Bayesian Separation of Lamb Wave Signatures

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Description

A persistent problem in the analysis of Lamb wave signatures in experimental data is the fact that several different modes appear simultaneously in the signal. The modes overlap in both the frequency and time domains. Attempts to separate the overlapping Lamb wave signatures by conventional signal processing methods have been unsatisfactory. This paper reports an exciting alternative to conventional methods. Severely overlapping Lamb waves are found to be readily separable by Bayesian parameter estimation. The authors have used linear-chirped Gaussian-windowed sinusoids as models of each Lamb wave mode. The separation algorithm allows each mode to be examined individually.

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6 pages

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Kercel, SW July 19, 2001.

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Description

A persistent problem in the analysis of Lamb wave signatures in experimental data is the fact that several different modes appear simultaneously in the signal. The modes overlap in both the frequency and time domains. Attempts to separate the overlapping Lamb wave signatures by conventional signal processing methods have been unsatisfactory. This paper reports an exciting alternative to conventional methods. Severely overlapping Lamb waves are found to be readily separable by Bayesian parameter estimation. The authors have used linear-chirped Gaussian-windowed sinusoids as models of each Lamb wave mode. The separation algorithm allows each mode to be examined individually.

Physical Description

6 pages

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  • IV International Workshop on Advances in Signal Processing for NonDestructive Evaluation of Material, Conference location not supplied, Conference dates not supplied

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  • Report No.: P01-111281
  • Grant Number: AC05-00OR22725
  • Office of Scientific & Technical Information Report Number: 788520
  • Archival Resource Key: ark:/67531/metadc720929

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Creation Date

  • July 19, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

Description Last Updated

  • Jan. 15, 2016, 12:52 p.m.

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Kercel, SW. Bayesian Separation of Lamb Wave Signatures, article, July 19, 2001; Tennessee. (digital.library.unt.edu/ark:/67531/metadc720929/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.