17 May 2005 Flexibility-based damage identification algorithm embedded in sensor network environment
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Abstract
This paper describes a damage identification method for structures mainly subject to bending load, considering the applicability in a decentralized computing environment of wireless sensor networks. A modal flexibility-based damage indices that have simple and intuitive physical interpretation is presented. Since the proposed damage indices are computed using angular mode shapes of the lowest several modes, MEMS gyroscopes are adopted as the sensing device. The damage evaluation algorithm is then modified to a decentralized form, which is to be implemented as the local computation of mode separation at each sensor unit and the global computation of the damage index at the central monitoring station. Experiments using a bolted beam are conducted to show the applicability of the proposed algorithm to the detection of loose bolt failures.
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Arata Masuda, Akira Sone, Masashi Yamashita, Yuito Hashimoto, "Flexibility-based damage identification algorithm embedded in sensor network environment", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); doi: 10.1117/12.599505; https://doi.org/10.1117/12.599505
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KEYWORDS
Sensors

Gyroscopes

Sensor networks

Microelectromechanical systems

Data acquisition

Prototyping

Structural health monitoring

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