The invention discloses an extraterrestrial celestial body soft landing augmented curvature guidance method, and belongs to the technical field of deep space exploration. The implementation method comprises the following steps: establishing a kinetic equation of the detector under a planetary surface fixed connection coordinate system; and according to a track geometric curvature theory, in combination with an energy optimal guidance law, a basic form for constructing track curvature guidance is established, and an expansion form of curvature guidance is obtained through derivation. In the trajectory curvature guidance law, whether a detector is in an obstacle influence area or not and compensation thrust applied to the obstacle influence area are represented through a thrust compensation item, the extraterrestrial celestial body soft landing augmented curvature guidance law is obtained, the compensation thrust only acts on a certain space area near a terrain obstacle, and energy consumption is closer to an energy optimal guidance law. The solved acceleration is used for conducting guidance of soft landing of the extraterrestrial celestial body, the relative height of the detector facing the surface obstacle is further increased, and then the obstacle avoidance capacity of the detector facing the surface obstacle is improved. The method also has the advantage of high real-time performance.
本发明公开的地外天体软着陆增广曲率制导方法,属于深空探测技术领域。本发明实现方法为:建立探测器在行星表面固连坐标系下的动力学方程。根据轨迹几何曲率理论,结合能量最优制导律,建立构建轨迹曲率制导的基本形式并推导得到曲率制导的拓展形式。在轨迹曲率制导律中,通过推力补偿项表征探测器是否在障碍影响区域以及施加在障碍影响区域的补偿推力,得到地外天体软着陆增广曲率制导律,补偿推力仅作用于地形障碍附近一定空间区域,能耗更接近能量最优制导律。利用求取的加速度进行地外天体软着陆的制导,进一步提升探测器面对地表障碍时的相对高度,进而提升探测器面对地表障碍的避障能力。本发明还具有实时性高的优点。
Extraterrestrial celestial body soft landing augmented curvature guidance method
地外天体软着陆增广曲率制导方法
2023-06-23
Patent
Electronic Resource
Chinese
IPC: | B64G Raumfahrt , COSMONAUTICS |
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