Abstract A novel discrete-time pure-tension sliding mode predictive control scheme is presented to realize the deployment of space tethered satellite system in consideration of saturated input, which inherits the property of explicitly handling constraints from model predictive control, and the remarkable robustness from sliding mode control. Considering the digital control characteristics of the practical engineering, a discrete-time nonlinear model of space tethered satellite system is derived based on the discrete-time Euler-Lagrange theorem. Then, a discrete-time underactuated sliding manifold and a sliding mode predictive equation are raised to guarantee a more stable and faster tension control. Meanwhile, given the input saturation, an auxiliary controller is involved in the proposed controller to compensate saturated tension. By using Lyapunov stability theory, the accessibility of the discrete-time sliding manifold and the asymptotic stability of the deployment process are certificated. Finally, groups of numerical simulations for the deployment are demonstrated to verify the effectiveness of the proposed control scheme.
Highlights A discrete-time sliding mode predictive control scheme is proposed for the deployment of space tethered satellite system. A discrete-time Euler-Lagrange model is developed for space tethered satellite system. The discrete-time sliding manifold is underactuated and nonlinear coupled, subject to input and states constraints. Given the input saturation, an auxiliary controller is raised to guarantee the asymptotic stability of control scheme. For practical consideration, the proposed scheme is pure-tension control with only length and angle measurements.
Discrete-time pure-tension sliding mode predictive control for the deployment of space tethered satellite with input saturation
Acta Astronautica ; 170 ; 521-529
2020-02-04
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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