A Vector Measurement-based Angular Velocity Estimation Scheme for Maneuvering Spacecraft

A new practical approach to estimate the body angular velocity of maneuvering spacecraft using only vector measurements is presented. Several algorithms have been introduced in previous studies to estimate the angular velocity directly from vector measurements at two time instants. However, these direct methods are based on the constant angular velocity assumption, and estimation results may be invalid for attitude maneuvers. In this paper, an estimation scheme to consider attitude disturbances and control torques is proposed. The effects of angular velocity variation on estimation results are quantitatively evaluated, and an algorithm to minimize estimation errors is designed by selecting the optimal time interval between vector measurements. Without losing the simplicity of direct methods, the design parameters of the algorithm are restricted to the expected covariance of disturbances and the maximum angular acceleration. By applying the proposed estimation scheme, gyroscopes can be directly replaced by attitude sensors such as star trackers.
Publisher
SPRINGER HEIDELBERG
Issue Date
2017-09
Language
English
Keywords

STAR TRACKER MEASUREMENTS; ATTITUDE

Citation

JOURNAL OF THE ASTRONAUTICAL SCIENCES, v.64, no.3, pp.310 - 332

ISSN
0021-9142
DOI
10.1007/s40295-016-0109-x
URI
http://hdl.handle.net/10203/223942
Appears in Collection
AE-Journal Papers(저널논문)
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