Explicit and implicit Valuation-Based System methods for the risk assessment of systems subject to common-cause failures under uncertainty

Explicit and implicit Valuation-Based System methods for the risk assessment of systems subject to common-cause failures under uncertainty
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用于对不确定性下发生共因故障的系统进行风险评估的显式和隐式基于评估的系统方法

DOI:
10.1016/j.knosys.2020.106665
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发表时间:
2021
影响因子:
8.8
通讯作者:
Ming Xinguo
Ming Xinguo
中科院分区:
计算机科学1区
文献类型:
--
作者:
Qiu Siqi;Ming Xinguo

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系统内的多个组件可能由于共享原因或共同原因(CC)而同时失效或故障。这种故障被称为共因故障(CCF),它对系统故障的贡献很大。由于相关数据的不足和系统的复杂性,在实际系统建模中不可避免地存在各种不确定性。本文提出了显式和隐式的基于价值的系统(VBS)的方法来建模系统的CCF,并评估这样的系统的故障概率,考虑到参数的不确定性相关的组件的状态概率和模型的不确定性相关的系统结构。这两种方法都适用于在不同的不确定性条件下对具有控制变量的系统进行建模,并且允许多个控制变量之间的关系为s独立、s相关或互斥。最后,将所提出的方法应用于危险品运输事故建模,并利用统计数据对事故发生概率进行评估。
Multiple components within a system may fail or malfunction simultaneously due to a shared cause or common cause (CC). This kind of failure is referred to as a common-cause failure (CCF), and it contributes greatly to the system failure. Due to the insufficiency of relative data and system complexities, different kinds of uncertainties inevitably exist in real-world system modeling. This paper proposes explicit and implicit Valuation-Based System (VBS) methods to model systems subject to CCFs, and to evaluate the failure probability of such systems considering the parametric uncertainty related to state probabilities of components and the model uncertainty related to the system structure. Both methods are suitable to model systems subject to CCFs under different kinds of uncertainties, and allow the relationship among multiple CCs being s-independent, s-dependent or mutually exclusive. Finally, the proposed methods are applied to model hazardous material transportation accidents and to evaluate the occurrence probability of accidents using statistical data.
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