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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Autonomous celestial navigation for a deep space probe approaching a target planet based on ephemeris correction
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Autonomous celestial navigation for a deep space probe approaching a target planet based on ephemeris correction

机译：基于星历校正的深空探测器接近目标行星的自主天文导航

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This article aims to propose an autonomous navigation method to simultaneously obtain precise position and velocity estimation of a deep space probe both with respect to Earth and with respect to the target, and estimate and correct the ephemeris uncertainty of the target that has a great influence on the navigation accuracy with respect to Earth. In this article, based on the analysis of the influences of ephemeris error on the state model, optical measurement, and the navigation accuracy, the ephemeris error is modeled. By taking the differences between the planned image and the actual image of the target as the ephemeris uncertainty measurement, the method is carried out by augmenting ephemeris uncertainty as system states, and is able to estimate and correct the ephemeris uncertainty of the target planet, and the position and velocity of the probe with respect to Earth and with respect to the target planet autonomously. The results show the influence of ephemeris error is removed from the orbital dynamics of the navigation system, and the proposed method can improve the accuracy with respect to Earth. The results demonstrate the proposed method autonomously yields superior performance with respect to Earth and with respect to the target.
机译：本文旨在提出一种自主导航方法，以同时获得相对于地球和相对于目标的深空探测器的精确位置和速度估计，并估计和校正对星历的重大影响的目标星历不确定性相对于地球的导航精度。本文在分析星历误差对状态模型，光学测量和导航精度的影响的基础上，对星历误差进行了建模。通过将目标的计划图像和实际图像之间的差异作为星历不确定度测量，该方法通过将星历不确定度作为系统状态进行增强，并且能够估算和校正目标行星的星历不确定度，并且探头相对于地球和相对于目标行星的位置和速度自动。结果表明，星历误差的影响已从导航系统的轨道动力学中消除，并且该方法可以提高相对于地球的精度。结果表明，所提出的方法相对于地球和相对于目标自动产生了优异的性能。

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