System Identification of Physiological Systems Using Short Data Segments

Overview

Journal IEEE Trans Biomed Eng

Specialties Biomedical Engineering
Biophysics

Date 2012 Oct 4

PMID 23033429

Citations 12

Authors

Daniel Ludvig

Eric J Perreault

Affiliations

Soon will be listed here.

Abstract

System identification of physiological systems poses unique challenges, especially when the structure of the system under study is uncertain. Nonparametric techniques can be useful for identifying system structure, but these typically assume stationarity and require large amounts of data. Both of these requirements are often not easily obtained in the study of physiological systems. Ensemble methods for time-varying nonparametric estimation have been developed to address the issue of stationarity, but these require an amount of data that can be prohibitive for many experimental systems. To address this issue, we developed a novel algorithm that uses multiple short data segments. Using simulation studies, we showed that this algorithm produces system estimates with lower variability than previous methods when limited data are present. Furthermore, we showed that the new algorithm generates time-varying system estimates with lower total error than an ensemble method. Thus, this algorithm is well suited for the identification of physiological systems that vary with time or from which only short segments of stationary data can be collected.

Citing Articles

The Simultaneous Model-Based Estimation of Joint, Muscle, and Tendon Stiffness is Highly Sensitive to the Tendon Force-Strain Relationship.

Cop C, Jakubowski K, Schouten A, Koopman B, Perreault E, Sartori M IEEE Trans Biomed Eng. 2023; 71(3):987-997.

PMID: 37831575 PMC: 10960253. DOI: 10.1109/TBME.2023.3324485.

Leveraging Joint Mechanics Simplifies the Neural Control of Movement.

Ludvig D, Whitmore M, Perreault E Front Integr Neurosci. 2022; 16:802608.

PMID: 35387200 PMC: 8978895. DOI: 10.3389/fnint.2022.802608.

Frontal plane ankle stiffness increases with weight-bearing.

Matos M, Perreault E, Ludvig D J Biomech. 2021; 124:110565.

PMID: 34167018 PMC: 8569913. DOI: 10.1016/j.jbiomech.2021.110565.

On predictions in critical care: The individual prognostication fallacy in elderly patients.

Beil M, Sviri S, Flaatten H, de Lange D, Jung C, Szczeklik W J Crit Care. 2020; 61:34-38.

PMID: 33075607 PMC: 7553132. DOI: 10.1016/j.jcrc.2020.10.006.

Estimating Human Wrist Stiffness during a Tooling Task.

Phan G, Hansen C, Tommasino P, Budhota A, Mohan D, Hussain A Sensors (Basel). 2020; 20(11).

PMID: 32521678 PMC: 7308925. DOI: 10.3390/s20113260.

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