【作者】 南英； 黄国强； 陆宇平； 龚平；

【Author】 Nan Ying、Huang Guoqiang、Lu Yuping、Gong Ping (School of Astronautics,Nanjing University Of Aeronautics and Astronautics, Nanjing,China,210016)

【机构】 南京航空航天大学航天学院；

【摘要】 针对深空探测4维飞行轨迹全局最优化设计,需要解决的问题是:从地球上发射一航天飞行器,采用微小推力太空变轨控制,该航天器与太阳系中1437颗行星流一起绕太阳飞行,轨迹优化的性能指标是:在10年内该航天器飞行交汇过的行星数最多,并最后与某一行星交汇;并变轨发动机的所消耗最小。本文给出了一套4维飞行轨迹全局最优化的组合算法,即动态规划+2点边值算法,规划出4维最优飞行轨迹,共交汇过55颗星,并先后跟随所交汇的一些行星飞行454天,并最后在时间60521(MJD)与星2005SN25交汇。更多还原

【Abstract】 Global 4-D trajectory is optimized for a spacecraft,which is launched from the Earth to fly around the Sun,just as star-drift of 1437 asteroids in solar system.The spacecraft trajectory is controlled by low thrust.The performance index of optimal trajectory is to maximize the rendezvous times with the intermediate asteroids,and also maximize the final mass.This paper provides a combined algorithm of global 4-D trajectory optimization. The algorithm is composed of dynamic programming and two-point-boundary algorithm based on optimal control theory.The best 4-D trajectory is obtained:the spacecraft flies passing 55 asteroids,and rendezvous(or follows or flyby again) asteroids 454 times,and finally rendezvous with the asteroid 2005SN25 on the day 60521(MJD),the final mass of the spacecraft is 836.53kg.更多还原