摘要
针对载人返回舱着陆段使用反推发动机定点着陆问题,基于自适应伪谱法和滑模控制理论提出一种轨迹跟踪制导方案,以同时实现着陆段姿态和轨迹跟踪。首先建立着陆段动力学模型,然后以燃耗最优为目标,使用自适应伪谱法获得着陆段姿态和轨迹指令,其次采用滑模控制理论设计了轨迹跟踪制导方法,实现着陆段轨迹跟踪控制,最后采用数值仿真验证了方法的有效性。仿真结果表明:所提方法的燃料消耗和着陆精度均满足反推着陆任务的要求,可为载人飞船反推着陆方案的实施提供有益参考。
To perform the precise powered landing of crew return capsule using retro-rocket,a trajectory tracking guidance approach based on adaptive pseudo-spectral method and sliding mode control theory was proposed,and simultaneous tracking of the command attitude and trajectory in landing phase was realized.First,the landing dynamics of crew return capsule was established,and the propellant-optimal attitude and trajectory commands were obtained using the adaptive pseudo-spectral method.Then,the guidance method based on sliding mode control theory was designed to track the command profile.In the end,the effectiveness of proposed approach was demonstrated by the numerical simulation.The simulation results showed that the fuel consumption and guidance accuracy of the proposed method could meet the requirements of the powered landing mission.It may sever as a useful reference for the implementation of future manned spacecraft powered landing.
作者
刘旭
胥彪
曹涛
李爽
宋婷
LIU Xu;XU Biao;CAO Tao;LI Shuang;SONG Ting(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Shanghai Aerospace Control Technology Institute,Shanghai 201109,China)
出处
《载人航天》
CSCD
北大核心
2020年第4期477-484,共8页
Manned Spaceflight
基金
载人航天预先研究项目(060101)。
关键词
载人返回舱
反推着陆
轨迹跟踪制导
自适应伪谱法
滑模控制
crew return capsule
powered landing
trajectory tracking guidance
adaptive pseudo-spectral method
sliding mode control
