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An instance-based algorithm with auxiliary similarity information for the estimation of gait kinematics from wearable sensors.

Goulermas, JY; Findlow, AH; Nester, CJ; Liatsis, P; Zeng, XJ; Kenney, LPJ; Tresadern, P; Thies, SB; Howard, D

Authors

JY Goulermas

AH Findlow

CJ Nester

P Liatsis

XJ Zeng

P Tresadern



Abstract

Wearable human movement measurement systems
are increasingly popular as a means of capturing human movement data in real-world situations. Previous work has attempted to estimate segment kinematics during walking fromfoot acceleration and angular velocity data. In this paper, we propose a novel neural network [GRNN with Auxiliary Similarity Information (GASI)] that estimates joint kinematics by taking account of proximity and gait trajectory slope information through adaptive weighting.
Furthermore, multiple kernel bandwidth parameters are used that can adapt to the local data density. To demonstrate the value of the GASI algorithm, hip, knee, and ankle joint motions are estimated from acceleration and angular velocity data for the foot and shank, collected using commercially available wearable sensors. Reference hip, knee, and ankle kinematic data were obtained using
externally mounted reflective markers and infrared cameras for subjects while they walked at different speeds. The results provide further evidence that a neural net approach to the estimation of joint kinematics is feasible and shows promise, but other practical issues must be addressed before this approach is mature enough for
clinical implementation. Furthermore, they demonstrate the utility of the new GASI algorithm for making estimates from continuous periodic data that include noise and a significant level of variability.

Citation

Goulermas, J., Findlow, A., Nester, C., Liatsis, P., Zeng, X., Kenney, L., …Howard, D. (2008). An instance-based algorithm with auxiliary similarity information for the estimation of gait kinematics from wearable sensors. IEEE transactions on neural networks / a publication of the IEEE Neural Networks Council, 19(9), 1574-1582. https://doi.org/10.1109/TNN.2008.2000808

Journal Article Type Article
Publication Date Jan 1, 2008
Deposit Date Jan 4, 2011
Journal IEEE Transactions on Neural Networks
Print ISSN 1045-9227
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 19
Issue 9
Pages 1574-1582
DOI https://doi.org/10.1109/TNN.2008.2000808
Publisher URL http://dx.doi.org/10.1109/TNN.2008.2000808