Observability analysis of Mars entry integrated navigation

被引：17

作者：

Wang, Liansheng ^{[1
]}

Xia, Yuanqing ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Automat, Beijing 100081, Peoples R China

来源：

ADVANCES IN SPACE RESEARCH | 2015年 / 56卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Mars entry integrated navigation schemes; Observability; Condition number; Fisher information matrix; Estimability; STATE ESTIMATION; DESCENT;

D O I：

10.1016/j.asr.2015.05.016

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

This paper studies three schemes of Mars entry navigation: inertial measurement unit (IMU) based dead reckoning (DR), IMU/orbiter based integrated navigation, and IMU/orbiter/Mars surface beacon (MSB) based integrated navigation. We demonstrate through simulations that first scheme, IMU based DR, produces substantially large state estimation errors. Although these errors are reduced by adding two Mars orbiters, the system is only barely observable. However, by adding two MSBs in above configuration, the position and velocity estimation errors are reduced to the scope of 10 m and 0.5 m/s respectively and the navigation system becomes completely observable. Finally, the estimability of states is investigated; it is observed that velocity variables or velocity variables linear combinations can be estimated better than position variables. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：952 / 963

页数：12

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