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Reliability analysis of a cold-standby system considering the development stages and accumulations of failure mechanisms

机译：考虑发展阶段和故障机制积累的冷备用系统可靠性分析

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In this paper we classify failure mechanisms (FMs) into three types based on the triggering loads, including environmental load-triggered (E-type), operating load-triggered (O-type), and combined load-triggered (C-type) FMs. In a cold-standby component, E-type FMs develop when the component does not operate and may develop with different speeds due to changes in the environmental conditions at different stages. O-type FMs are triggered by operational loads. Environmental loads and operating loads are necessary for triggering C-type FMs. Previous studies have often assumed that cold-standby components are not subject to failures or degradation in the standby stage. However, E-type FMs can develop in cold-standby components at the standby stage and contribute to the degradation of the components. In this paper, we propose a hierarchical method based on the sequential binary decision diagram (SBDD) to analyze the reliability of a non-repairable cold-standby system while considering the correlation and development of FMs. In the case study, a reliability analysis is conducted for an example power supply subsystem equipped with an electronic control device, which comprises one primary unit and one cold-standby unit. The results show that the reliability of the cold-standby system is quite different when considering the development of E-type FMs in the cold-standby unit. In addition, the lifetime of the system will decrease when E-type FMs are considered in the simulation.
机译：在本文中，我们根据触发负载将故障机制（FM）分为三种类型，包括环境负载触发（E型），工作负载触发（O型）和组合负载触发（C型）。 FM。在冷备用组件中，当组件不工作时会产生E型FM，并且由于环境状况在不同阶段的变化而可能以不同的速度发展。 O型FM由运行负载触发。环境负载和操作负载对于触发C型FM是必需的。先前的研究通常假定冷备用组件在备用阶段不会出现故障或降级。但是，E型FM可能会在待机阶段在冷待机组件中发展，并导致组件性能下降。在本文中，我们提出了一种基于顺序二进制决策图（SBDD）的分层方法，在考虑FM的相关性和发展的同时，分析了不可修复的冷备用系统的可靠性。在案例研究中，对配备电子控制设备的示例电源子系统进行了可靠性分析，该电子控制设备包括一个主单元和一个冷备用单元。结果表明，在考虑冷备用单元中E型FM的发展时，冷备用系统的可靠性有很大差异。此外，在仿真中考虑E型FM时，系统的寿命将缩短。

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