中国空间科学技术

中国空间科学技术 ›› 2019, Vol. 39 ›› Issue (6): 38-.doi: 10.16708/j.cnki.1000-758X.2019.0048

• 研究探讨 • 上一篇    下一篇

基于火卫二视线测量的火星接近段自主导航算法

唐青原, 王晓磊   

  1. 北京控制工程研究所，北京100190
  • 出版日期:2019-12-25 发布日期:2019-12-06

Autonomous navigation based on Deimos lightofsight for Mars approaching phase

TANG Qingyuan, WANG Xiaolei   

  1. Beijing Institute of Control Engineering，Beijing 100190, China
  • Published:2019-12-25 Online:2019-12-06

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摘要： 针对火星接近段导航通信时延大、存在通信盲区、自主导航可用观测信息有限等问题，提出了一种基于一组火卫二相对探测器视线矢量测量的天文自主导航算法，每个导航周期测量一组火卫二视线矢量可得到其中某一时刻探测器的完整轨道信息的估计值，该方法不依赖于轨道渐近线方向等先验信息。考虑到存在火卫二和火星在同一视场的情形，此时结合火星中心视线矢量方向以及火卫二的星历信息可估计出精度较高的探测器轨道半径，作为第一种方法的补充观测量，提高导航精度。最后给出仿真校验，验证了该方法的导航精度和可行性，表明该方案能够满足未来火星探测接近段自主导航需求。

关键词: 火星接近段, 自主导航, 视线矢量, 火卫二

Abstract: The accuracy of navigation during Mars approaching phase is limited by large time delay, discontinuity of radio signal, and insufficient measurement information. An autonomous navigation method is proposed based on a succession of Deimos lightofsight (LOS) measurements relative to the spacecraft. Each position and velocity estimation is achieved through a group of Deimos LOS measurements. This method is independent of prior information such as direction of orbit asymptote. In consideration of the case that Deimos and Mars would be in the same field of view, the orbit radius can be achieved by combining Mars LOS measurement and Deimos ephemeris, which can act as supplementary measurement to improve navigation accuracy. The orbit estimation accuracy and feasibility of this navigation scheme are verified through numerical simulation, which shows that the method can meet the requirement of approaching phase orbit determination during future Mars exploration.

Key words: Mars approaching phase, autonomous navigation, lightofsight, Deimos