基于不确定理论的多部件竞争失效系统的可靠性评估

doi:10.6040/j.issn.1671-9352.0.2021.407

摘要/Abstract

摘要： 为了分析没有或仅有少量的历史故障数据的多部件竞争失效系统可靠性,同时考虑外界冲击对内部退化过程的影响,基于不确定理论分别建立串联竞争失效和并联竞争失效可靠性模型,并推导出相应的确信可靠度计算公式。通过一个微电子机械系统验证了模型的正确性和有效性。结果表明,外部冲击过程与内部磨损退化过程独立情形下的系统可靠度明显高于相依情形下的系统可靠度。

关键词: 竞争失效过程, 确信可靠度, 不确定理论, 冲击模型

Abstract: To analysis the reliability of multi-component competing failure system with little or no historical failure data, and determine the effects of external shocks on the internal wear degradation, the reliability models of series-competing failure and parallel-competing failure are developed based on uncertainty theory. Meanwhile, the belief reliability of the series-competing failure degradation system and the parallel-competing failure degradation systems are also derived. A micro-electro-mechanical systema(MEMS)are used to verify the correctness and validity of the proposed model. The results show that the system reliability is higher when the external shocks are independent of the internal wear degradation than when the external shocks dependent on internal wear degradation.

Key words: competing failure process, belief reliability, uncertainty theory, shock model

中图分类号:

O213

温艳清,刘宝亮,师海燕,陈剑慧,丰月姣. 基于不确定理论的多部件竞争失效系统的可靠性评估[J]. 《山东大学学报(理学版)》, 2023, 58(5): 76-83.

WEN Yanqing, LIU Baoliang, SHI Haiyan, CHEN Jianhui, FENG Yuejiao. Reliability evaluation for multi-component competing failure system based on uncertainty theory[J]. JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE), 2023, 58(5): 76-83.

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