이인재 이종민 황요하 허건수 2024-01-21T05:34:39Z 2024-01-21T05:34:39Z 2022-01-10 2005-02 1598-2785 https://pubs.kist.re.kr/handle/201004/136757 Empirical mode decomposition(EMD) method has been recently proposed to analyze non-linear and non-stationary data. This method allows the decomposition of one-dimensional signals into intrinsic mode functions(IMFs) and is used to calculate a meaningful multi-component instantaneous frequency. In this paper, it is assumed that each mode of damped vibration signal could be well separated in the form of IMF by EMD. In this case, we can have a new powerful method to calculate natural frequencies and dampings from damped vibration signal which usually has multiple modes. This proposed method has been verified by both simulation and experiment. The results by EMD method whichhas used only output vibration data are almost identical to the results by FRF method which has used both input and output data, thereby proving usefulness and accuracy of the proposed method. Korean 한국소음진동공학회 경험 모드 분리법을 이용한 감쇠 진동 신호의 분석 Analysis of Damped Vibration Signal Using Empirical Mode Decomposition Method Article 2 한국소음진동공학회논문집, v.15, no.2, pp.192 - 198 한국소음진동공학회논문집 15 2 192 198 N kci ART001097807 Empirical mode decomposition (EMD, 경험 모드 분리법) Hilbert-huang Transform (HHT, 힐버트-후앙 변환) Intrinsic mode function (IMF, 내부 모드 함수) Damping (감쇠)