| 考虑太阳自转的天文多普勒差分导航方法 |
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| 作者姓名： | 刘 劲 汪 婷 胡 爽 宁晓琳 康志伟 |
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| 作者单位： | 武汉科技大学 信息科学与工程学院;北京航空航天大学 仪器科学与光电工程学院;湖南大学 信息科学与工程学院 |
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| 基金项目： | 国家自然科学基金项目（61722301） |
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| 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，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。
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| 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 |
Celestial Doppler Difference Navigation Method Considering Solar Rotation |
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| Authors: | LIU Jin WANG Ting HU Shuang NING Xiaolin KANG Zhiwei |
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| Affiliation: | College of Information Science and Engineering, Wuhan University of Science and Technology;School of Instrumentation Science & Opto-electronics Engineering, Beihang University,; College of Computer Science and Electronic Engineering, Hunan University |
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| Abstract: | 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. |
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| Keywords: | deep space exploration celestial navigation integrated navigation time delay measurement ephemeris error |
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