“嫦娥4号”中继星应急轨道控制策略设计与分析

"嫦娥4号"中继星作为"嫦娥4号"任务的重要组成部分,不同于其它月球探测器,首次选择绕地月L2平动点运行的Halo轨道以保证为月球背面的着陆器和巡视器提供连续的中继通信服务,这面临诸多技术挑战。基于任务需求和工程约束,梳理了中继星全寿命与轨道控制相关的故障类型,制定了多级应急控制目标,给出了分阶段应急轨道控制方案,提出将Lissajous轨道作为应急备选使命轨道,分析了推进剂消耗、中继测控条件和可行性,研究成果直接应用于中继星任务工程实践。

Emergent Orbit Maneuver Strategies Design of Chang'E-4 Relay Satellite

Chang''E-4 relay satellite,as an important part of Chang''E-4 mission,is different from other lunar probes. For the first time,it chooses Halo orbit around earth-moon L2 point to provide relay communication support for the lander and the rover on the lunar far side. There are many technical challenges have to be faced. Based on mission requirements and engineering constraints, the fault types related to orbit control in the whole life of the satellite are identified and three emergency control objectives are determined firstly, and then the emergency orbit control schemes are given in stages, and the lissajous orbit is proposed as an alternative mission orbit. Finally the propellant consumption, relay communication conditions and feasibility are analyzed finally. Research results have been applied directly to engineering practice.