Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Matching Pursuit Approach for Guided Wave-based Damage Inspection

유도 초음파 이용 결함 진단을 위한 정합추적 기법

  • 홍진철 (서울대학교 대학원 기계항공공학부) ;
  • 선경호 (서울대학교 대학원 기계항공공학부) ;
  • 김윤영 (서울대학교 기계항공공학부)
  • Published : 2005.04.01
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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.

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References

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