Abstract
Applying Wireless sensor networks (WSNs) in structural health monitoring (SHM) systems has received significant interest from research communities in recent years. While incorporating wireless technology in monitoring systems has provided considerable improvements, new approaches are still needed to address existing challenges in their application. A major challenge in application of WSNs in SHM is the limited power resources of wireless sensors and the latency in the data processing due to the low communication bandwidth. The performance of the networks on both of these factors can be improved through the use of an iterative modal identification algorithm, called IMID. This algorithm uses the local processing capability of wireless sensors and provides a substantial reduction in required communication for identification of system’s modal properties. The iterative approach is such that, starting from an initial estimate of the system’s parameter, all of the nodes of the network use their local measurement and update the estimated modal parameters one-by-one until the convergence of results happens. In this manner, the system’s parameters are the only data that need to be transmitted through the network for updating. This approach results in the significant reduction in the total volume of communication. This paper presents the application of the IMID in modal identification of a 3-D steel truss structure. The results are discussed and the performance of the algorithm is evaluated.
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Acknowledgment
The research described in this paper is supported by the National Science Foundation through Grant No. CMMI-0926898 by Sensors and Sensing Systems Program and by a grant from the Commonwealth of Pennsylvania, Department of Community and Economic Development, through the Pennsylvania Infrastructure Technology Alliance (PITA).
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© 2012 The Society for Experimental Mechanics, Inc. 2012
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Dorvash, S., Pakzad, S.N. (2012). Iterative Modal Identification Algorithm; Implementation and Evaluation. In: Caicedo, J., Catbas, F., Cunha, A., Racic, V., Reynolds, P., Salyards, K. (eds) Topics on the Dynamics of Civil Structures, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2413-0_23
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DOI: https://doi.org/10.1007/978-1-4614-2413-0_23
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