대한전기학회논문지:전기물성ㆍ응용부문C (The Transactions of the Korean Institute of Electrical Engineers C)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

적응필터링 기법을 사용하여 자체진동을 보상하는 레이저 도플러 진동측정계

Body Vibration Compensated Laser Doppler Vibrometer using Adaptive Filtering

  • 최성욱 (중앙대학 전기전자공학부) ;
  • 조영균 (중앙대학 전기전자공학부) ;
  • 김호성 (중앙대학 전기전자공학부) ;
  • 장태규 (중앙대학 전기전자공학부) ;
  • 강민식 (경원대학 기계공학과)
  • 발행 : 2003.11.01
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초록

A novel dual beam heterodyne Laser Doppler Vibrometer (LDV) in conjunction with FM demodulators, which utilizes a residual beam to eliminate the perturbationdue due to the vibrometer body vibration without any external reference surface, has been developed. Residual laser beam from the beam splitter is used to pick up the vibration of damper, which is mounted in the vibrometer, and combined with reference beam at the photodetector. The output signal of this detector and main signal are processed to extract the object vibration, using a least mean square adaptive algorithm. It is shown experimentally that the body vibration of 1-5 Hz can be effectively removed from the measured signal using DSP technology to extract unperturbed 100 Hz original signal.

키워드

참고문헌

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