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http://dx.doi.org/10.5050/KSNVN.2005.15.4.382

Matching Pursuit Approach for Guided Wave-based Damage Inspection  

Hong, Jin-Chul (서울대학교 대학원 기계항공공학부)
Sun, Kyung-Ho (서울대학교 대학원 기계항공공학부)
Kim, Yoon-Young (서울대학교 기계항공공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.15, no.4, 2005 , pp. 382-387 More about this Journal
Abstract
For successful guided-wave damage inspection, the appropriate signal processing of measured wave signals is very important. The objective of this paper is to introduce an efficient signal processing technique especially suitable for the guided-waves used for damage detection. The key idea of this technique is to model guided-waves by chirp functions of special form considering the dispersion phenomenon. To determine the parameter of the chirp functions simulating guided-waves, the matching pursuit algorithm is employed. The damage information in waveguides can be extracted by pulse-characterizing parameters. The effectiveness of present method is checked with the guided wave-based damage inspection.
Keywords
Guided-wave; Dispersion; Gabor Function; Chirp Function; Matching Pursuit; Damage;
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