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Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles

Computer vision techniques have been employed to characterize dynamic properties of structures, as well as to capture structural motion for system identification purposes. All of these methods leverage image-processing techniques using a stationary camera. This requirement makes finding an effective...

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Autores principales: Yoon, Hyungchul, Hoskere, Vedhus, Park, Jong-Woong, Spencer, Billie F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5621165/
https://www.ncbi.nlm.nih.gov/pubmed/28891985
http://dx.doi.org/10.3390/s17092075
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author Yoon, Hyungchul
Hoskere, Vedhus
Park, Jong-Woong
Spencer, Billie F.
author_facet Yoon, Hyungchul
Hoskere, Vedhus
Park, Jong-Woong
Spencer, Billie F.
author_sort Yoon, Hyungchul
collection PubMed
description Computer vision techniques have been employed to characterize dynamic properties of structures, as well as to capture structural motion for system identification purposes. All of these methods leverage image-processing techniques using a stationary camera. This requirement makes finding an effective location for camera installation difficult, because civil infrastructure (i.e., bridges, buildings, etc.) are often difficult to access, being constructed over rivers, roads, or other obstacles. This paper seeks to use video from Unmanned Aerial Vehicles (UAVs) to address this problem. As opposed to the traditional way of using stationary cameras, the use of UAVs brings the issue of the camera itself moving; thus, the displacements of the structure obtained by processing UAV video are relative to the UAV camera. Some efforts have been reported to compensate for the camera motion, but they require certain assumptions that may be difficult to satisfy. This paper proposes a new method for structural system identification using the UAV video directly. Several challenges are addressed, including: (1) estimation of an appropriate scale factor; and (2) compensation for the rolling shutter effect. Experimental validation is carried out to validate the proposed approach. The experimental results demonstrate the efficacy and significant potential of the proposed approach.
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spelling pubmed-56211652017-10-03 Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles Yoon, Hyungchul Hoskere, Vedhus Park, Jong-Woong Spencer, Billie F. Sensors (Basel) Article Computer vision techniques have been employed to characterize dynamic properties of structures, as well as to capture structural motion for system identification purposes. All of these methods leverage image-processing techniques using a stationary camera. This requirement makes finding an effective location for camera installation difficult, because civil infrastructure (i.e., bridges, buildings, etc.) are often difficult to access, being constructed over rivers, roads, or other obstacles. This paper seeks to use video from Unmanned Aerial Vehicles (UAVs) to address this problem. As opposed to the traditional way of using stationary cameras, the use of UAVs brings the issue of the camera itself moving; thus, the displacements of the structure obtained by processing UAV video are relative to the UAV camera. Some efforts have been reported to compensate for the camera motion, but they require certain assumptions that may be difficult to satisfy. This paper proposes a new method for structural system identification using the UAV video directly. Several challenges are addressed, including: (1) estimation of an appropriate scale factor; and (2) compensation for the rolling shutter effect. Experimental validation is carried out to validate the proposed approach. The experimental results demonstrate the efficacy and significant potential of the proposed approach. MDPI 2017-09-11 /pmc/articles/PMC5621165/ /pubmed/28891985 http://dx.doi.org/10.3390/s17092075 Text en © 2017 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
Yoon, Hyungchul
Hoskere, Vedhus
Park, Jong-Woong
Spencer, Billie F.
Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title_full Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title_fullStr Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title_full_unstemmed Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title_short Cross-Correlation-Based Structural System Identification Using Unmanned Aerial Vehicles
title_sort cross-correlation-based structural system identification using unmanned aerial vehicles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5621165/
https://www.ncbi.nlm.nih.gov/pubmed/28891985
http://dx.doi.org/10.3390/s17092075
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