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桂明臻, 宁晓琳, 马辛, 叶文. 一种快速星光角距/时间延迟量测组合导航方法[J]. 深空探测学报(中英文), 2021, 8(2): 190-197. DOI: 10.15982/j.issn.2096-9287.2021.20200080
引用本文: 桂明臻, 宁晓琳, 马辛, 叶文. 一种快速星光角距/时间延迟量测组合导航方法[J]. 深空探测学报(中英文), 2021, 8(2): 190-197. DOI: 10.15982/j.issn.2096-9287.2021.20200080
GUI Mingzhen, NING Xiaolin, MA Xin, YE Wen. A Fast Star Angle/Time Delay Measurement Integrated Navigation Method[J]. Journal of Deep Space Exploration, 2021, 8(2): 190-197. DOI: 10.15982/j.issn.2096-9287.2021.20200080
Citation: GUI Mingzhen, NING Xiaolin, MA Xin, YE Wen. A Fast Star Angle/Time Delay Measurement Integrated Navigation Method[J]. Journal of Deep Space Exploration, 2021, 8(2): 190-197. DOI: 10.15982/j.issn.2096-9287.2021.20200080

一种快速星光角距/时间延迟量测组合导航方法

A Fast Star Angle/Time Delay Measurement Integrated Navigation Method

  • 摘要: 基于太阳震荡的时间延迟是一种新型天文导航量测量,将其与星光角距量测量结合,可以提高导航性能。然而,火卫一的星历误差将降低导航精度。针对这一问题,提出了一种快速星光角距/时间延迟量测组合导航方法,在线估计火卫一的位置和速度,抑制火卫一星历误差对星光角距/时间延迟量测组合导航估计精度的影响,并引入事件触发机制,通过设定阈值对新息(innovation)的幅值进行检验,选择性地进行基于时间延迟的隐式无迹卡尔曼滤波。仿真结果表明,提出的方法可以在保证导航精度的前提下,比在线估计运行的天文测角/时间延迟量测组合导航方法耗时减少约90%,有效提高了导航实时性,可为火星导航提供技术支持。

     

    Abstract: The time delay based on solar oscillation is a new type of celestial navigation measurement. Combined with the star angle measurement, it can improve the navigation performance. However, the ephemeris error of Phobos will reduce the navigation accuracy. To solve this problem, a fast star angle/time delay measurement integrated navigation method is proposed. The position and velocity of Phobos are estimated online to suppress the effect of Phobos ephemeris error on the estimation accuracy of star angle/time delay measurement integrated navigation. The amplitude of the innovation is tested by setting a threshold, and the implicit unscented Kalman filter based on time delay measurement is selectively performed, which greatly improves the real-time performance of navigation. Simulation results show that the proposed method can significantly improve the real-time performance of navigation while ensuring navigation accuracy.

     

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