系统在可变条件下运行的可靠性评估

Huamin Liu, V. Makis, A. Jardine
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引用次数: 2

摘要

系统的运行条件对系统的性能和可靠性有很大的影响。然而,现有的可靠性模型无法计算系统在变工况下的可靠性。本文提出了解决这一问题的一种新方法,并讨论了两种典型情况:一项在不同条件下顺序运行,其中过渡点是确定的;由两个共享负载的并行子系统组成的系统,其中每个子系统的故障率取决于其共享的负载。结果表明,如果项目(或子系统)的底层故障时间分布可以用加速故障时间模型(AFTM)表示,则利用本文导出的公式可以很容易地获得系统在任何时刻的可靠度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reliability assessment of systems operating in variable conditions
The performance and reliability of a system are strongly influenced by its operating conditions. However, existing reliability models are unable to calculate the reliability of a system operating in variable conditions. The paper presents a new approach to this problem and discusses two typical cases: one item operating sequentially under different conditions, where the transition points are deterministic; a system consisting of two parallel subsystems sharing a load, where the failure rate of each subsystem is dependent on the load it shares. We show that if the underlying failure time distribution of the item (or subsystem) can be represented by the accelerated failure time model (AFTM), the system reliability at any time can be obtained easily by using the formulas derived in the paper.
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