Damage detection for plate-like structure using matching pursuits with chirplet atom

A damage localization method for plate-like structure is developed based on Lamb waves and matching pursuits method with chirplet dictionary. The matching pursuits method is employed to decompose Lamb wave signals into a linear expansion of several chirplet atoms with a fast realization algorithm. The relationship between Lamb wave's dispersion and chirplet's chirp rate is established, which can be used to identify the modes of Lamb waves. Then a method for damage localization is developed based on the difference between the baseline signals and the damaged signals. The effectiveness and accuracy of the proposed method for identifying the modes and locating defects are demonstrated by the simulation and experimental results of isotropic plate structure and honeycomb sandwich composite structure.

[1]  Santanu Das,et al.  Identifying damage in plates by analyzing Lamb wave propagation characteristics , 2002, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[2]  Carlos E. S. Cesnik,et al.  Guided-wave signal processing using chirplet matching pursuits and mode correlation for structural health monitoring , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[3]  Shie Qian,et al.  Signal representation using adaptive normalized Gaussian functions , 1994, Signal Process..

[4]  Xiaomin Deng,et al.  Structural health monitoring using active sensors and wavelet transforms , 1999, Smart Structures.

[5]  Jeong-Beom Ihn,et al.  Pitch-catch Active Sensing Methods in Structural Health Monitoring for Aircraft Structures , 2008 .

[6]  Zhou Li.  Damage identification for plate-like structure using genetic algorithms and scattered Lamb waves , 2007 .

[7]  Y. Kim,et al.  Waveguide damage detection by the matching pursuit approach employing the dispersion-based chirp functions. , 2006, IEEE transactions on ultrasonics, ferroelectrics, and frequency control.

[8]  Y. Kim,et al.  Dispersion-based short-time Fourier transform applied to dispersive wave analysis. , 2005, The Journal of the Acoustical Society of America.

[9]  J. Craggs,et al.  Diffraction of Elastic Waves and Dynamic Stress Concentrations, Y.H. Pao, C.C. Mow. Crane Russak, New York (1973), and London: Adam Hilger. ix+694 pp., offset litho, £7.50 , 1974 .

[10]  D. Marquardt.  An Algorithm for Least-Squares Estimation of Nonlinear Parameters , 1963 .

[11]  Stéphane Mallat,et al.  Matching pursuits with time-frequency dictionaries , 1993, IEEE Trans. Signal Process..

[12]  S. Quek,et al.  Detecting anomalies in beams and plate based on the Hilbert Huang transform of real signals , 2003 .

[13]  Francisco López-Ferreras,et al.  Matching pursuit-based approach for ultrasonic flaw detection , 2006, Signal Process..