长征五号运载火箭探火轨道高精度制导技术

High Precision Guidance Technology for Earth Mars Transfer Orbit of Long March 5 Launch Vehicle

长征五号火箭发射天问一号探测器进入地火转移轨道(探火轨道),是中国航天60年来首次冲出地球束缚、奔向火星。针对长征五号运载火箭将有效载荷送入地火转移轨道的适应性难题,提出了一种适应探火轨道的高精度制导技术,并给出了制导设计方案及相应的仿真结果。长征五号火箭探火轨道高精度制导技术实现了火星探测器的高精度入轨,入轨指标达到了工程任务要求的百分之三的量级,标志着中国火箭具备执行地外行星探测任务的能力。

Long March 5 launch vehicle(LM-5)launched the‘TianWen-1’Mars probe into the Earth Mars transfer orbit(EMTO),which is hyperbolic orbit.This is the first time that China Aerospace has broken out of the earth’s restraints and rushed to Mars in 60 years.Aiming at the adaptability problem of LM-5 sending the payload into EMTO,A high-precision guidance technology(HPGT)suitable for sending payloads into EMTO is proposed,and the guidance design scheme and corresponding simulation results are given.The HPGT of the LM-5 for EMTO has achieved the high orbital accuracy of the mars probe into the hyperbolic orbit,and the orbit index has reached the order of 3%of the task requirements,which indicates that Chinese rockets have the ability to perform missions of extraterrestrial planetary exploration.