2019.03.015 |
| KeyWord:storage life step-down stress comprehensive stress reliability growth |
| Author | Institution |
| YAO Jun |
School of Reliability and Systems Engineering, Beihang University, Beijing , China |
| HAN Na |
School of Reliability and Systems Engineering, Beihang University, Beijing , China |
| FU Ling-li |
School of Reliability and Systems Engineering, Beihang University, Beijing , China |
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| Abstract: |
| Objective To propose a step-back stress accelerated storage life test method under comprehensive stress in view of various environmental stress suffered by equipment during storage in engineering practice, and the commonly used accelerated storage life test only considers single stress and cannot reflect the real environmental stress of products. Methods Due to the complex composition and structure of equipment-level electronic products, it was difficult to determine the failure mode. The reliability growth theory reflecting comprehensive stress was introduced to test the growth trend of test data with the Duane model. The acceleration factor and acceleration model were obtained, and the equipment life under normal stress was further obtained. Results The step-back stress accelerated storage life test method could comprehensively consider influences of various environmental stresses on the equipment life, and the reliability growth theory could be used to evaluate the equipment life characteristics with complex failure modes effectively. Conclusion This method can comprehensively consider the impact of various environmental stresses on the equipment, and better reflect the environmental conditions caused by the vibration of the equipment. Evaluating the accelerated test with the reliability growth theory can avoid the disadvantages of not being able to evaluate due to the unclear failure mode. |
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