Open AccessFixed‐time attitude tracking control for rigid spacecraft
Author(s) -
Wang Zeng,
Su Yuxin,
Zhang Liyin
Publication year - 2020
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2019.0623
Subject(s) - control theory (sociology) , robustness (evolution) , inertia , fixed point , tracking (education) , spacecraft , sliding mode control , attitude control , computer science , convergence (economics) , robust control , mathematics , control (management) , control engineering , nonlinear system , control system , engineering , artificial intelligence , physics , pedagogy , economic growth , aerospace engineering , mathematical analysis , chemistry , psychology , biochemistry , classical mechanics , quantum mechanics , electrical engineering , economics , gene
This study addresses the fixed‐time attitude tracking for rigid spacecraft with inertia uncertainties and external disturbances. Firstly, a new fixed‐time sliding surface based on the bi‐limit homogeneous theory is proposed. Secondly, a non‐singular sliding mode control is designed to solve the robust fixed‐time attitude tracking problem. It is proved that the proposed control can ensure that the sliding surface and attitude tracking errors converge to zero within fixed time. The appealing features of the proposed control are exact fixed‐time tracking stability with fast convergence, high precision, strong robustness and easy implementation. Simulations verify the effectiveness and improved performance of the proposed approach.