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- Title
Full-order sliding mode control for finite-time attitude tracking of rigid spacecraft.
- Authors
Zhuoyue Song; Chao Duan; Housheng Su; Jinchang Hu
- Abstract
This study addresses an attitude tracking problem for a rigid spacecraft with bounded external disturbances. Attitude dynamics of the rigid spacecraft is modelled by a unit quaternion for global representation. Based on this representation, a novel continuous controller is proposed based on the full-order terminal sliding mode method. The finite-time stability of the closed-loop system is assured by Lyapunov and homogeneous finite-time stability theorems. Moreover, the singularity term in the terminal sliding surface is compensated by an identical item in the feedback control law, and this makes the closed-loop system trajectories converge to the equilibrium in finite-time, and hence a high precision is obtained. Finally, simulation results are presented to illustrate the effectiveness of the proposed controller.
- Subjects
SPACE vehicles; SLIDING mode control; FINITE difference time domain method; LYAPUNOV functions; NONLINEAR systems
- Publication
IET Control Theory & Applications (Wiley-Blackwell), 2018, Vol 12, Issue 8, p1086
- ISSN
1751-8644
- Publication type
Article
- DOI
10.1049/iet-cta.2017.0583