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    A simulation-based study on a clutch-spring mechanism reducing human walking metabolic cost

    Access Status
    Fulltext not available
    Authors
    Shen, Z.
    Sam, S.
    Allison, Garry
    Cui, Lei
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Shen, Z. and Sam, S. and Allison, G. and Cui, L. 2018. A simulation-based study on a clutch-spring mechanism reducing human walking metabolic cost. International Journal Of Mechanical Engineering And Robotics Research. 7 (1): pp. 55-60.
    Source Title
    International Journal Of Mechanical Engineering And Robotics Research
    DOI
    10.18178/ijmerr.7.1.55-60
    ISSN
    2278-0149
    School
    School of Physiotherapy and Exercise Science
    URI
    http://hdl.handle.net/20.500.11937/67881
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 Int. J. Mech. Eng. Rob. Res. Reducing metabolic cost of walking has long been a challenge for exoskeleton researchers. A recent break-through reported a passive exoskeleton that yielded signifi-cant energy saving with a clutch-spring mechanism working in parallel with calf muscles. In this study we asked whether the same bio-mechanism exists in the hip and knee joints. We employed OpenSim, an open source platform, and the MATLAB Optimization Toolbox to optimize the engaging and disengaging timings and the stiffness of the springs for walking energetic efficiency. When applied to the ankle joint, the proposed approach yielded results that agreed with the reported one. We then extended this method to the hip and knee joints, respectively. The simulations showed the springs could save up to 6.38%, 4.85% and 7.63% for the ankle, knee and hip joints at the optimal stiffness of 8.20kN/m, 7.35kN/m and 4.15kN/m, respectively.

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