Fractional-Order Nonsingular Terminal Sliding Mode Tension Control for the Deployment of Space Tethered Satellite

In this article, a novel fractional-order nonsingular terminal sliding mode (FONTSM) control scheme is developed, which guarantees the desired deployment performance of space tethered satellite (STS) system. The presented control scheme is to stabilize the underactuated deployment mission with only...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2021-10, Vol.57 (5), p.2759-2770
Main Authors: Li, Xiaolei, Sun, Guanghui, Han, Shuo, Shao, Xiangyu
Format: Article
Language:English
Subjects:
Adaptive compensation
Aerospace electronics
Control systems design
Controllers
disturbance observer
Disturbance observers
fractional-order system
Mathematical model
nonsingular terminal sliding mode
Orbits
Satellites
Sliding mode control
Space missions
space tethered satellite (STS)
Space vehicles
Sun
Tethered satellites
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Summary:In this article, a novel fractional-order nonsingular terminal sliding mode (FONTSM) control scheme is developed, which guarantees the desired deployment performance of space tethered satellite (STS) system. The presented control scheme is to stabilize the underactuated deployment mission with only tension regulation. Based on the underactuated model, a practicable integer-order nonsingular terminal sliding mode (IONTSM) controller is designed to realize the deployment of the STS system, with the finite-time stability. Then, to improve the deployment performance, the fractional-order calculus is introduced to raise the FONTSM controller, whose Mittag-Leffler-based uniform ultimate boundedness is proved to ensure the finite-time convergence and steady-state performance. In the FONTSM controller, a fractional-order disturbance observer and a fractional-order adaptive compensation law are proposed, to eliminate the adverse impacts of external disturbances and input saturation, respectively. Moreover, compared to the reported fractional-order sliding mode control strategy of the STS system, a better deployment performance can be obtained by the IONTSM and FONTSM controllers in this work. Finally, the effectiveness of the proposed controllers is verified by groups of deployment simulations of the STS system.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2021.3061815