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Optimal maintenance strategy for systems with two failure modes

机译:具有两个故障模式的系统的最佳维护策略

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This paper considers a single-unit system subject to two types of failures: a traditional catastrophic failure and a two-stage delayed failure. Periodic inspections are carried out to identify the defective stage of the two-stage failure process, whereas preventive replacements are implemented to avoid any potential failure due to the catastrophic failure mode. We construct a basic maintenance model and then extend it to the cases of imperfect inspections (i.e., inspections that do not always notice a defective state). We analyze the renewal process of the system and establish the expected long-run cost rate (ELRCR). The optimal inspection period and preventive replacement interval are determined by minimizing the ELRCR. A case study on infusion pumps is presented to illustrate the proposed model. (C) 2017 Elsevier Ltd. All rights reserved.
机译:本文考虑了一个单位系统,受到两种类型的故障:传统的灾难性故障和两级延迟失败。进行定期检查以确定两级故障过程的缺陷阶段,而实施预防替代以避免由于灾难性的故障模式而导致的任何潜在故障。我们构建一个基本的维护模型,然后将其扩展到不完美检查的情况(即,检查并不总是注意到缺陷状态的检查)。我们分析了系统的续展过程,并建立了预期的长期成本率(ELRCR)。通过最小化ELRCR来确定最佳检查期和预防性替代间隔。提出了一种案例研究输液泵以说明所提出的模型。 (c)2017 Elsevier Ltd.保留所有权利。

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