双月旁转向周期轨道的机理分析与设计仿真

Analysis and Simulation of Double Lunar-swingby Periodic Trajectory

双月旁转向周期轨道是日-地-月空间系统的大尺度轨道,在深空探测中应用潜力巨大。首先,给出了双月旁转向周期轨道的形成机理,分析了航天器地心椭圆轨道拱线在惯性空间中旋转的原因。其次,基于圆锥曲线拼接法进行了双月转向周期轨道初步设计,并给出了基于圆型限制性三体模型的轨道修正方法,形成了一套有效的轨道设计流程,为其在深空探测中的应用提供了一定的参考。最后,选择了典型轨道进行仿真验算,并对设计结果进行了对比分析,结果表明"圆锥曲线拼接法"与"数值积分修正"相结合的轨道设计思路是可行的。

Double Lunar-Swingby（DLS） periodic trajectory is a kind of large-scale orbit in the Sun-Earth-Moon system. It has a tremendous potential in deep-space exploration. First, the principia of DLS trajectory was researched, and the apsidal rotating of an elliptical earth orbit in inertial frame was discussed. Second, a preliminary design of DLS trajectory was performed based on the Patched Conic method. Then the Circular Restricted Three-Body Problem model was used to correct the approximation of the Patched Conic analysis. An effective orbit design procedure was obtained, which provided referance for the deep-space exploration. Finally, several typical trajectories were selected for the orbit design. Compared between the initial and modification value, the results show that the Patched Conic method combined with numerical integration is feasible for the design of DLS trajectory.