Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation

This study has designed an easy-to-wear parallel continuum robot-based hand rehabilitation system that supports and enhances the finger’s flexion, extension, abduction, and adduction movements. The primary novelty of the proposed system lies in its ability to focus therapeutic exercises on a single...

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Main Authors: Gazi Akgun, Erkan Kaplanoglu, Gokhan Erdemir
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Actuators
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Online Access:https://www.mdpi.com/2076-0825/13/12/500
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author Gazi Akgun
Erkan Kaplanoglu
Gokhan Erdemir
author_facet Gazi Akgun
Erkan Kaplanoglu
Gokhan Erdemir
author_sort Gazi Akgun
collection DOAJ
description This study has designed an easy-to-wear parallel continuum robot-based hand rehabilitation system that supports and enhances the finger’s flexion, extension, abduction, and adduction movements. The primary novelty of the proposed system lies in its ability to focus therapeutic exercises on a single joint, a feature not commonly found in existing rehabilitation robots. A kinematic model of the system was developed, and to perform both kinematic and dynamic analyses, a multibody model was constructed in the MATLAB Simulink environment. Joint angle control was implemented using a nominal controller, and to account for individual uncertainties in joint dynamics, a neuroadaptive controller was integrated with the nominal controller. This approach aims for the neural network architecture to learn these uncertainties during control iterations and incorporate them into the control, resulting in a robust controller. Thus, a model reference control approach was proposed for active and passive rehabilitation processes. The system model was tested in a simulation environment, and then all tests were repeated in the physical system. The simulation and real system results include the real system’s open-loop responses, nominal controller responses for each joint, responses, and the results for active, passive, and assistive control modes.
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spelling doaj-art-bfe646f777314d63a3f37d5701dbddbb2025-08-20T02:00:55ZengMDPI AGActuators2076-08252024-12-01131250010.3390/act13120500Neuroadaptive Control of a Continuum Robot for Finger RehabilitationGazi Akgun0Erkan Kaplanoglu1Gokhan Erdemir2Department of Engineering Management and Technology, University of Tennessee at Chattanooga, Chattanooga, TN 37405, USADepartment of Engineering Management and Technology, University of Tennessee at Chattanooga, Chattanooga, TN 37405, USADepartment of Engineering Management and Technology, University of Tennessee at Chattanooga, Chattanooga, TN 37405, USAThis study has designed an easy-to-wear parallel continuum robot-based hand rehabilitation system that supports and enhances the finger’s flexion, extension, abduction, and adduction movements. The primary novelty of the proposed system lies in its ability to focus therapeutic exercises on a single joint, a feature not commonly found in existing rehabilitation robots. A kinematic model of the system was developed, and to perform both kinematic and dynamic analyses, a multibody model was constructed in the MATLAB Simulink environment. Joint angle control was implemented using a nominal controller, and to account for individual uncertainties in joint dynamics, a neuroadaptive controller was integrated with the nominal controller. This approach aims for the neural network architecture to learn these uncertainties during control iterations and incorporate them into the control, resulting in a robust controller. Thus, a model reference control approach was proposed for active and passive rehabilitation processes. The system model was tested in a simulation environment, and then all tests were repeated in the physical system. The simulation and real system results include the real system’s open-loop responses, nominal controller responses for each joint, responses, and the results for active, passive, and assistive control modes.https://www.mdpi.com/2076-0825/13/12/500continuum robotfinger rehabilitationtherapeutic exercisemodel reference neuroadaptive controlwearable rehabilitation system
spellingShingle Gazi Akgun
Erkan Kaplanoglu
Gokhan Erdemir
Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
Actuators
continuum robot
finger rehabilitation
therapeutic exercise
model reference neuroadaptive control
wearable rehabilitation system
title Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
title_full Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
title_fullStr Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
title_full_unstemmed Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
title_short Neuroadaptive Control of a Continuum Robot for Finger Rehabilitation
title_sort neuroadaptive control of a continuum robot for finger rehabilitation
topic continuum robot
finger rehabilitation
therapeutic exercise
model reference neuroadaptive control
wearable rehabilitation system
url https://www.mdpi.com/2076-0825/13/12/500
work_keys_str_mv AT gaziakgun neuroadaptivecontrolofacontinuumrobotforfingerrehabilitation
AT erkankaplanoglu neuroadaptivecontrolofacontinuumrobotforfingerrehabilitation
AT gokhanerdemir neuroadaptivecontrolofacontinuumrobotforfingerrehabilitation