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A NEW METHOD FOR PASSIVE ANKLE FOOT ORTHOSIS DESIGN – INTEGRATION OF MUSCULOSKELETAL AND FINITE ELEMENT SIMULATION

Published online by Cambridge University Press:  19 June 2023

David Scherb ,
Patrick Steck ,
Harald Völkl ,
Sandro Wartzack  and
Jörg Miehling
David Scherb*
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg
Patrick Steck
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg
Harald Völkl
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg
Sandro Wartzack
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg
Jörg Miehling
Affiliation:
Friedrich-Alexander-Universität Erlangen-Nürnberg
*
Scherb, David, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, scherb@mfk.fau.de

Abstract

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Motor disorders are diseases affecting the muscle function of the human body. A frequently occurring motor disorder affects the lower leg muscles resulting in a pathological gait called foot drop. Patients have a higher risk of stumbling and falling. The most common treatment is the use of a passive ankle-foot-orthosis (AFO). However, the compensation of foot drop is only limited due to the non possible support of all rotational directions of the ankle joint. Therefore, a newly developed concept for a passive AFO is currently in work. To ensure a best possible treatment of the patient, the provided support by the AFO and required support by the patient have to be in accordance. Thus, in this contribution a method is presented that integrates model order reduced finite element analysis for computing the provided support of the AFO and musculoskeletal human models for representing the patients' gait behaviour. With the method, the design of the force generating structures of the AFO can be realized regarding the patients' requirements. The presented method is further evaluated with a specific use case. The main focus lies here in the principal functionality of the method and the provision of valid results.

Keywords

User centred designDesign methodsProduct modelling / modelsOrthosisMusculoskeletal human model
Type
Article
Information
Proceedings of the Design Society , Volume 3: ICED23 , July 2023 , pp. 333 - 342
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
The Author(s), 2023. Published by Cambridge University Press

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