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针对卫星测控中星务计算机切换与维护任务因时间同步数据现场加工、生成导致的人工操作复杂的问题,在分析星地时差的基础上,建立时间同步数据的生成块数与注入次数之和模型,并以此为目标函数,利用牛顿迭代法求解得到优化的生成数据块数,接着建立时间同步数据库,同时编写、调试遥控作业,用于星务计算机切换与维护,最后在多星监控平台进行验证。结果表明,星务计算机切换与维护的地面遥控作业自动化后,遥控作业运行时间小于4min,注入时间小于3.5min,全程无需手动操控,时间同步精度优于1ms,可应用于大数量卫星的长期管理与测控。
Aiming at the complex problem of manual operation caused by on-time processing and generation of satellite synchronous data in the task of switching and maintenance of satellite service in satellite measurement and control, the sum of the number of generated blocks and the number of injections of time synchronization data , And take this as an objective function, the optimal number of generated data blocks is obtained by Newton’s iterative method, then a time synchronization database is set up, remote control jobs are prepared and debugged, and the satellite computers are switched and maintained, and finally the multi-satellite monitoring platform verification. The results show that the operation time of the remote control is less than 4min and the injection time is less than 3.5min after the automation of the ground remote control operation of satellite computer switching and maintenance. The manual synchronization is not required in the whole process and the time synchronization accuracy is better than 1ms. It can be applied to the long-term management of a large number of satellites And monitoring and control.