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Is estimation of Floquet multipliers of human walking valid?

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Authors
Ahn, Jooeun; Hogan, Neville
Issue Date
2014-04-27
Publisher
IEEE
Citation
Bioengineering Conference (NEBEC), 2014 40th Annual Northeast, pp. 1-2
Keywords
Is estimation of Floquet multipliers of human walking valid?복합학Floquet multiplierFloquet multiplierstabilitystochastic noisewalking modellinear regression
Abstract
The Floquet multiplier has been widely used to assess orbital stability of human walking. Floquet introduced it to quantify the stability of periodic motion of deterministic linear systems, but human walking involves highly nonlinear dynamics and inevitable noise. This preliminary study addresses the validity of Floquet multiplier estimation of a nonlinear system with stochastic noise. Noise was added to a simplified but nonlinear model of human walking so that the variability of model walking was comparable to that of human walking. Results show that linear regression yields a biased measure of the Floquet multiplier though its accuracy improves with a sufficient number of strides.
ISSN
2160-6986
URI
http://hdl.handle.net/10371/116815
DOI
https://doi.org/10.1109/NEBEC.2014.6972705
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College of Education (사범대학)Dept. of Physical Education (체육교육과)Others_체육교육과
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