Bouraou N., Tyapchenko A. Statistical Characterization of Estimates of Relative Crack Dimensions Based on the Method of Higher Harmonics

Monday, 25 July 2011 08:58 administrator
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Fatigue cracks are diagnosed and characterized using a vector of parameters composed of the ratios between spectral amplitudes of the higher and fundamental harmonics in inherent acoustic modes of an object. Using the method of maximal likelihood, we have obtained estimates of the relative crack dimensions and analyzed their statistical characteristics depending on the composition of the parameter vector and noise intensity in measurements.

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