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针对航天测控系统任务可靠性分析问题,提出了基于二值决策图(BDD)的航天测控系统任务可靠性分析模型和算法。将航天测控系统视为一个多阶段任务系统,采用任务剖面描述任务时序逻辑关系。根据各阶段的可靠性逻辑结构建立了单阶段的BDD,依次对各阶段的BDD进行运算得到系统的BDD,据此计算系统的可靠度。最后给出了一个算例,验证了算法的有效性。
Aiming at the problem of mission reliability analysis of aerospace measurement and control system, a task reliability analysis model and algorithm of aerospace measurement and control system based on binary decision diagram (BDD) is proposed. The space flight measurement and control system is regarded as a multi-stage mission system, and mission profiles are used to describe the task sequence logic. Based on the reliability logic structure of each stage, a single-stage BDD is established, and the BDDs of all stages are sequentially processed to obtain the BDD of the system, and the reliability of the system is calculated accordingly. Finally, an example is given to verify the effectiveness of the algorithm.