Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications

Portable exoskeletons can be used to assist elderly or disabled people in their daily activities. The physical human-robot interaction is a major concern in exoskeleton development for both functioning properly and interacting safely and comfortably. Using a model of the human musculoskeletal syste...

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Main Authors: Simon Christensen, Xuerong Li, Shaoping Bai
Format: Article
Language:English
Published: Norwegian Society of Automatic Control 2021-10-01
Series:Modeling, Identification and Control
Subjects:
Online Access:http://www.mic-journal.no/PDF/2021/MIC-2021-4-2.pdf
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author Simon Christensen
Xuerong Li
Shaoping Bai
author_facet Simon Christensen
Xuerong Li
Shaoping Bai
author_sort Simon Christensen
collection DOAJ
description Portable exoskeletons can be used to assist elderly or disabled people in their daily activities. The physical human-robot interaction is a major concern in exoskeleton development for both functioning properly and interacting safely and comfortably. Using a model of the human musculoskeletal system and the exoskeleton can help better understanding, estimating and analyzing the physical human-robot interaction. In this paper, a model comprising the biomechanics of human upper body and the dynamics of a 4-DoF exoskeleton, named UB-AXO, is developed and used to study the physical human-robot interaction. The human-exoskeleton model is able to estimate effect of physical human-exoskeleton interaction, such as muscle activity, and energy consumption and human joint reaction forces, when performing cooperative motions with the exoskeleton. The model development is described and subsequently two simulation studies of typical activities of daily living are conducted to analyze and evaluate the performance of the UB-AXO. The simulation results demonstrate that the UB-AXO is able to reduce muscle loading and energy consumption, while maintaining a safe physical human-exoskeleton interaction.
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spelling doaj.art-3e452695042a44198e994a2b7b12f2a12022-12-21T19:38:20ZengNorwegian Society of Automatic ControlModeling, Identification and Control0332-73531890-13282021-10-0142415917210.4173/mic.2021.4.2Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive ApplicationsSimon ChristensenXuerong LiShaoping BaiPortable exoskeletons can be used to assist elderly or disabled people in their daily activities. The physical human-robot interaction is a major concern in exoskeleton development for both functioning properly and interacting safely and comfortably. Using a model of the human musculoskeletal system and the exoskeleton can help better understanding, estimating and analyzing the physical human-robot interaction. In this paper, a model comprising the biomechanics of human upper body and the dynamics of a 4-DoF exoskeleton, named UB-AXO, is developed and used to study the physical human-robot interaction. The human-exoskeleton model is able to estimate effect of physical human-exoskeleton interaction, such as muscle activity, and energy consumption and human joint reaction forces, when performing cooperative motions with the exoskeleton. The model development is described and subsequently two simulation studies of typical activities of daily living are conducted to analyze and evaluate the performance of the UB-AXO. The simulation results demonstrate that the UB-AXO is able to reduce muscle loading and energy consumption, while maintaining a safe physical human-exoskeleton interaction.http://www.mic-journal.no/PDF/2021/MIC-2021-4-2.pdfphysical human-robot interactionbiomechanical modelingassistive exoskeletonenergy exchange in phrioverhead reaching tasks
spellingShingle Simon Christensen
Xuerong Li
Shaoping Bai
Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
Modeling, Identification and Control
physical human-robot interaction
biomechanical modeling
assistive exoskeleton
energy exchange in phri
overhead reaching tasks
title Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
title_full Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
title_fullStr Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
title_full_unstemmed Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
title_short Modeling and Analysis of Physical Human-Robot Interaction of an Upper Body Exoskeleton in Assistive Applications
title_sort modeling and analysis of physical human robot interaction of an upper body exoskeleton in assistive applications
topic physical human-robot interaction
biomechanical modeling
assistive exoskeleton
energy exchange in phri
overhead reaching tasks
url http://www.mic-journal.no/PDF/2021/MIC-2021-4-2.pdf
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AT shaopingbai modelingandanalysisofphysicalhumanrobotinteractionofanupperbodyexoskeletoninassistiveapplications