关键词: 非支配排序遗传算法, 空间服务应急任务, 卫星星座优化, 机动变轨, 调相机动

Abstract: This paper gave a solution to emergency task in space. When the emergency task occurred, at first, the existing satellite constellation was used to cover the target locations and the coverage rate was computed. If the coverage performance did not meet the mission requirements, the Non-Dominated Sorting Genetic Algorithm Ⅱ （NSGA-Ⅱ） was used to optimize the layout of satellite constellation, i.e. optimizing the anomaly of each satellite in the constellation. Then the phase modulation maneuver was used to achieve constellation optimization results, i.e. maneuvering the satellites to the specified locations, and calculating maneuver time and energy of each satellite. Finally, an emergency task example and its solution process were provided, and the time and energy of the satellite orbit maneuver were calculated.

Key words: Non-Dominated Sorting Genetic Algorithm Ⅱ （NSGA-Ⅱ）, emergency tasks based on space services, satellite constellation optimization, orbit maneuver, phase modulation maneuver