嫦娥四号探测器推进系统设计特点与验证

Design Characteristic and Verification of Propulsion System of Chang’e-4 Probe

嫦娥四号探测器推进系统在充分继承嫦娥三号探测器的技术方案基础上,在发动机精确控制和高精度变推力、轨道控制管路超压管理、月面高可靠推进剂钝化、气瓶在轨提高裕度和发动机量化极性测试方面进行了优化设计,并通过了地面试验和在轨飞行试验的充分验证.结果表明:嫦娥四号探测器推进系统完成了在轨飞行全部姿态控制和轨道控制任务,取得的发动机推力精确控制和高精度变推力等技术成果可应用于其他探测器.

On the basis of inheriting the technical scheme of propulsion system of Chang’e—3 probe,the propulsion system of Chang’e—4 probe has been optimized in terms of precise thrust control of engine and high precision variable thrust design,overpressure management design of orbit control lines,reliable design for venting of residual propellant,enhanced redundancy design of helium storage tanks in flight and quantitative polarity test design of engine.The optimized de—sign has been fully verified through ground test and flight experience.The flight experience indi—cates that the propulsion system of Chang’e—4 probe has fulfilled all tasks of attitude control and orbit control,and the technical achievements such as precise thrust control of engine and high precision variable thrust design can be applied to other space probes.