A Data-Driven Approach for Estimating Postural Control Using an Inertial Measurement Unit
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Authors
Giachin, Anthony
Steckenrider, J. Josiah
Freisinger, Gregory
Issue Date
2021
Type
proceedings-article
Language
Keywords
Postural control , Neuromuscular status , Inertial Measurement Unit , Force plate , Center of pressure , Probabilistic data modeling , Gaussian mixture models
Alternative Title
Abstract
In this paper, we propose a probabilistic multi-Gaussian parameter estimation technique which addresses the complex relationship between acceleration and ground force signals used to derive a human’s static center of pressure. The intent of this work is to develop an accurate accelerometer-based method for determining postural control and neuromuscular status which is more portable and cost-effective than force plate-based techniques. Acceleration data was collected using an inertial measurement unit while ground reaction forces were simultaneously measured using a force plate. Various metrics were calculated from both sensors and probabilistic data models were built to characterize the relationships between the two sensors. These models were used to predict force-based postural control metrics corresponding to observed acceleration metrics. Data collected from one participant was used as a training set to which the test data of two individuals were then applied. We conclude that converted acceleration-based metrics on average can accurately predict all the corresponding force-based metrics we studied here. Furthermore, the proposed multi-Gaussian parameter estimation approach outperforms a more basic linear transformation technique for 75% of the metrics studied, as evidenced by an increase in correlation coefficients between true and estimated force plate metrics.
Description
Citation
Giachin, A, Steckenrider, JJ, & Freisinger, G. "A Data-Driven Approach for Estimating Postural Control Using an Inertial Measurement Unit." Proceedings of the ASME 2021 International Mechanical Engineering Congress and Exposition. Volume 5: Biomedical and Biotechnology. Virtual, Online. November 1–5, 2021. V005T05A042. ASME. https://doi.org/10.1115/IMECE2021-70518
Publisher
ASME