Smart Structures and Systems

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Damage localization in plate-like structure using built-in PZT sensor network

  • Liu, Xinglong (National Engineering Laboratory for System Integration of High Speed Train (South), CSR Qingdao Sifang, Co., Ltd.) ;
  • Zhou, Chengxu (Department of Mechanical Engineering, Engineering Faculty, Yamaguchi University) ;
  • Jiang, Zhongwei (Department of Mechanical Engineering, Engineering Faculty, Yamaguchi University)
  • Received : 2010.05.08
  • Accepted : 2011.11.08
  • Published : 2012.01.25
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Abstract

In this study, a Lamb-wave based damage detection approach is proposed for damage localization in plate. A sensor network consisting of three PZT wafer type actuators/sensors is used to generate and detect Lamb waves. To minimize the complication resulted from the multimode and dispersive characteristics of Lamb waves, the fundamental symmetric Lamb mode, $S_0$ is selectively generated through designing the excitation frequency of the narrowband input signal. A damage localization algorithm based upon the configuration of the PZT sensor network is developed. Time-frequency analysis method is applied to purify the raw signal and extract damage features. Experimental result obtained from aluminum plate verified the proposed damage localization approach.

Keywords

References

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