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Posbist fault tree analysis of coherent systems

机译：相干系统的Posbist故障树分析

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摘要

When the failure probability of a system is extremely small or necessary statistical data from the system is scarce, it is very difficult or impossible to evaluate its reliability and safety with conventional fault tree analysis (FTA) techniques. New techniques are needed to predict and diagnose such a system's failures and evaluate its reliability and safety. In this paper, we first provide a concise overview of FTA. Then, based on the posbist reliability theory, event failure behavior is characterized in the context of possibility measures and the structure function of the posbist fault tree of a coherent system is defined. In addition, we define the AND operator and the OR operator based on the minimal cut of a posbist fault tree. Finally, a model of posbist fault tree analysis (posbist FTA) of coherent systems is presented. The use of the model for quantitative analysis is demonstrated with a real-life safety system.
机译：当系统的故障概率极小或缺少系统的必要统计数据时，使用传统的故障树分析（FTA）技术很难或不可能评估其可靠性和安全性。需要新技术来预测和诊断此类系统的故障并评估其可靠性和安全性。在本文中，我们首先提供FTA的简要概述。然后，基于posbist可靠性理论，在可能性测度的背景下表征了事件失效行为，并定义了相干系统posbist故障树的结构函数。另外，我们基于最小概率故障树的最小割定义了AND运算符和OR运算符。最后，提出了一种相干系统的posbist故障树分析模型（posbist FTA）。真实的安全系统演示了该模型在定量分析中的使用。

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