Sliding Mode Control Techniques and Artificial Potential Field for Dynamic Collision Avoidance in Rendezvous Maneuvers

The paper considers autonomous rendezvous maneuver and proximity operations of two spacecraft in presence of obstacles. A strategy that combines guidance and control algorithms is analyzed. The proposed closed-loop system is able to guarantee a safe path in a real environment, as well as robustness...

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Bibliographic Details
Published in:arXiv.org 2019-06
Main Authors: Mancini, Mauro, Bloise, Nicoletta, Capello, Elisa, Punta, Elisabetta
Format: Article
Language:English
Subjects:
Algorithms
Barriers
Collision avoidance
Collision dynamics
Computer simulation
Control algorithms
Control systems
Degrees of freedom
Feedback control
Maneuvers
Potential fields
Sliding mode control
Space rendezvous
Spacecraft attitude control
Spacecraft guidance
Spacecraft tracking
Strategy
Upgrading
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Summary:The paper considers autonomous rendezvous maneuver and proximity operations of two spacecraft in presence of obstacles. A strategy that combines guidance and control algorithms is analyzed. The proposed closed-loop system is able to guarantee a safe path in a real environment, as well as robustness with respect to external disturbances and dynamic obstacles. The guidance strategy exploits a suitably designed Artificial Potential Field (APF), while the controller relies on Sliding Mode Control (SMC), for both position and attitude tracking of the spacecraft. As for the position control, two different first order SMC methods are considered, namely the component-wise and the simplex-based control techniques. The proposed integrated guidance and control strategy is validated by extensive simulations performed with a six degree-of-freedom (DOF) orbital simulator and appears suitable for real-time control with minimal on-board computational effort. Fuel consumption and control effort are evaluated, including different update frequencies of the closed-loop software.
ISSN:2331-8422