考虑星历误差的天文测角/时间延迟量测组合导航方法  

Celestial Star Angle/Time Delay Measurement Integrated Navigation Method Considering Ephemeris Error

作　　者：桂明臻 宁晓琳[2] 芦佳振 魏才盛 GUI Mingzhen;NING Xiaolin;LU Jiazhen;WEI Caisheng(School of Aeronautics and Astronautics,Central South University,Changsha 410083;School of Instrumentation Science&Opto-electronics Engineering,Beihang University,Beijing 100191)

机构地区：[1]中南大学航空航天学院,长沙410083 [2]北京航空航天大学仪器科学与光电工程学院,北京100191

出　　处：《飞控与探测》2020年第4期24-32,I0003,共10页Flight Control & Detection

基　　金：国家自然科学基金项目(61722301)。

摘　　要：基于太阳振荡的时间延迟是一种新型天文导航量测量,可以提供探测器相对反射天体的距离信息,与星光角距量测量结合,可以提高导航性能。然而,星光角距量测模型与时间延迟量测模型均含有火卫一相对火星的位置矢量,火卫一的星历误差将影响导航精度。针对这一问题,提出了一种基于在线估计的天文测角/时间延迟量测组合导航方法,建立了包含火卫一位置及速度的状态模型,利用星光角距及时间延迟量测量同时对火卫一的位置和速度进行在线估计。仿真结果表明,提出的方法可以有效抑制火卫一星历误差对组合导航精度的影响,为探测器提供高精度的自主导航信息。The time delay based on solar oscillation is a new type of celestial navigation measurement,which can provide the distance information of the spacecraft relative to the reflected celestial body.Combined with the star angle measurement,it can improve the navigation performance.However,both the measurement model of star angle and the measurement model of time delay contain the position vector of Phobos relative to Mars.The ephemeris error of Phobos will affect the navigation accuracy.To solve this problem,a celestial star angle/time delay measurement integrated navigation method based on online estimation is proposed,and a state model including Phobos position and velocity is established.The star angle and time delay measurement are used to simultaneously estimate the position and velocity of Phobos.The simulation results show that the proposed method can effectively suppress the influence of the ephemeris error of Phobos on the integrated navigation accuracy,and provide high-precision autonomous navigation information for the spacecraft.

关 键 词：深空探测 天文导航 组合导航 时间延迟量测 星历误差 

分 类 号：V448.224[航空宇航科学与技术—飞行器设计]