考虑环月交会约束的地月转移轨道设计

In order to meet the needs of manned lunar landing mission，the design problems of Earth-Moon transfer orbit and parking orbit around the Moon are studied. The rendezvous orbit is designed based on the landing location and landing duration. Then the influence of the perturbation force on the parking orbit is analyzed and the shifting features of the Keplerian orbit element according to time and other factors are achieved. These features are used as constraints in both Earth-Moon transfer orbits and parking orbits designs，and further maneuvers for rendezvous are designed. Thus，an integrated design method for transfer，parking，and rendezvous orbits is achieved，and based on the method，the time window of the lander’s Earth-Moon transfer is analyzed. Transfer orbit and long time parking orbit can be designed simultaneously by this method，and time window for transfer orbit can be searched among long time period. The simulation results have verified that the integrated orbit design method can provide orbits satisfies both transfer constraints and rendezvous constraints.