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Output feedback control for attitude tracking

✍ Scribed by Fabrizio Caccavale; Luigi Villani

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
148 KB
Volume
38
Category
Article
ISSN
0167-6911

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✦ Synopsis

In this paper the problem of attitude tracking control for a rigid spacecraft is addressed. It is assumed that only attitude measurements are available, and thus spacecraft's angular velocity has to be properly estimated. Two alternative schemes are proposed in which the unit quaternion is adopted to represent the orientation. In the ΓΏrst scheme, a second-order model-based observer is adopted to estimate the angular velocity used in the control law. In the second scheme, an estimate of the angular velocity error is obtained through a lead ΓΏlter. Su cient conditions ensuring local exponential stability of the two controllers are derived via Lyapunov analysis.

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