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NARMAX representation and identification of ankle dynamics
Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
Dept. of Biomedical Engineering, McGill University, Montreal, QC H3A 2T5, Canada.
Dept. of Biomedical Engineering, McGill University, Montreal, QC H3A 2T5, Canada.
2003 (English)In: IEEE Transactions on Biomedical Engineering, ISSN 0018-9294, E-ISSN 1558-2531, Vol. 50, no 1, 70-81 p.Article in journal (Refereed) Published
Abstract [en]

Representation and identification of a parallel pathway description of ankle dynamics as a model of the nonlinear autoregressive, moving average exogenous (NARMAX) class is considered. A nonlinear difference equation describing this ankle model is derived theoretically and shown to be of the NARMAX form. Identification methods for NARMAX models are applied to ankle dynamics and its properties investigated via continuous-time simulations of experimental conditions. Simulation results show that 1) the outputs of the NARMAX model match closely those generated using continuous-time methods and 2) NARMAX identification methods applied to ankle dynamics provide accurate discrete-time parameter estimates. Application of NARMAX identification to experimental human ankle data models with high cross-validation variance accounted for.

Place, publisher, year, edition, pages
2003. Vol. 50, no 1, 70-81 p.
Keyword [en]
Ankle dynamics, Mathematical modeling, NARMAX, Nonlinear systems, System identification
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-46761DOI: 10.1109/TBME.2002.803507OAI: diva2:267657
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2012-01-07

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