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Volume 11
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10.3390/app112110174
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Article

Prescribed Performance Control for the Upper-Limb Exoskeleton System in Passive Rehabilitation Training Tasks

by
Zhirui Zhao
,
Jichun Xiao
,
Hongyun Jia
,
Hang Zhang
and
Lina Hao
*
Department of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2021, 11(21), 10174; https://doi.org/10.3390/app112110174
Submission received: 30 September 2021 / Revised: 17 October 2021 / Accepted: 27 October 2021 / Published: 29 October 2021
(This article belongs to the Section Robotics and Automation)
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Abstract

In this study, a model-free adaptive sliding mode control method was developed in combination with the prescribed performance method. On this basis, this study attempted to fulfill the joint position tracking trajectory task for the one-degree of freedom (DOF) upper-limb exoskeleton in passive robot-assisted rehabilitation. The proposed method is capable of addressing the defect of the initial error in the controller design and the application by adopting a tuning function, as compared with other prescribed performance methods. Moreover, the method developed here was not determined by the dynamic model parameters, which merely exploit the input and output data. Theoretically, the stability exhibited by the proposed controller and the tracking performance can be demonstrated. From the experimental results, the root mean square of the tracking error is equal to 1.06 degrees, and the steady-state tracking error converges to 1.91 degrees. These results can verify the expected performance of the developed control method.
Keywords: upper-limb exoskeleton; model-free adaptive control; prescribed performance; passive rehabilitation upper-limb exoskeleton; model-free adaptive control; prescribed performance; passive rehabilitation

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MDPI and ACS Style

Zhao, Z.; Xiao, J.; Jia, H.; Zhang, H.; Hao, L. Prescribed Performance Control for the Upper-Limb Exoskeleton System in Passive Rehabilitation Training Tasks. Appl. Sci. 2021, 11, 10174. https://doi.org/10.3390/app112110174

AMA Style

Zhao Z, Xiao J, Jia H, Zhang H, Hao L. Prescribed Performance Control for the Upper-Limb Exoskeleton System in Passive Rehabilitation Training Tasks. Applied Sciences. 2021; 11(21):10174. https://doi.org/10.3390/app112110174

Chicago/Turabian Style

Zhao, Zhirui, Jichun Xiao, Hongyun Jia, Hang Zhang, and Lina Hao. 2021. "Prescribed Performance Control for the Upper-Limb Exoskeleton System in Passive Rehabilitation Training Tasks" Applied Sciences 11, no. 21: 10174. https://doi.org/10.3390/app112110174

APA Style

Zhao, Z., Xiao, J., Jia, H., Zhang, H., & Hao, L. (2021). Prescribed Performance Control for the Upper-Limb Exoskeleton System in Passive Rehabilitation Training Tasks. Applied Sciences, 11(21), 10174. https://doi.org/10.3390/app112110174

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