Article

A Fast Star Angle/Time Delay Measurement Integrated Navigation Method

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  • 1. School of Aeronautics and Astronautics,Central South University,Changsha 410083,China;
    2. School of Instrumentation Science & Opto-electronics Engineering,Beihang University,Beijing 100191,China;
    3. Division of mechanics and acoustics,National Institute of Metrology,Beijing 100029,China

Received date: 21 Nov 2020

Revised date: 29 Dec 2020

Published date: 20 Apr 2021

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.

Cite this article

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

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