Integrated Observer-based Fixed-time Control with Backstepping Method for Exoskeleton Robot | |
Gao-Wei Zhang1,2; Peng Yang1,2; Jie Wang1,2; Jian-Jun Sun1,2; Yan Zhang1,2 | |
刊名 | International Journal of Automation and Computing |
2020 | |
卷号 | 17期号:1页码:71-82 |
关键词 | Upper-limb exoskeleton sliding mode control (SMC) fixed-time control disturbance observe backstepping. |
ISSN号 | 1476-8186 |
DOI | 10.1007/s11633-019-1201-z |
英文摘要 | To achieve the fast convergence and tracking precision of a robotic upper-limb exoskeleton, this paper proposes an observer-based integrated fixed-time control scheme with a backstepping method. Firstly, a typical 5 DoF (degrees of freedom) dynamics is constructed by Lagrange equations and processed for control purposes. Secondly, second-order sliding mode controllers (SOSMC) are developed and novel sliding mode surfaces are introduced to ensure the fixed-time convergence of the human-robot system. Both the reaching time and settling time are proved to be bounded with certain values independent of initial system conditions. For the purpose of rejecting the matched and unmatched disturbances, nonlinear fixed-time observers are employed to estimate the exact value of disturbances and compensate the controllers online. Ultimately, the synthesis of controllers and disturbance observers is adopted to achieve the excellent tracking performance and simulations are given to verify the effectiveness of the proposed control strategy. |
内容类型 | 期刊论文 |
源URL | [http://ir.ia.ac.cn/handle/173211/42311] |
专题 | 自动化研究所_学术期刊_International Journal of Automation and Computing |
作者单位 | 1.School of Artificial Intelligence, Hebei University of Technology, Tianjin 300130, China 2.Enginnering Research Center of Intelligent Rehabilitation and Detection Technology, Ministry of Education, Tianjin 300130, China |
推荐引用方式 GB/T 7714 | Gao-Wei Zhang,Peng Yang,Jie Wang,et al. Integrated Observer-based Fixed-time Control with Backstepping Method for Exoskeleton Robot[J]. International Journal of Automation and Computing,2020,17(1):71-82. |
APA | Gao-Wei Zhang,Peng Yang,Jie Wang,Jian-Jun Sun,&Yan Zhang.(2020).Integrated Observer-based Fixed-time Control with Backstepping Method for Exoskeleton Robot.International Journal of Automation and Computing,17(1),71-82. |
MLA | Gao-Wei Zhang,et al."Integrated Observer-based Fixed-time Control with Backstepping Method for Exoskeleton Robot".International Journal of Automation and Computing 17.1(2020):71-82. |
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