Dynamic-programming-based failure-tolerant control for satellite with thrusters in 6-DOF motion

In this paper, a dynamic-programming approach to the coupled translational and rotational control of thruster-driven spacecraft is studied. To reduce the complexity of the problem, dynamic-programming-based optimal policies are calculated using decoupled position and attitude dynamics with generaliz...

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Bibliographic Details
Published in:Advances in space research 2020-06, Vol.65 (12), p.2857-2877
Main Authors: Taheri, Abdolreza, Assadian, Nima
Format: Article
Language:English
Subjects:
6-DOF control
All-thruster satellite
Dynamic programming
Failure-tolerant control
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Summary:In this paper, a dynamic-programming approach to the coupled translational and rotational control of thruster-driven spacecraft is studied. To reduce the complexity of the problem, dynamic-programming-based optimal policies are calculated using decoupled position and attitude dynamics with generalized forces and torques as controls. A quadratic-programming-based control allocation is then used to map the controls to actuator commands. To control the spacecraft in the event of thruster failure, both the dynamic programming policies and control allocation are reconfigured to cope with the losses in controls. The control allocation parameters are adjusted dynamically to ensure the satellite always approaches the target from the side with two operative thrusters to achieve a stable control. The effectiveness of the proposed dynamic programming control is compared with a Lyapunov-stable control method, which shows that the proposed method is more fuel-efficient in tracking the same path.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2020.03.021