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Problems associated with the use of inverse dynamics in prosthetic applications: An example using a polycentric prosthetic knee

Published online by Cambridge University Press:  27 April 2005

Laura A. Miller  and
Dudley S. Childress
Laura A. Miller
Affiliation:
Department of Veterans Affairs, Jesse Brown VA Medical Center, and Northwestern University Prosthetics Research Laboratory and Rehabilitation Engineering Research Program, Department of Physical Medicine and Rehabilitation, Northwestern University, 345 E. Superior St., Room 1441, Chicago, Illinois 60611 (USA). Rehabilitation Institute of Chicago, Prosthetics and Orthotics Clinical Services (USA).
Dudley S. Childress
Affiliation:
Department of Veterans Affairs, Jesse Brown VA Medical Center, and Northwestern University Prosthetics Research Laboratory and Rehabilitation Engineering Research Program, Department of Physical Medicine and Rehabilitation, Northwestern University, 345 E. Superior St., Room 1441, Chicago, Illinois 60611 (USA). Department of Biomedical Engineering, Northwestern University (USA).
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Abstract

Inverse dynamic calculations are often performed in the analysis of human ambulation. However, assumptions are made in the construction of the models that may not be valid for some prosthetic componentry, specifically polycentric knees used by transfemoral amputees. Data were collected for one subject using a polycentric knee. Moments and forces were calculated when ignoring the extra linkages of the knee and when including the extra linkages of the knee. Significant differences were seen in the hip moment and power between the two cases and indicate that care must be taken when comparing componentry that violates the basic assumptions of the rigid link model.

Keywords

ProstheticsInverse dynamicsPolycentric knee
Type
Research Article
Information
Robotica , Volume 23 , Issue 3 , May 2005 , pp. 329 - 335
Copyright
© 2005 Cambridge University Press

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