| Citation: | WANG Qianyuan, YUAN Hongjie, XU Ruyuanet al. Two-stage variable threshold correlative and competitive degradation modeling[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(2): 398-406. doi: 10.13700/j.bh.1001-5965.2019.0215(in Chinese)
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During the use of mechanical and electrical products, there are degradation failures and shock failures caused by the environment. It is often considered that self-degeneration and impact failure are independent of each other, or there is an incomplete phenomenon of the correlation, that is, the impact of the shock results in a sudden increase in self-degeneration. Considering that the impact will affect the degradation process, at the same time, the degradation will also affect the impact. When the amount of self-degradation reaches a certain value, it will not only affect the failure rate of impact failure, but also reduce the impact failure threshold of the product. As a result, the impact resistance of the product is reduced, and the impact failure process of the product shows a two-stage phenomenon. in the case of self-degeneration and shock failure, which is related and competitive, a reliability model for changing the failure rate and failure threshold has been established, which solves the problem of the incompleteness of the traditional competition model.
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