对地观测卫星有限推力快速轨道机动优化方法  

Optimization method of finite thrust emergency orbit maneuver for an earth observation satellite

作　　者：余培军[1] 王维 李建成 

机构地区：[1]西北工业大学航天学院,西安710072 [2]宇航动力学国家重点实验室,西安710043

出　　处：《北京航空航天大学学报》2011年第7期757-761,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：研究了对地观测卫星在有限推力作用下,快速轨道机动到目标区域上空的优化算法.分析了任务需求并选取两次点火的变轨方法,使算法更具普适性.推导出考虑J2摄动的三维空间的有限推力动力学方程.使用Lambert方法确定有限推力时间变量的取值范围,并在此基础上使用遗传算法进行优化,最终得到时间最优意义的优化结果.通过一个算例对整个优化算法做了验证.结果表明该算法精度高、计算时间短,适用于快速轨道机动任务.The optimal emergency orbit maneuver method for an earth observation satellite was studied,which uses the finite thrust model.The mission requirement of the emergency orbit maneuver was investigated firstly.A twice orbital maneuver technique was adequately chosen to make the algorithm universal.The finite thrust dynamic equation in the three-dimensional space that considering the J2 perturbation was derived.The time variable＇s span was given by solving the Lambert＇s problem.The genetic algorithm was used as the optimization method to get a time optimal result.An emulation example was given to verify the method.The result shows the method has a high precise and can be get in a short time so it is available for the emergency orbit maneuver mission.

关 键 词：快速轨道机动 有限推力 Lambert算法 遗传算法 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]