中国空间科学技术

中国空间科学技术 ›› 2024, Vol. 44 ›› Issue (3): 60-68.doi: 10.16708/j.cnki.1000-758X.2024.0039

• 地月空间基础设施专题 • 上一篇    下一篇

平动点导航星座下的月面接收机自主完好性监测

鲁智威，许承东，黄国限，石默然，武明   

  1. 北京理工大学 宇航学院，北京100081
  • 出版日期:2024-06-25 发布日期:2024-06-05

Receiver autonomous integrity monitoring of lunar surface in libration point navigation constellation

LU Zhiwei，XU Chengdong，HUANG Guoxian，SHI Moran，WU Ming   

  1. School of Aerospace Engineering，Beijing Institute of Technology，Beijing 100081，China
  • Published:2024-06-25 Online:2024-06-05

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摘要： 为了减少月球探测复杂环境对导航的影响和提升平动点导航星座的可靠性，提出了一种基于多假设解分离的月面接收机自主完好性监测方法。该方法利用了地月空间引力不对称性，仅需3颗平动点卫星测量信息就可以实现月面用户级完好性监测。为使月球背面更多区域的可见星数达到完好性监测所需卫星数，增加L2点Halo轨道卫星数并采用多种群遗传算法优化Halo轨道振幅和初始相位。最后采用解分离算法验证了基于3颗卫星进行完好性监测的可行性。仿真表明，在2颗可见星条件下可实现故障检测，平面短周期轨道卫星故障更容易检测；在3颗可见星条件下可实现故障排除，故障偏差达到20σ~30σ（σ=1m）时，故障检测率和排除率开始上升到100%。首次分析了基于平动点导航星座的完好性监测可行性并提出了解决方法，该方法可应用于探月任务导航领域，为未来探月任务完好性监测算法和平动点导航星座设计提供了有益参考。

关键词: 导航星座, 完好性, 解分离, 平动点, 多种群遗传算法

Abstract:  In order to reduce the influence of complex environment for lunar exploration on navigation and to improve the reliability of libration point navigation constellation，a receiver autonomous integrity monitoring method of lunar surface based on multiple hypothesis separation solutions（MHSS）is proposed.This method takes advantage of the gravity asymmetry in cislunar space and realizes the user-level integrity monitoring of lunar surface by using the measurement information from only three libration point satellites.To meet the number requirement of visible satellites in more areas of the far side of the Moon for integrity monitoring，the number of Halo orbit satellites around L2 is increased and the amplitudes and initial phases of Halo are optimized by multipopulation genetic algorithm.Finally，the MHSS algorithm is used to verify the feasibility of integrity monitoring based on three satellites.The simulations show that fault detection is realized under the condition of two visible satellites，and that fault detection of the planar short-period orbit satellite is easier.Results also show that fault exclusion is realized under the condition of three visible satellites，and that fault detection and exclusion rate begin to rise to 100% when fault deviation reaches up to between 20σ and 30σ（σ=1m）.The feasibility of integrity monitoring based on libration point navigation constellation is analyzed for the first time and a method is proposed.The method can be applied to the navigation of lunar exploration missions and provides a useful reference for the design of both integrity monitoring algorithm and libration point navigation constellation for lunar exploration missions in the future.

Key words:  , navigation constellation；integrity；separation solutions；libration point；multiple population genetic algorithm