Landmark-based autonomous navigation for pinpoint planetary landing

被引:19
作者
Xu, Chao [1 ]
Wang, Dayi [1 ]
Huang, Xiangyu [1 ]
机构
[1] Beijing Inst Control Engn, Beijing 100190, Peoples R China
关键词
Autonomous navigation; Pinpoint landing; Sequential images; Landmarks; Information fusion; AIDED INERTIAL NAVIGATION; DESCENT; SCHEME; SYSTEM; PHASE;
D O I
10.1016/j.asr.2016.08.021
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
A landmark-based autonomous navigation scheme is presented for pinpoint planetary landing. The dynamic model is built on the basis of measurements from Inertial Measurement Unit. Measurement models of landmarks with known coordinates and landmarks with unknown coordinates extracted from sequential descent images are developed and used to calculated the state corrections in Extend Kalman Filter, respectively. Then, the corrections are fused by a covariance intersection fusion algorithm to perform state updates. The tight coupling of the two types of landmark observations yields accurate and robust state estimates. Extensive simulations are performed, which confirm the validity of the proposed navigation scheme and analyze the effects of factors, such as the horizonal position errors and the densities of landmarks with known coordinates and the roughness of the landing surface, on the navigation accuracy. (C) 2016 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:2313 / 2327
页数:15
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