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Feasibility of Output-Only Modal Identification Using Wireless Sensor Network : A Quantitative Field Experimental Study
Joint Authors
Wang, Yang
Hu, Liang
Lei, Ying
Shen, Wen-ai
Source
International Journal of Distributed Sensor Networks
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-13
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Telecommunications Engineering
Information Technology and Computer Science
Abstract EN
Although significant advancements have been achieved in wireless sensor network (WSN) in the past decades, there is still a strong need for in-depth analysis on wireless time synchronization and data quality during field testing.
In this paper, an academic WSN is adopted for output-only modal identification of two full-scale bridges in Xiamen, China.
This paper first assesses the accuracy of time synchronization performed by the WSN through a centralized beacon signal and then studies wireless data quality using two quantitative performance indexes.
The relationship between vibration amplitude and quality of wireless sensor data is investigated.
With ambient bridge accelerations acquired by wireless sensing units, modal properties of the two bridges are identified using the stochastic subspace identification (SSI) method and the enhanced frequency domain decomposition (EFDD) method.
Accuracies of the modal identification results are evaluated through comparison with modal properties identified from tethered sensing data.
The comparison shows close match in natural frequencies and mode shapes, although relatively large difference in damping ratios exists between results from wireless and tethered sensing data.
An overall close match between the wireless and tethered results demonstrates the feasibility of using WSN for the ambient vibration testing of full-scale bridges.
American Psychological Association (APA)
Shen, Wen-ai& Lei, Ying& Hu, Liang& Wang, Yang. 2012. Feasibility of Output-Only Modal Identification Using Wireless Sensor Network : A Quantitative Field Experimental Study. International Journal of Distributed Sensor Networks،Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-480735
Modern Language Association (MLA)
Shen, Wen-ai…[et al.]. Feasibility of Output-Only Modal Identification Using Wireless Sensor Network : A Quantitative Field Experimental Study. International Journal of Distributed Sensor Networks No. 2012 (2012), pp.1-17.
https://search.emarefa.net/detail/BIM-480735
American Medical Association (AMA)
Shen, Wen-ai& Lei, Ying& Hu, Liang& Wang, Yang. Feasibility of Output-Only Modal Identification Using Wireless Sensor Network : A Quantitative Field Experimental Study. International Journal of Distributed Sensor Networks. 2012. Vol. 2012, no. 2012, pp.1-17.
https://search.emarefa.net/detail/BIM-480735
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-480735