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Proceedings Paper

Generalized dynamic motion compensation technology for star tracker on rotating spacecraft with acceleration
Author(s): Jun Zhang; YunCai Hao; Li Wang; Da Liu
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Paper Abstract

The influence of acceleration resulting from spacecraft maneuvering on star spot positioning and hereafter dynamic motion compensation technology are addressed. Firstly the pattern of the smeared star-spot image under maneuvering condition and the locating error are investigated. It is found that instead of following a symmetrical shaped pattern, the smeared star spot under acceleration is twisted. Simulation verifies that the position error is far beyond Cramer Rao Lower Bound(CRLB) of photoelectric devices under uniform velocity. Then a novel scheme to derive the more general accurate motion compensation is proposed. In this case, an approximate CRLB is derived to give a baseline to measure the performance of any positioning algorithm and motion compensation technique on star tracker. The theory and corresponding simulations show the novel general compensation approach is better than the conventional compensation strategy and close to the approximate CRLB. Therefore, a CRLB position accuracy of star spot is expected to be realized by using the generalized dynamic compensation method on maneuvering spacecraft.

Paper Details

Date Published: 7 August 2015
PDF: 7 pages
Proc. SPIE 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 962312 (7 August 2015); doi: 10.1117/12.2193074
Show Author Affiliations
Jun Zhang, Beijing Institute of Control Engineering (China)
YunCai Hao, Beijing Institute of Control Engineering (China)
Li Wang, Beijing Institute of Control Engineering (China)
Da Liu, Beijing Institute of Control Engineering (China)


Published in SPIE Proceedings Vol. 9623:
2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems
Jigui Zhu; Hwa-Yaw Tam; Kexin Xu; Hai Xiao; Sen Han, Editor(s)

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