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Journal of mechanical science and technology v.24 no.6, 2010년, pp.1329 - 1335   SCIE 피인용횟수: 1
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Measuring displacement signal with an accelerometer

Han, Sang-Bo    (School of Mechanical Engineering and Automation, Kyungnam University  );
  • 초록

    An effective and simple way to reconstruct displacement signal from a measured acceleration signal is proposed in this paper. To reconstruct displacement signal by means of double-integrating the time domain acceleration signal, the Nyquist frequency of the digital sampling of the acceleration signal should be much higher than the highest frequency component of the signal. On the other hand, to reconstruct displacement signal by taking the inverse Fourier transform, the magnitude of the significant frequency components of the Fourier transform of the acceleration signal should be greater than the 6 dB increment line along the frequency axis. With a predetermined resolution in time and frequency domain, determined by the sampling rate to measure and record the original signal, reconstructing high-frequency signals in the time domain and reconstructing low-frequency signals in the frequency domain will produce biased errors. Furthermore, because of the DC components inevitably included in the sampling process, low-frequency components of the signals are overestimated when displacement signals are reconstructed from the Fourier transform of the acceleration signal. The proposed method utilizes curve-fitting around the significant frequency components of the Fourier transform of the acceleration signal before it is inverse-Fourier transformed. Curve-fitting around the dominant frequency components provides much better results than simply ignoring the insignificant frequency components of the signal.


  • 주제어

    Acceleration signal .   Curve-fitting .   Displacement signal .   Inverse Fourier transform .   Nyquist frequency .   Sampling rate.  

  • 참고문헌 (13)

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    12. R. L. Burden, J. D. Faires and A. C. Reynolds, Numerical Analysis, Prindle, Weber & Schmidt, (1979). 
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  • 이 논문을 인용한 문헌 (1)

    1. 2011. "" Journal of mechanical science and technology, 25(12): 2987~2993     

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  • 한상보 (28)

    1. 1996 "구조물-가진기 상호작용에 의한 공진주파수 변동에 대한 해석" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 20 (7): 2108~2117    
    2. 1997 "PPF 제어기법을 이용한 다중 모드 강제 진동의 능동 진동 제어" 소음진동 = Journal of KSNVE 7 (6): 1007~1013    
    3. 1998 "가진기의 동적 거동 해석" 소음진동 = Journal of KSNVE 8 (1): 75~80    
    4. 1998 "복합재료내의 계면 접착 특성에 따른 지능형 구조물의 진동제어에 관한 연구" 소음진동 = Journal of KSNVE 8 (6): 1093~1102    
    5. 2001 "지표면의 반사특성을 고려한 환경소음 예측" 소음진동 = Journal of KSNVE 11 (2): 329~335    
    6. 2003 "Retrieving the Time History of Displacement from Measured Acceleration Signal" KSME international journal 17 (2): 197~206    
    7. 2003 "전기점성유체와 압전세라믹을 이용한 복합지능구조물의 진동제어" 한국소음진동공학회논문집 = Transactions of the Korean society for noise and vibration engineering 13 (8): 612~618    
    8. 2004 "양변위 되먹임 제어기의 안정성, 제어 성능 및 설계 방법" 한국소음진동공학회논문집 = Transactions of the Korean society for noise and vibration engineering 14 (3): 208~213    
    9. 2005 "독립좌표연성법을 이용한 직사각형 구멍을 갖는 직사각형 평판의 자유진동해석" 한국소음진동공학회논문집 = Transactions of the Korean society for noise and vibration engineering 15 (12): 1398~1407    
    10. 2006 "독립좌표연성법을 이용한 원형 구멍을 갖는 단순지지 직사각형 평판의 자유진동해석" 한국소음진동공학회논문집 = Transactions of the Korean society for noise and vibration engineering 16 (6): 643~650    

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