Document Detail

Design and Control of the MINDWALKER Exoskeleton.
MedLine Citation:
PMID:  25373109     Owner:  NLM     Status:  Publisher    
Powered exoskeletons can empower paraplegics to stand and walk. Actively controlled hip ab/adduction (HAA) is needed for weight shift and for lateral foot placement to support dynamic balance control and to counteract disturbances in the frontal plane. Here, we describe the design, control, and preliminary evaluation of a novel exoskeleton, MINDWALKER. Besides powered hip flexion/ extension and knee flexion/extension, it also has powered HAA. Each of the powered joints has a series elastic actuator, which can deliver 100Nm torque and 1kW power. A finite-state machine based controller provides gait assistance in both the sagittal and frontal planes. State transitions, such as stepping, can be triggered by the displacement of the Center of Mass (CoM). A novel step-width adaptation algorithm was proposed to stabilize lateral balance. We tested this exoskeleton on both healthy subjects and paraplegics. Experimental results showed that all users could successfully trigger steps by CoM displacement. The step-width adaptation algorithm could actively counteract disturbances, such as pushes. With the current implementations, stable walking without crutches has been achieved for healthy subjects but not yet for SCI paraplegics. More research and development is needed to improve the gait stability.
Shiqian Wang; Letian Wang; Cory Meijneke; Edwin van Asseldonk; Thomas Hoellinger; Guy Cheron; Yuri Ivanenko; Valentina La Scaleia; Francesca Sylos-Labini; Marco Molinari; Federica Tamburella; Iolanda Pisotta; Freygardur Thorsteinsson; Michel Ilzkovitz; Jeremi Gancent; Yashodhan Nevatia; Ralf Hauffe; Frank Zanow; Herman van der Kooij
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-30
Journal Detail:
Title:  IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society     Volume:  -     ISSN:  1558-0210     ISO Abbreviation:  IEEE Trans Neural Syst Rehabil Eng     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-11-5     Completed Date:  -     Revised Date:  2014-11-6    
Medline Journal Info:
Nlm Unique ID:  101097023     Medline TA:  IEEE Trans Neural Syst Rehabil Eng     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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