Attitude Coordinated Control for Docked Spacecraft Based on Estimated Coupling Torque
Publication: Journal of Aerospace Engineering
Volume 29, Issue 6
Abstract
When a service spacecraft docks successfully with its target spacecraft and forms a docked spacecraft, it will cause a large shift in the dynamics of the docked spacecraft. Not only do the mass properties change, but so do the reaction wheels’ configuration. Meanwhile, the attitude of the docked spacecraft will inevitably change, under the influence of contact and impact, and it may lead to instability of the entire system. Due to the limited control torque and saturation, the control system of the reaction wheel may not guarantee the system stability, and the thruster can generate large control torque, but it consumes valuable jet fuel. Since the space manipulator may generate a greater coupling torque by movement, this paper proposes an attitude coordinated control method for docked spacecraft based on the estimated coupling torque. The method adopts the chaotic particle swarm optimization (CPSO) algorithm to plan the coordinated motion trajectory of space manipulator, and then designs a coordinated control law based on the estimated coupling torque of space manipulator to achieve the attitude control of docked spacecraft in order to guarantee the system stability. Numerical simulations validate the feasibility of the proposed method. In comparison with the traditional attitude control method, the attitude coordinated control method makes use of the coupling torque of the space manipulator, and overcomes the shortcomings of the limited control torque and saturation of reaction wheel, without consuming expensive jet fuel.
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Acknowledgments
This research is sponsored by the National Natural Science Foundation of China (Grant No. 11272256, 61005062, 60805034).
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Information & Authors
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Published In
Journal of Aerospace Engineering
Volume 29 • Issue 6 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Oct 23, 2015
Accepted: Apr 4, 2016
Published online: Jul 12, 2016
Published in print: Nov 1, 2016
Discussion open until: Dec 12, 2016
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