Título:
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Influence of input data errors on the inverse dynamics analysis of human locomotion
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Autor/a:
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Pàmies Vilà, Rosa; Font Llagunes, Josep Maria; Cuadrado, Javier; Alonso, Francisco Javier
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Otros autores:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica; Universitat Politècnica de Catalunya. GREVTAM - Grup de Recerca en Vibracions i Teoria i Anàlisis de Màquines |
Abstract:
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Inverse dynamic techniques are used in gait analysis to calculate the net joint moments that the musculoskeletal
system produces during human locomotion. Errors present in the input data may affect
significantly the results of the inverse dynamics problem. In this work, the influence of inaccuracies in
body segment parameters (BSP) and ground reaction force measurements on the obtained results is
analyzed. The uncertainties in these data are computer-generated as perturbations added to their actual
values. On the one hand, the uncertainties in BSP are modelled as statistical errors using zero-mean
Gaussian distributions. On the other hand, inaccurate ground reaction forces are represented adding a
percentage of error to the theoretical force. Errors present in the ground reaction forces allow to estimate
the uncertainty introduced to the analysis when ambiguous force plate measurements are used as input
parameters. The paper presents detailed results and discussions to quantify the effects of the above errors
on the inverse dynamics analysis. The several simulations carried out show that the results are more
sensitive to errors in the ground contact forces –when these are used– than in the body inertial parameters. |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria mecànica -Àrees temàtiques de la UPC::Enginyeria biomèdica::Biomecànica -Biomechanics -Human locomotion -Biomecànica -Enginyeria mecànica |
Derechos:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Tipo de documento:
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Artículo - Versión publicada Objeto de conferencia |
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