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Network-Conscious Damage Tracing Method for Beam Structures Based on Measurements Acquired by Distributed MEMS Gyroscopes

[+] Author Affiliations
Arata Masuda, Akira Sone

Kyoto Institute of Technology

Paper No. IMECE2004-61445, pp. 153-162; 10 pages
doi:10.1115/IMECE2004-61445
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4700-4 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

The aim of this conceptual paper is to develop a damage tracing method to detect and track the evolution of structural damages in aerospace structures, in particular, large beam structures, considering the applicability in a decentralized computing environment of wireless sensor networks. We first present a modal flexibility-based damage indices that have simple and intuitive physical interpretation. Since the damage indices are computed using angular mode shapes of the lowest several modes, vibratory gyroscopes are adopted as the sensing device in this approach. 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. Some illustrative experiments simulating both stationary damages and sudden damages are conducted to show that the proposed method is capable to indicate the location of the damages and the time when they occur.

Copyright © 2004 by ASME

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