基于组合导航的月面起飞自主对准技术

Initial Alignment Calibration Off the Lunar Surface Based on Combination Navigation

针对载人登月返回任务中月面起飞过程中的自主对准问题,采用星间链路、天文观测以及惯性测量的组合方法,进行非线性状态估计(二阶分离插值滤波—DDF2算法)以获得高精度着陆器的位置,并利用获得的位置信息对惯性导航进行修正,以消除惯性导航过程中产生的积累误差。仿真结果表明,该组合导航方法能够提供高精度的自主定位,为月面起飞提供可靠性保障。

This paper aim at the initial alignment calibration off the Lunar surface , using combina-tion of satellite link, astronomical observation and initial device to nonlinear estate estimate , then a-chieve high precision position of Lunar lander , and using position information to correction initial navigation .The result suggest that the combination navigation could raise the precision of self-orien-tation, and provide reliability guarantee to lift off from Lunar surface .