Reliability analysis of dependent competing failure processes with time-varying δ shock model

被引:29
作者
Lyu, Hao [1 ]
Qu, Hongchen [1 ]
Yang, Zaiyou [1 ]
Ma, Li [1 ]
Lu, Bing [1 ]
Pecht, Michael [2 ]
机构
[1] Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110003, Peoples R China
[2] Univ Maryland, Ctr Adv Life Cycle Engn, College Pk, MD USA
基金
中国国家自然科学基金;
关键词
Dependent competing failure processes; Time -varying ? shock model; Multiple failure processes; Degeneration model; MEMS; SYSTEMS SUBJECT; DEGRADATION;
D O I
10.1016/j.ress.2022.108876
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The dependent competing failure process model has received increasing research attention in recent years due to its essential role in describing system reliability. For the o shock model, as a main type of shock in dependent competing failure process, the system fails if the interval of time between two sequential shocks is less than a threshold o. As the operation of systems, the aging effect will gradually increase. Thus, systems affected by shocks need more time to recover from damages. In the time-varying o shock model, if damage shocks occur, the degradation rate and o value will change multiple times simultaneously. Three failure processes consisting of a soft process induced by a degradation process and two sudden failure processes due to random shocks. Sudden failure processes include fatal shocks and damaged shocks. Damaged shocks affect systems in three different ways: (1) impacting systems by causing the degradation increment, (2) increasing the degradation rate of systems, and (3) impairing systems' performance by increasing the o value. A real-world example of a microelectromechanical system is presented to show the applicability of the reliability model. Sensitivity analysis is evaluated to demonstrate how parameters affect reliability.
引用
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页数:18
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