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基于对任务的弧段划分,建立了测控通信任务的可靠性模型.根据任务执行时序图,参与任务的测控通信资源及任务成败标准,将测控通信任务划分为不同的任务弧段,定义了正常任务弧段和空闲任务弧段,基于Markov过程,提出了正常任务弧段和空闲任务弧段的可靠性建模方法.提出了在考虑测控通信资源的开机准备时间和停机时间的情况下的可靠性建模方法,对测控通信任务重新划分任务弧段,各任务弧段依据相应方法单独建立模型,依次求解各模型可得整个任务的可靠性.最后以具体的测控通信任务为例,计算并分析了不考虑资源开机准备时间和停机时间、仅考虑资源开机准备时间、仅考虑资源停机时间以及考虑资源开机准备时间和停机时间的任务可靠性,验证了模型的正确性.
Based on the division of arcs, the reliability model of the measurement and control communication task is established.According to the task execution timing diagram, the measurement and control communication resources involved in the task and the criteria of success or failure, the measurement and control communication task is divided into different task arcs, Task arcs and idle task arcs, a method of reliability modeling of normal task arcs and idle task arcs is proposed based on Markov process, and a new method of reliability analysis based on Markov process is put forward, considering the preparation time and downtime of the measurement and control communication resources And then establish the model of each task arc separately according to the corresponding method to solve the reliability of the whole task in turn.At last take the concrete measurement and control communication task as an example, The paper analyzes the resource preparation time and downtime, and considers only the resources preparation time, only considers the resource downtime and the task reliability considering the resources preparation time and downtime, and verifies the correctness of the model.