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Reliability of demand-based phased-mission systems subject to fault level coverage

机译：基于需求的阶段性任务系统的可靠性受故障级别覆盖

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摘要

In many real-world applications, a mission may consist of several different tasks or phases that have to be accomplished in sequence. Such systems are referred to as phased-mission systems (PMS). In this paper we consider the demand-based PMS with parallel structure, where the system components function in parallel with different capacities in each phase of the mission and the mission is successful if and only if the total system capacity meets the predetermined mission demand in each phase. The reliability of the demand-based PMS (DB-PMS) with parallel structure subject to fault-level coverage (FIX) is first studied using a multi-valued decision diagram (MDD) based technique. The traditional MDD is modified to accommodate the FLC mechanism and new MDD construction and evaluation procedures are proposed for DB-PMS. To reduce the size of the MDD, an alternative construction procedure applying the branching truncation method and new reduction rules are further proposed. An upwards algorithm is put forward to evaluate the reliability of DB-PMS subject to FLC. The proposed approaches are illustrated through examples.
机译：在许多实际应用中，任务可能包含必须按顺序完成的几个不同的任务或阶段。这样的系统称为相控系统（PMS）。在本文中，我们考虑具有并行结构的基于需求的PMS，其中系统组件在任务的每个阶段以不同的容量并行运行，并且仅当总系统容量满足每个阶段中预定的任务需求时，任务才能成功相。首先使用基于多值决策图（MDD）的技术研究具有并行结构且受故障级别覆盖（FIX）的基于需求的PMS（DB-PMS）的可靠性。修改了传统的MDD以适应FLC机制，并为DB-PMS提出了新的MDD构建和评估程序。为了减小MDD的大小，进一步提出了采用分支截断方法和新的缩减规则的替代构造过程。提出了一种向上的算法来评估基于FLC的DB-PMS的可靠性。通过示例对提出的方法进行了说明。

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