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Title
Development of a passive, wearable knee orthosis for the support of sittostand movement with adaptive assistance moment
AuthorZiegler, Jakob ; Parzer, Herbert ; Gattringer, Hubert ; Müller, Andreas
Published in
Proceedings in Applied Mathematics and Mechanics (PAMM), 2018, Vol. 18, Issue 1
PublishedWiley, 2018
LanguageEnglish
Document typeJournal Article
ISSN1617-7061
URNurn:nbn:at:at-ubl:3-671 Persistent Identifier (URN)
DOI10.1002/pamm.201800097 
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 The work is publicly available
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Development of a passive, wearable knee orthosis for the support of sittostand movement with adaptive assistance moment [0.27 mb]
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Abstract (English)

The worldwide population aging and hence the higher risk of agerelated diseases facilitates interest in robotic devices for rehabilitation and movement assistance. A major factor of a persons functional independence is the ability to perform the movement task of standing up from a chair, also known as sittostand (STS) movement. This work focuses on the development of a passive, wearable knee orthosis that supports the extension of the knee joint. As the knee flexes while sitting down a spring mechanism is loaded due to a cable wrapping around a deflection disc, thus generating a moment that assists standing up again. In order to prevent unintended knee extension this assistance moment should be minimized when the person is fully seated. To this end the geometry of the deflection disc, parametrized as Bspline curve, is optimized in order to control the knee extension moment with respect to the knee angle. Initial tests with a first prototype show promising results.

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CC-BY-NC-ND-License (4.0)Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License