Direct measurement as a tool for assessing the accuracy of inverse dynamics

Stevenson, Nathan, Smeathers, James, Evans, John, & Frossard, Laurent (2004) Direct measurement as a tool for assessing the accuracy of inverse dynamics. In V Australasian Biomechanics Conference (ABC5), 9-10 December 2004, Sydney, Australia.


The understanding of the loads generated within the prosthetic leg can aid engineers in the design of components and clinicians in the process of rehabilitation. Traditional methods to assess these loads have relied on inverse dynamics. This indirect method estimates the applied load using video recordings and force-plates located at a distance from the region of interest, such as the base of the residuum. The well-known limitations of this method are related to the accuracy of this recursive model and the experimental conditions required (Frossard et al., 2003). Recent developments in sensors (Frossard et al., 2003) and prosthetic fixation (Brånemark et al., 2000) permit the direct measurement of the loads applied on the residuum of transfemoral amputees. In principle, direct measurement should be an appropriate tool for assessing the accuracy of inverse dynamics. The purpose of this paper is to determine the validity of this assumption. The comparative variable used in this study is the velocity of the relative body center of mass (VCOM(t)). The relativity is used to align the static (w.r.t. position) force plate measurement with the dynamic load cell measurement.

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ID Code: 83162
Item Type: Conference Paper
Refereed: Yes
Keywords: inverse dynamics
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: Copyright 2004 [please consult the authors]
Deposited On: 07 Apr 2015 22:41
Last Modified: 13 Apr 2015 01:45

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