한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제21권12호
  • /
  • Pages.1104-1111
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  • 2011
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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Filtered Velocity Feedback 제어기를 이용한 양단지지보의 음향파워 저감

Reduction of Sound Radiated Power of Clamped Beams using Filtered Velocity Feedback Controllers

  • 신창주 (부산대학교 대학원 기계공학부) ;
  • 홍진숙 (울산과학대학 디지털기계학부) ;
  • 정의봉 (부산대학교 기계공학부)
  • 투고 : 2011.09.06
  • 심사 : 2011.10.21
  • 발행 : 2011.12.20
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초록

This paper investigates the filtered velocity feedback(FVF) controller for the reduction of the acoustic power radiated from a clamped beam. The instability problem due to the non-collocated sensor/actuator configuration when using PZT actuator should be sorted out. The roll-off property of the FVF controller at high frequency helps to alleviate the instability. The dynamics of clamped beams under forces and moments pair and the FVF controller are first formulated. The formulation of the sound radiated power is followed. The open loop transfer function(OLTF) synthesized with 100 modes is used to determine the stability of the control system. The control performance is finally estimated. The levels of the vibration and the sound radiated power are reduced in the wide bandbelow the tuning mode of the FVF controller.

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참고문헌

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