The invention discloses a small celestial body surface movement track robust optimization method, and belongs to the technical field of deep space exploration. The implementation method comprises thefollowing steps: establishing a kinetic equation of bounce movement of a detector; considering the initial state deviation and gravitational acceleration deviation of the detector, and establishing acovariance matrix of the bounce movement distance of the detector and the position component of the detector in the Y-axis direction; giving an index J1 considering the influence of the initial statedeviation and gravitational acceleration deviation of the detector on the bounce movement track based on the established covariance matrix; meanwhile, giving an energy consumption index J2; integrating the index J1 and the index J2, giving comprehensive energy consumption, and considering the index J3 of the influence of the initial state deviation and gravitational acceleration deviation of the detector on the bounce movement track; and substituting the detector take-off angles obtained by the optimization indexes J1, J2 and J3 into the kinetic equation to obtain corresponding optimized bounce movement tracks. The method improves robust optimization of the bounce movement tracks of the detector on the surface of the small celestial body, and improves the position precision of bounce movement of the detector.
本发明公开的小天体表面移动轨迹抗差优化方法,属于深空探测技术领域。本发明实现方法如下:建立探测器弹跳移动的动力学方程;考虑探测器初始状态偏差和引力加速度偏差,建立探测器弹跳移动距离与探测器在Y轴方向上的位置分量的协方差矩阵;基于建立的协方差矩阵,给出考虑探测器初始状态偏差和引力加速度偏差对弹跳移动轨迹影响的指标J;同时,给出能耗指标J;综合指标J和指标J,给出综合能耗、考虑探测器初始状态偏差和引力加速度偏差对弹跳移动轨迹影响的指标J;分别将优化指标J、指标J、指标J得到的探测器起跳角代入动力学方程,得到对应的优化弹跳移动轨迹,实现探测器在小天体表面弹跳移动轨迹的抗差优化,提高探测器弹跳移动的位置精度。
Small celestial body surface movement track robust optimization method
小天体表面移动轨迹抗差优化方法
2020-07-03
Patent
Electronic Resource
Chinese
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