奔月转移轨道的快速设计方法研究

Study of Rapid Design Method for Cislunar Transfer Trajectory

结合重叠圆锥曲线方法 ,针对着陆型和月球卫星型两种类型奔月转移轨道 ,给出了一种奔月转移轨道的快速设计方法。该方法是一种无需轨道数值积分的纯代数计算方法 ,直接从目标轨道参数出发 ,具有计算速度快、精度高的特点 ,避免了圆锥曲线拼接法精度差的缺点 ,可用于这两类奔月转移轨道的初始设计。该方法可为精确轨道计算提供较好的初值 ,大大缩短了轨道精确计算所需的时间。同时还针对地球扁率 (J2 )的影响 ,给出了一种修正方法 。

Based on the overlapped-conic targeting method, a fast design method for lunar satellite and lunar lander transfer trajectories was presented. This method is a pure algebraic algorithm without any numerical integration, which has an advantage of rapidity and high accuracy and is suitable for the preliminary design of earth-moon transfer trajectories. This method can also provide good initial guess value for precise orbital calculation and greatly reduce the time for calculating precise transfer trajectories. According to the effects of earth oblateness on the cislunar transfer trajectory, this paper presents a method of correcting the earth oblateness. The result proves that it can greatly improve the accuracy of the method for rapid design.