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Proceedings Paper

Q-adjusting technique applied to vertical deflections estimation in a single-axis rotation INS/GPS integrated system
Author(s): Jing Zhu; Xingshu Wang; Jun Wang; Dongkai Dai; Hao Xiong
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Paper Abstract

Former studies have proved that the attitude error in a single-axis rotation INS/GPS integrated system tracks the high frequency component of the deflections of the vertical (DOV) with a fixed delay and tracking error. This paper analyses the influence of the nominal process noise covariance matrix Q on the tracking error as well as the response delay, and proposed a Q-adjusting technique to obtain the attitude error which can track the DOV better. Simulation results show that different settings of Q lead to different response delay and tracking error; there exists optimal Q which leads to a minimum tracking error and a comparatively short response delay; for systems with different accuracy, different Q-adjusting strategy should be adopted. In this way, the DOV estimation accuracy of using the attitude error as the observation can be improved. According to the simulation results, the DOV estimation accuracy after using the Q-adjusting technique is improved by approximate 23% and 33% respectively compared to that of the Earth Model EGM2008 and the direct attitude difference method.

Paper Details

Date Published: 19 October 2016
PDF: 7 pages
Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101550B (19 October 2016); doi: 10.1117/12.2243850
Show Author Affiliations
Jing Zhu, National Univ. of Defense Technology (China)
Xingshu Wang, National Univ. of Defense Technology (China)
Jun Wang, National Univ. of Defense Technology (China)
Dongkai Dai, National Univ. of Defense Technology (China)
Hao Xiong, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 10155:
Optical Measurement Technology and Instrumentation
Sen Han; JiuBin Tan, Editor(s)

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