Journal
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
Volume 29, Issue 18, Pages 6483-6506Publisher
WILEY
DOI: 10.1002/rnc.4732
Keywords
actuator saturation; angular velocity unavailable; fault-tolerant control; spacecraft attitude system
Funding
- National Natural Science Foundation of China [61603222]
- Scientific Research Foundation of SDUST for Recruited Talents [2017RCJJ064]
- SDUST Research Fund [2018YQJH101]
- Applied Basic Research Programs of Qingdao [18-2-2-57-jch]
- Research Fund for the Taishan Scholar Project of Shandong Province of China
Ask authors/readers for more resources
In this paper, a fault-tolerant control scheme is proposed to control the attitude of a rigid spacecraft subject to external disturbances and multiple system uncertainties, as well as actuator faults and saturation. More challengingly, it is assumed that the angular velocity is unavailable. A super-twisting observer with time-varying gain is firstly designed to accurately estimate the angular velocity in finite time. The choice of the time-varying gain is dependent on a state-norm estimate. Then, using the information from the observer (estimate of angular velocity), a fault-tolerant controller is proposed, where an adaptive law is introduced to address the unknown loss of effectiveness and neural networks are used to approximate the unknown nonlinear functions. It is proved that the attitude orientations converge to the desired values at a fixed time. Finally, a simulation example is utilized to verify the effectiveness of the proposed scheme.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available