한국소음진동공학회:학술대회논문집 (Proceedings of the Korean Society for Noise and Vibration Engineering Conference)
- 한국소음진동공학회 2001년도 추계학술대회논문집 II
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- Pages.1182-1188
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- 2001
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- 1598-2548(pISSN)
연속웨이블렛 변환에 의한 립쉬츠 지수 평가를 이용한 결함 진단 : 보의 진동모드를 대상으로
Damage Detection Using the Lipschitz Exponent Estimation by the Continuous Wavelet Transform : Applied to Vibration Mode Shapes in a Beam
초록
The objective of this paper is to show the effectiveness of the wavelet transform by means of its capability to estimate the Lipschitz exponent. In particular, we show that the magnitude of the Lipschitz exponent can be used as a useful tool estimating the damage extent. An effective method based on the Lipschitz exponent is proposed and we present the results investigated both numerically and experimentally. The continuous wavelet transform by a Mexican hat wavelet having two vanishing moments is utilized for the estimation of the Lipschitz exponent.
키워드