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Reliability for systems of degrading components with distinct component shock sets

机译：具有独特的零件冲击组的零件降解系统的可靠性

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This paper studies reliability for multi-component systems subject to dependent competing risks of degradation wear and random shocks, with distinct shock sets. In practice, many systems are exposed to distinct and different types of shocks that can be categorized according to their sizes, function, affected components, etc. Previous research primarily focuses on simple systems with independent failure processes, systems with independent component time-to-failure, or components that share the same shock set or type of shocks. In our new model, we classify random shocks into different sets based on their sizes or function. Shocks with specific sizes or function can selectively affect one or more components in the system but not necessarily all components. Additionally the shocks from the different shock sets can arrive at different rates and have different relative magnitudes. Preventive maintenance (PM) optimization is conducted for the system with different component shock sets. Decision variables for two different maintenance scheduling problems, the PM replacement time interval, and the PM inspection time interval, are determined by minimizing a defined system cost rate. Sensitivity analysis is performed to provide insight into the behavior of the proposed maintenance policies. These models can be applied directly or customized for many complex systems that experience dependent competing failure processes with different component shock sets. A MEMS (Micro-electro mechanical systems) oscillator is a typical system subject to dependent and competing failure processes, and it is used as a numerical example to illustrate our new reliability and maintenance models.
机译：本文研究了多组件系统的可靠性，这些系统要承受具有退化磨损和随机冲击的相关竞争风险，并且具有不同的冲击集。实际上，许多系统会受到不同类型和不同类型的冲击，可以根据它们的大小，功能，受影响的组件等进行分类。以前的研究主要集中于具有独立故障过程的简单系统，具有独立组件到达时间的系统。故障或共享相同电击组或电击类型的组件。在我们的新模型中，我们根据随机冲击的大小或功能将其分类为不同的集合。具有特定大小或功能的电击会选择性地影响系统中的一个或多个组件，但不一定影响所有组件。另外，来自不同冲击组的冲击可以以不同的速率到达并且具有不同的相对大小。针对具有不同组件电击组的系统进行了预防性维护（PM）优化。通过最小化定义的系统成本率来确定两个不同维护计划问题的决策变量，即PM更换时间间隔和PM检查时间间隔。进行敏感性分析以提供对建议维护策略的行为的了解。这些模型可以直接应用，也可以针对许多复杂的系统进行定制，这些系统会经历具有不同组件冲击集的相互依赖的竞争性故障过程。 MEMS（微机电系统）振荡器是一个典型的系统，会经受相关的和相互竞争的故障过程，并且被用作数值示例来说明我们的新可靠性和维护模型。

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