基于离散事件仿真的多状态多阶段任务系统可靠性分析

摘要

An algorithm of phased-mission system with multiple states is presented.The concepts of phased-mission system and its features are discussed,and an active standby (AS) tree structure method is proposed to depict the system structure of each phase.The behaviors of phased-mission system with multiple states are discussed based on state chart.According to discrete event simulation concept,a simulation algorithm is presented to estimate the reliability parameters of phased-mission system with multiple states.A case-study is introduced to verify the algorithm.The proposed simulation algorithm is very practical and versatile.The algorithm can be used to describe the complex behaviors of phased-mission system flexibly and obtain the more reliability parameters to understand the system operation.%介绍了多状态多任务系统可靠性参数的离散事件仿真算法.对多阶段任务系统及其特点进行了分析,提出了利用表决冷储备(AS)树描述多阶段任务系统每个阶段的逻辑结构关系.利用状态图分析了多状态多阶段任务系统的行为.依据离散事件仿真思想,分别给出了多状态多阶段任务系统的仿真算法,具体介绍了算法的假设条件、输入参数、输出参数、算法框架、如何描述AS树、如何确定系统状态、如何确定单元转移状态.给出了计算实例,验证了该算法的正确性和有效性.该仿真算法可以很好地描述多阶段任务系统复杂行为,可以获得多种了解系统运行规律的可靠性参数,具有很强的通用性与实用性.