指挥信息系统任务自愈建模与仿真

摘要

The working environment of command and information system is complex and easily attacked,which makes the self-recovery and continuity of mission running very important.The mission was decomposed to application obj ect set using DAG. The system component model was built,and the shortest self-healing time was computed between candidate nodes and failed node.The synthesis function was defined to balance self-healing time and reliability.Simulation results show utilizing system re-source optimizing selection strategy proposed can obtain the best component,and keep mission continually running.%指挥信息系统运行环境复杂，易遭受摧毁，这使系统的自主恢复、不间断地保持任务运行变的非常重要。采用有向无环图将信息系统任务分解为应用程序对象集，利用无向图建立系统构件模型，计算得到每个候选节点至失效节点最短自愈时间，定义均衡自愈时间与可靠性的综合函数。仿真结果表明，承载任务的系统构件失效时，提出的面向任务自愈的系统资源优化选择策略能得到最优替换构件，有效地保证任务的持续运行。