利用规避机动的月球返回拓展任务转移轨道设计方法

In order to improve the flexibility of transfer trajectory design for extended lunar return missions, a constraint-free design model for Lunar return avoidance maneuver is constructed, and a transfer trajectory design method for extended Lunar return missions using avoidance maneuver is developed accordingly. First, three cases of safety constraints after the avoidance maneuver are discussed, and an adaptive control technique for the avoidance altitude is developed, which realizes the analytical calculation of the in-plane avoidance maneuver that satisfies the safety requirements without introducing any constraint. Then, the mapping between the avoidance maneuver and the parameters of the transfer trajectory is derived. A rotating plane-based avoidance maneuver design method is proposed to realize the mapping between the avoidance maneuver and the subsequent transfer trajectory, and the constraint-free design model of the Lunar return avoidance maneuver is established accordingly. Finally, the orbital geometry and fuel consumption characteristics of the avoidance maneuver are analyzed. The transfer trajectory design models of the Lunar return expansion mission are constructed with the DRO and the asteroid as the targets. Numerical simulation results show that the proposed transfer trajectory design method has a powerful optimization capability and can support the transfer trajectory design for different exploration targets.