The invention provides a composite planning method for a three-dimensional reentry trajectory of a spacecraft, and the method comprises the steps: analyzing a three-degree-of-freedom model of a spacecraft in reentry motion, and obtaining a longitudinal plane model and a transverse plane model; optimizing the track of the longitudinal plane; uniformly dividing the whole flight time domain, and calculating the variation of the horizontal distance in the period; planning the track of the transverse plane; carrying out smoothing processing on a transverse track connection part of adjacent time periods; reversely calculating the change rule of the trajectory deflection angle along with time according to the latitude and longitude relationship of the transverse trajectory; and planning the three-dimensional reentry trajectory of the spacecraft according to all the state quantities and the control quantities. According to the method, the reentry reliability of the spacecraft can be effectively improved, the problems of poor convergence and low terminal precision of solving a complex nonlinear problem in a traditional gradient algorithm are solved, and meanwhile, the problems of dependence of a dynamic planning method on an initial value and large calculation amount are avoided.

    本发明提出了一种面向航天器三维再入轨迹的复合规划方法,包括:分析再入运动的航天器的三自由度模型,获得纵向平面和横向平面的模型;对纵向平面的轨迹进行优化;将整个飞行时间域均匀划分,并计算周期内水平距离的变化量;对横向平面的轨迹进行规划;对相邻时间周期的横向轨迹连接处进行平滑化处理;通过横向轨迹的经纬度关系反向解算轨迹偏角随时间的变化规律;根据全部状态量和控制量,对所述航天器的三维再入轨迹进行规划。本方法能够有效提高航天器再入的可靠性,解决传统梯度算法中求解复杂非线性问题收敛性差、终端精度低的问题,同时避免了动态规划法对初值的依赖以及计算量大的问题。


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    Title :

    Composite planning method for three-dimensional reentry trajectory of spacecraft


    Additional title:

    一种面向航天器三维再入轨迹的复合规划方法


    Contributors:
    HE MINGYONG (author) / NAN YING (author) / SU SHI (author) / ZHANG SHAOLIANG (author) / LI ZHIHAN (author) / YU GUOCHUAN (author)

    Publication date :

    2024-07-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64G Raumfahrt , COSMONAUTICS




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