航天任务系统仿真框架中的HLA时间管理

Application of HLA Time Management in Space Mission Simulation Framework

为了实现航天任务系统仿真框架中各组件的时间同步和组件间的协调数据通讯,分析了时间管理的特点和目标,设计了具有良好兼容性的时间同步管理策略。该策略运用事件驱动技术实现了时间步长在联邦范围内的动态选择,以多种推进服务组合的方式完成了组件间的时间同步和有序数据交换,并用petri网给出了联邦成员的推进逻辑图。分析表明,该策略实现了仿真组件时间同步策略的统一性和兼容性,促进了仿真组件的重用,在保证仿真逻辑正确的同时实现了系统的高效推进,对其它类似的分析仿真系统的时间管理具有一定的借鉴意义。

Aiming at applying time synchronization and data interaction between components of space mission simulation framework, a time synchronization strategy was designed based on high level architecture （HLA）. The strategy achieved a self-adjusted selection of time steps by using event driven simulation technology, and compounded different time advancing services to achieve logical time synchronization and simulation data interaction between federates. Analysis shows that this strategy unifies the time management across the components within the framework, realizes compatibility of components across federation, and improves the reusability of components. The strategy satisfies the space mission simulation framework effectively, and also can be used as an example of time management for other similar analysis simulation systems.