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Observer Based Sliding Mode Control for a Knee Exoskeleton

  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

To solve the problems in estimation and controlling caused by disturbance, an observer based sliding mode control method for an anthropomorphically designed knee exoskeleton is proposed in this study. Firstly, a sliding mode disturbance observer was designed to estimate the disturbance, including the internal disturbance caused by uncertainty in the dynamic model and external disturbance exerted by a human. Then, impedance control was used to achieve human-robot interaction control. Lastly, a sliding mode controller was designed to drive the exoskeleton. Experiments with disturbance were designed to verify the performance of the sliding mode disturbance observer and the robustness of the sliding mode controller. The results showed that the proposed method had a better performance in estimating and controlling in the presence of unknown disturbance.

Original languageEnglish
Title of host publicationNew Trends in Medical and Service Robotics, MESROB 2021
EditorsGeorg Rauter, Giuseppe Carbone, Philippe C. Cattin, Azhar Zam, Doina Pisla, Robert Riener, Robert Riener
PublisherSpringer Science and Business Media B.V.
Pages58-69
Number of pages12
ISBN (Print)9783030761462
DOIs
StatePublished - 2022
Event7th International Workshop on New Trends in Medical and Service Robotics, MESROB 2021 - Virtual, Online
Duration: 7 Jun 20219 Jun 2021

Publication series

NameMechanisms and Machine Science
Volume106 MMS
ISSN (Print)2211-0984
ISSN (Electronic)2211-0992

Conference

Conference7th International Workshop on New Trends in Medical and Service Robotics, MESROB 2021
CityVirtual, Online
Period7/06/219/06/21

Keywords

  • Anthropomorphically designed knee exoskeleton
  • Impedance control
  • Sliding mode disturbance observer

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