基于虚拟落点策略的月球返回飞船再入制导方法  

Lunar Return Entry Guidance Based on Virtual Landing Point Strategy

作　　者：赵彪[1] 崔乃刚[1] 郭继峰[1] 王平[2] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001 [2]中国空间技术研究院载人航天总体部,北京100094

出　　处：《宇航学报》2013年第2期170-178,共9页Journal of Astronautics

基　　金：哈工大航空宇航博士点人才培养与创新研究专项基金(2010B918022)

摘　　要：针对长航程大偏差状况下阿波罗再入制导算法的精度退化问题提出改进,采用数值预测-校正方法规划和调制线性参数化的倾侧角剖面,给出了一种在全航程包络内适用的月球返回飞船再入制导方法。引入虚拟落点策略,在一次再入段利用算法预测能力预测二次再入段初始侧向偏差并进行前馈补偿,给出了简便有效的虚拟落点瞄准程序。大偏差任务想定下的蒙特卡洛仿真分析表明,该算法在3000km到10000km的再入航程范围内,能够确保偏差小于3km的落点精度。An adaptive skip entry guidance algorithm for vehicles with low lift-to-drag ratios is presented.The algorithm is based on the Apollo entry guidance algorithm and upgraded by using numeric predictor-corrector in planning and modulating the linear parameterized bank angle profile.Based on the virtual landing point strategy,a simple and effective bias targeting feed forward procedure is developed for precision landing in large entry range case.The upgraded algorithm is tested against various entry scenarios including perturbations in initial entry conditions as well as extensive dispersion in vehicle mass,aerodynamic properties,and atmospheric density.The algorithm is shown to be sufficiently robust and general enough to allow precision landing with a delivery error of less than 3km in the entire range between 3000km and 10000km.

关 键 词：月球返回 跳跃再入 轨迹规划 再入制导 虚拟落点 

分 类 号：V488.2[航空宇航科学技术]