Title
Continuous Terminal Sliding-Mode Control for FJR Subject to Matched/Mismatched Disturbances
Abstract
A robust finite-time control (FTC) framework using continuous terminal sliding-mode control (SMC) and high-order sliding-mode observer (HOSMO) is discussed to realize the trajectory tracking of flexible-joint robots in this article. Control performances of the robots always suffer from unknown matched and mismatched time-varying disturbances. Traditional SMC exists with a chattering phenomenon and cannot cope with mismatched time-varying disturbances due to its inherent structure property. For this reason, two HOSMOs are devised to estimate the time-varying disturbances on the link and motor side, respectively. Then, by fusing the states and disturbance estimations into a novel terminal sliding-mode surface, a continuous robust FTC scheme is developed. The proposed control strategy can not only handle both matched and mismatched time-varying disturbances but also obtain a finite-time convergence performance. The rigorous finite-time stability analysis of the closed-loop system under the proposed control method is guaranteed. The results are illustrated to verify the effectiveness and robustness of the proposed design approach.
Year
DOI
Venue
2022
10.1109/TCYB.2021.3066593
IEEE Transactions on Cybernetics
Keywords
DocType
Volume
Algorithms
Journal
52
Issue
ISSN
Citations 
10
2168-2267
0
PageRank 
References 
Authors
0.34
25
5
Name
Order
Citations
PageRank
Huiming Wang11665103.97
Qiyao Zhang200.34
Zhenxing Sun301.01
Xianlun Tang474.86
I-Ming Chen556787.28