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구조물에서 방사되는 소음을 저감하기 위한 능동구조음향제어

Active Structural Acoustic Control for Reduction of Radiated Sound from Structure

  • 오재응 (한양대학교 공과대학 기계공학부) ;
  • 홍진석 (한양대학교 대학원 정밀기계공학과)
  • O, Jae-Eung (Dept.of Mechanical Engineering, College of Engineering, Hanyang University) ;
  • Hong, Jin-Seok (Dept. of Precision Mechanical Engineering, Hanyang University)
  • 발행 : 2001.09.01

초록

Active control of sound radiation from a vibrating rectangular plate by a steady-state harmonic point force disturbance is experimentally studied. Structural excitation is achieved by two piezoceramic actuators mounted on the panel. Two accelerometers are implemented as error sensors. Estimated radiated sound signals using vibro-acoustic path transfer function are used as error signals. The vibro-acoustic path transfer function represents system between accelerometers and microphones. The approach is based on a multi-channel filtered-x LMS algorithm. The results shows that attenuation of sound levels of 11dB, 10dB is achieved.

키워드

참고문헌

  1. 박수홍, 김홍섭, 홍진석, 오재응, 1997, 'Filtered-x LMS 알고리듬을 이용한 유연한 외팔보의 능동진동제어,' 한국정밀공학회 논문집, 제14권, 제3호, pp. 107-113
  2. 김흥섭, 홍진석, 오재웅, 1997, '덕트에서 온라인 적응 알고리듬을 이용한 능동소음 제어,' 대한기계학회 논문집, 제21권 제8호, pp. 1332-1338
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