Validation of Various Filters and Sampling Parameters for a COP Analysis
The center of pressure (CoP) is one of the most utilized quantitative measurements describing postural competency. Due to the complexity and biological variability of postural regulatory systems, a myriad of different methods and parameters have been established describing the CoP trajectory. Beside...
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doaj-f810e31dc00f4ccb9f057c2fdeefd9822020-11-24T22:16:32ZengMDPI AGTechnologies2227-70802018-06-01625610.3390/technologies6020056technologies6020056Validation of Various Filters and Sampling Parameters for a COP AnalysisJan Jens Koltermann0Martin Gerber1Heidrun Beck2Michael Beck3University Center for Orthopedic and Trauma Surgery, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, GermanySLG Prüf- und Zertifizierungs GmbH, Medical Devices and Laser Safety, 09232 Hartmannsdorf, GermanyUniversity Center for Orthopedic and Trauma Surgery, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, GermanyInstitute of Electrical Systems and Energy Logistics, Faculty of Mechanical Engineering, Electrical and Energy Systems, Brandenburg University of Technology Cottbus-Senftenberg, 01968 Senftenberg, GermanyThe center of pressure (CoP) is one of the most utilized quantitative measurements describing postural competency. Due to the complexity and biological variability of postural regulatory systems, a myriad of different methods and parameters have been established describing the CoP trajectory. Besides procedural variables, such as foot position, visual condition, and sampling duration, the method of data collection itself has a relevant effect on the result of the measurement. Furthermore, different methods for recording the measured data have been developed, which differ regarding the filters, frequencies, and test durations used. The goal of this study was the methodical comparison of various filters, measurement frequencies, and measurement duration, with respect to their effects on the CoP trajectory. Based on the results presented, we demonstrate that the Butterworth and Bessel filters can be recommended for analysis of CoP data, and at the very least, a second-order filter should be chosen for the process. For assessment of the cutoff frequency, a technical pendulum was used to show that a cutoff frequency of 13 Hz provided reliable data and it can be inferred that a 100 Hz sampling rate would be the minimum requirement.http://www.mdpi.com/2227-7080/6/2/56COPforce plateAMTIKistlercenter of pressurepostural controlbalancefilterButterworthsampling duration effect |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jan Jens Koltermann Martin Gerber Heidrun Beck Michael Beck |
spellingShingle |
Jan Jens Koltermann Martin Gerber Heidrun Beck Michael Beck Validation of Various Filters and Sampling Parameters for a COP Analysis Technologies COP force plate AMTI Kistler center of pressure postural control balance filter Butterworth sampling duration effect |
author_facet |
Jan Jens Koltermann Martin Gerber Heidrun Beck Michael Beck |
author_sort |
Jan Jens Koltermann |
title |
Validation of Various Filters and Sampling Parameters for a COP Analysis |
title_short |
Validation of Various Filters and Sampling Parameters for a COP Analysis |
title_full |
Validation of Various Filters and Sampling Parameters for a COP Analysis |
title_fullStr |
Validation of Various Filters and Sampling Parameters for a COP Analysis |
title_full_unstemmed |
Validation of Various Filters and Sampling Parameters for a COP Analysis |
title_sort |
validation of various filters and sampling parameters for a cop analysis |
publisher |
MDPI AG |
series |
Technologies |
issn |
2227-7080 |
publishDate |
2018-06-01 |
description |
The center of pressure (CoP) is one of the most utilized quantitative measurements describing postural competency. Due to the complexity and biological variability of postural regulatory systems, a myriad of different methods and parameters have been established describing the CoP trajectory. Besides procedural variables, such as foot position, visual condition, and sampling duration, the method of data collection itself has a relevant effect on the result of the measurement. Furthermore, different methods for recording the measured data have been developed, which differ regarding the filters, frequencies, and test durations used. The goal of this study was the methodical comparison of various filters, measurement frequencies, and measurement duration, with respect to their effects on the CoP trajectory. Based on the results presented, we demonstrate that the Butterworth and Bessel filters can be recommended for analysis of CoP data, and at the very least, a second-order filter should be chosen for the process. For assessment of the cutoff frequency, a technical pendulum was used to show that a cutoff frequency of 13 Hz provided reliable data and it can be inferred that a 100 Hz sampling rate would be the minimum requirement. |
topic |
COP force plate AMTI Kistler center of pressure postural control balance filter Butterworth sampling duration effect |
url |
http://www.mdpi.com/2227-7080/6/2/56 |
work_keys_str_mv |
AT janjenskoltermann validationofvariousfiltersandsamplingparametersforacopanalysis AT martingerber validationofvariousfiltersandsamplingparametersforacopanalysis AT heidrunbeck validationofvariousfiltersandsamplingparametersforacopanalysis AT michaelbeck validationofvariousfiltersandsamplingparametersforacopanalysis |
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