A Signal Processing Approach for Elastic Wave-Based Structural Health Monitoring Using Active Piezoelectrics

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A series of digital frequency filters (DFFs) were designed to screen diverse noises and the spectrographic analysis was conducted to isolate complex boundary reflection, which obscures the damage-induced signals. The scale-averaged wavelet power (SAP) technique was applied to enhance the measurement accuracy of Time of Flight (TOF). As an example, the propagation characteristics of elastic wave in a structural beam of square cross-section were analyzed using such an approach and verified experimentally and numerically, with the consideration of the complicated wave scatter caused by the non-ignorable section dimensions.

Info:

Periodical:

Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang

Pages:

1141-1144

Citation:

C. H. Yang et al., "A Signal Processing Approach for Elastic Wave-Based Structural Health Monitoring Using Active Piezoelectrics", Key Engineering Materials, Vols. 334-335, pp. 1141-1144, 2007

Online since:

March 2007

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$38.00

[1] Z.Q. Su, L. Ye, X. Bu, X. Wang and Y. -W. Mai: Structural Health Monitoring, 2(1) (2003), p.27.

[2] H.T. Banks, D.J. Inman, D.J. Leo and Y. Wang: J. Sound & Vibration 191(5) (1996), p.859.

[3] J.C.H. Keilers and F. -K. Chang: J. Intelligent Mater. Strut. 6 (1995), p.649.

[4] S.S. Kessler, S.M. Spearing and C. Soutis: Smart Mater. Strut. 11 (2002), p.269.

[5] J.L. Rose: Ultrasonic waves in solid media, Cambridge University Press, New York (1999).

[6] Z.Q. Su, L. Ye and X. Bu: Composite Strut. 57 (2002), p.465.

[7] J. Hou, K.R. Leonard and M.K. Hinders: Inverse Problems 20 (2004), p.1873.

[8] G. Georgiou, F.S. Cohen: IEEE Tran. Ultra. Ferro. Freq. Ctrl. 48(2) (2001), p.355.

[9] Z.Q. Su, L. Ye: J. Intelligent Mater. Strut. 16 (2005), p.113.