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New celestial assisted INS initial alignment method for lunar explorer

机译:新天线辅助Lunar Explorer的初始对齐方法

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摘要

In the future lunar exploration programs of China,soft landing,sampling and returning will be realized.For lunar explorers such as Rovers,Landers and Ascenders,the inertial navigation system(INS) will be used to obtain high-precision navigation information.INS propagates position,velocity and attitude by integration of sensed accelerations,so initial alignment is needed before INS can work properly.However,traditional ground-based initial alignment methods cannot work well on the lunar surface because of its low rotation rate(0.55%).For solving this problem, a new autonomous INS initial alignment method assisted by celestial observations is proposed,which uses star observations to help INS estimate its attitude,gyroscopes drifts and accelerometer biases.Simulations show that this new method can not only speed up alignment,but also improve the alignment accuracy.Furthermore, the impact factors such as initial conditions,accuracy of INS sensors,and accuracy of star sensor on alignment accuracy are analyzed in details,which provide guidance for the engineering applications of this method.This method could be a promising and attractive solution for lunar explorer’s initial alignment.

著录项

  • 来源
    《系统工程与电子技术(英文版)》 |2013年第1期|108-117|共10页
  • 作者单位

    Lunar Exploration and Aerospace Engineering Center Beijing 100037 China;

    School of Instrument Science and Opto-electronics Engineering Beihang University Beijing 100191 China;

    School of Instrument Science and Opto-electronics Engineering Beihang University Beijing 100191 China;

    Science and Technology on Inertial Laboratory Fundamental Science on Novel Inertial Instrument and Navigation System Technology Laboratory Beijing 100191 China;

    School of Instrument Science and Opto-electronics Engineering Beihang University Beijing 100191 China;

    Science and Technology on Inertial Laboratory Fundamental Science on Novel Inertial Instrument and Navigation System Technology Laboratory Beijing 100191 China;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类
  • 关键词

  • 入库时间 2022-08-19 04:47:29
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