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Current Directions in Biomedical Engineering

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Buzug, Thorsten M. / Haueisen, Jens / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Kraft, Marc / Lenarz, Thomas / Leonhardt, Steffen / Malberg, Hagen / Penzel, Thomas / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Urban, Gerald A.


CiteScore 2018: 0.47

Source Normalized Impact per Paper (SNIP) 2018: 0.377

Open Access
Online
ISSN
2364-5504
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A user-specific human-machine interaction strategy for a prosthetic shank adapter

Florian Stuhlenmiller
  • Corresponding author
  • Institute for Mechatronic Systems in Mechanical Engineering, TU Darmstadt, 64287 Darmstadt, Germany
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/ Jochen Schuy
  • Institute for Mechatronic Systems in Mechanical Engineering, TU Darmstadt, 64287 Darmstadt, Germany
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/ Philipp Beckerle
  • Institute for Mechatronic Systems in Mechanical Engineering, TU Darmstadt, 64287 Darmstadt, Germany
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/ Stephan Rinderknecht
  • Institute for Mechatronic Systems in Mechanical Engineering, TU Darmstadt, 64287 Darmstadt, Germany
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Published Online: 2017-09-07 | DOI: https://doi.org/10.1515/cdbme-2017-0103

Abstract

For people with lower limb amputation, a user-specific human-machine interaction with their prostheses is required to ensure safe and comfortable assistance. Especially during dynamic turning manoeuvres, users experience high loads at the stump, which decreases comfort and may lead to long-term tissue damage. Preliminary experiments with users wearing a configurable, passive torsional adaptor indicate increased comfort and safety achieved by adaptation of torsional stiffness and foot alignment. Moreover, the results show that the individual preference regarding both parameters depend on gait situation and individual preference. Hence, measured loads in the structure of the prosthesis and subjective feedback regarding comfort and safety during different turning motions are considered in a user-specific human-machine interaction strategy for a prosthetic shank adaptor. Therefore, the interrelations of gait parameters with optimal configuration are stored in an individual preference-setting matrix. Stiffness and foot alignment are actively adjusted to the optimal parameters by a parallel elastic actuator. Two subjects reported that they experienced appropriate variation of stiffness and foot alignment, a noticeable reduction of load at the stump and that they could turn with less effort.

Keywords: human-machine interaction; shank prosthesis; customization; gait scenario

About the article

Published Online: 2017-09-07


Citation Information: Current Directions in Biomedical Engineering, Volume 3, Issue 2, Pages 493–496, ISSN (Online) 2364-5504, DOI: https://doi.org/10.1515/cdbme-2017-0103.

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©2017 Florian Stuhlenmiller et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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