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Bridge Displacement Estimation Using a Co-Located Acceleration and Strain

Structural displacement is an important metric for assessing structural conditions because it has a direct relationship with the structural stiffness. Many bridge displacement measurement techniques have been developed, but most methods require fixed reference points in the vicinity of the target st...

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Detalles Bibliográficos
Autores principales: Sarwar, Muhammad Zohaib, Park, Jong-Woong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7071052/
https://www.ncbi.nlm.nih.gov/pubmed/32085606
http://dx.doi.org/10.3390/s20041109
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author Sarwar, Muhammad Zohaib
Park, Jong-Woong
author_facet Sarwar, Muhammad Zohaib
Park, Jong-Woong
author_sort Sarwar, Muhammad Zohaib
collection PubMed
description Structural displacement is an important metric for assessing structural conditions because it has a direct relationship with the structural stiffness. Many bridge displacement measurement techniques have been developed, but most methods require fixed reference points in the vicinity of the target structure that limits the field implementations. A promising alternative is to use reference-free measurement techniques that indirectly estimate the displacement by using measurements such as acceleration and strain. This paper proposes novel reference-free bridge displacement estimation by the fusion of single acceleration with pseudo-static displacement derived from co-located strain measurements. First, we propose a conversion of the strain at the center of a beam into displacement based on the geometric relationship between strain and deflection curves with reference-free calibration. Second, an adaptive Kalman filter is proposed to fuse the displacement generated by strain with acceleration by recursively estimating the noise covariance of displacement from strain measurements which is vulnerable to measurement condition. Both numerical and experimental validations are presented to demonstrate the efficiency and robustness of the proposed approach.
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spelling pubmed-70710522020-03-19 Bridge Displacement Estimation Using a Co-Located Acceleration and Strain Sarwar, Muhammad Zohaib Park, Jong-Woong Sensors (Basel) Article Structural displacement is an important metric for assessing structural conditions because it has a direct relationship with the structural stiffness. Many bridge displacement measurement techniques have been developed, but most methods require fixed reference points in the vicinity of the target structure that limits the field implementations. A promising alternative is to use reference-free measurement techniques that indirectly estimate the displacement by using measurements such as acceleration and strain. This paper proposes novel reference-free bridge displacement estimation by the fusion of single acceleration with pseudo-static displacement derived from co-located strain measurements. First, we propose a conversion of the strain at the center of a beam into displacement based on the geometric relationship between strain and deflection curves with reference-free calibration. Second, an adaptive Kalman filter is proposed to fuse the displacement generated by strain with acceleration by recursively estimating the noise covariance of displacement from strain measurements which is vulnerable to measurement condition. Both numerical and experimental validations are presented to demonstrate the efficiency and robustness of the proposed approach. MDPI 2020-02-18 /pmc/articles/PMC7071052/ /pubmed/32085606 http://dx.doi.org/10.3390/s20041109 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sarwar, Muhammad Zohaib
Park, Jong-Woong
Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title_full Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title_fullStr Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title_full_unstemmed Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title_short Bridge Displacement Estimation Using a Co-Located Acceleration and Strain
title_sort bridge displacement estimation using a co-located acceleration and strain
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7071052/
https://www.ncbi.nlm.nih.gov/pubmed/32085606
http://dx.doi.org/10.3390/s20041109
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