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An optimal preventive maintenance policy for a two-stage competing-risk system with hidden failures
Computers & Industrial Engineering ( IF 7.9 ) Pub Date : 2021-01-22 , DOI: 10.1016/j.cie.2021.107135
Yanjing Zhang , Jingyuan Shen , Yizhong Ma

In many complex industrial systems, failures are not always evident to the operating crew, thus inspections are used to identify such hidden failures and then make necessary maintenance actions. In this paper, we study a two-stage system that is subject to two competing risks of degradation and random shocks. Failures of this two-stage competing-risk system are hidden and could only be detected by periodic inspections. For such a system, a delay-time model is introduced to describe the evolution of the system behavior. Random shocks are assumed to follow a homogeneous Poisson process. A preventive maintenance policy is presented in response to the observed system state, based on which the expected cost rate of the system is derived. This paper aims to find the minimal expected cost rate by determining the optimal inspection interval. A numerical example is presented to demonstrate the applicability of the proposed method and results.



中文翻译:

具有隐藏故障的两阶段竞争风险系统的最佳预防性维护策略

在许多复杂的工业系统中,故障并不总是对操作人员很明显,因此使用检查来识别此类隐患,然后采取必要的维护措施。在本文中,我们研究了一个两阶段系统,该系统要承受两个相互竞争的退化和随机冲击风险。这种两阶段竞争风险系统的故障是隐藏的,只能通过定期检查才能发现。对于这样的系统,引入了延迟时间模型来描述系统行为的演变。假定随机冲击遵循均匀的泊松过程。响应于观察到的系统状态,提出了一项预防性维护策略,基于此策略可以得出系统的预期成本率。本文旨在通过确定最佳检查间隔来找到最小的预期成本率。

更新日期:2021-02-07
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