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嫦娥二号卫星圆满完成了工程任务后,又取得了各项拓展任务的成功,并于2012年12月13日成功与4179小行星交会并成像探测.本文针对嫦娥二号卫星拓展任务需求,介绍了推进系统研制过程中的相关关键技术,深入分析了推进系统有力支持嫦娥二号卫星拓展任务的各个关键方面,主要包括气路系统及490N发动机的长寿命工作、轨控推力准确预估和控制技术以及推进剂剩余量精确计算.
After successful completion of the engineering task, Chang’e II satellite achieved the success of various expansion missions and succeeded in the intersection with 4179 asteroid on December 13, 2012 and imaging exploration.In this paper, according to the requirements of Chang’e II satellite expansion mission, In order to promote the key technology in the process of system development, the key aspects of the propulsion system supporting the Chang’e II satellite’s expanding mission are analyzed in depth. These include the long-life work of the pneumatic system and the 490N engine, the accurate prediction and control of the rail-controlled thrust Technical and Propellant Residues Accurately Calculated.