TY - JOUR
T1 - Automated defect localization via low rank plus outlier modeling of propagating wavefield data
AU - Gonella, Stefano
AU - Haupt, Jarvis
PY - 2013/12
Y1 - 2013/12
N2 - This work proposes an agnostic inference strategy for material diagnostics, conceived within the context of laser-based nondestructive evaluation methods which extract information about structural anomalies from the analysis of acoustic wavefields measured on the structure's surface by means of a scanning laser interferometer. The proposed approach couples spatiotemporal windowing with low rank plus outlier modeling, to identify a priori unknown deviations in the propagating wavefields caused by material inhomogeneities or defects, using virtually no knowledge of the structural and material properties of the medium. This characteristic makes the approach particularly suitable for diagnostics scenarios in which the mechanical and material models are complex, unknown, or unreliable. We demonstrate our approach in a simulated environment using benchmark point and line defect localization problems based on propagating flexural waves in a thin plate.
AB - This work proposes an agnostic inference strategy for material diagnostics, conceived within the context of laser-based nondestructive evaluation methods which extract information about structural anomalies from the analysis of acoustic wavefields measured on the structure's surface by means of a scanning laser interferometer. The proposed approach couples spatiotemporal windowing with low rank plus outlier modeling, to identify a priori unknown deviations in the propagating wavefields caused by material inhomogeneities or defects, using virtually no knowledge of the structural and material properties of the medium. This characteristic makes the approach particularly suitable for diagnostics scenarios in which the mechanical and material models are complex, unknown, or unreliable. We demonstrate our approach in a simulated environment using benchmark point and line defect localization problems based on propagating flexural waves in a thin plate.
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U2 - 10.1109/TUFFC.2013.2854
DO - 10.1109/TUFFC.2013.2854
M3 - Article
AN - SCOPUS:84890353301
SN - 0885-3010
VL - 60
SP - 2553
EP - 2565
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 12
M1 - 6666076
ER -