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Transient Characteristics Analysis of Structural Systems Undergoing Impact Employing Hilbert-Huang Transformation

힐버트 황 변환을 이용한 충격을 받는 시스템의 과도특성 분석

  • 이승규 (한양대학교 대학원 기계공학과) ;
  • 유홍희 (한양대학교 기계공학부)
  • Published : 2009.12.01

Abstract

Transient characteristics of a signal can be effectively exhibited in time-frequency domain. Hilbert-Huang Transform (HHT) is one of the time-frequency domain analysis methods. HHT is known for its several advantages over other signal analysis methods. The capability of analyzing non-stationary or nonlinear characteristics of a signal is the primary advantage of HHT. Moreover, it is known that HHT can provide fine resolution in high frequency region and handle large size data efficiently. In this study, the effectiveness of Hilbert-Huang transform is illustrated by employing structural systems undergoing impact. A simple discrete system and an axially oscillating cantilever beam undertaking periodic impulsive force are chosen to show the effectiveness of HHT.

Keywords

Hilbert-Huang Transformation;Signal Analysis;Transient Characteristics;Impact

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