Source Identification of Non-Stationary Sound.Vibration Signals Using Multi-Dimensional Spectral Analysis Method

다차원 스펙트럼 해석법을 이용한 비정상 소음.진동 신호의 소음원 규명

  • 심현진 (한양대학교 기계공학과) ;
  • 이해진 (한양대학교 기계공학과) ;
  • 이유엽 (호원대학교 자동차 기계공학부) ;
  • 이정윤 (경기대학교 기계시스템디자인공학부) ;
  • 오재응 (한양대학교 기계공학부)
  • Published : 2006.09.01


In this paper, time-frequency analysis and multi-dimensional spectral analysis methods are applied to source identification and diagnostic of non-stationary sound vibration signals. By checking the coherences for concerned time, this simulation is very well coincident to expected results. The proposed method analyzes the signal instantaneously in both time and frequency domains. The MDSA (Multiple Dimensional Spectral Analysis) analyzes the signal in the plane of instantaneous time and instantaneous frequency at the same time. And it was verified by using the 1500cc passenger car which is accelerated from 70Hz to 95Hz in 4 seconds, the proposed method is effective in determining the vehicle diagnostic problems.


Time-Frequency Analysis;Coherence;MDSA;Source Identification;Non-Stationary Signal


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