대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)
- 제20권5호
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- Pages.1573-1581
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- 1996
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- 1226-4873(pISSN)
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- 2288-5226(eISSN)
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자기감응 액추에이터를 이용한 능동소음제어
Active Noise Control Using Sensory Actuator
초록
This paper present as experimental demonstratio of DSP and a sensory actuator that is used to actively control sound transmission/radiation through a vibrating plate. A plane acoustic wave incident on a clamped, thin circular plate was used as a noise source, and a sensory actuator bounded to the plate was used to control and sense vibration of the plate. The sound transmission reduction problem was tranformed as a structural vibration control problem that actively control the structural vibration modes coupled to acoustic modes. The results show that the first structural vibration mode is controlled with a reduction of 78 percent in the displacement and velocity of the plate. This corresponds to a 13dB reduction in the acoustic response. These experimental results indicate that a sensory actuator bounded to the plate can be employed to attenuate the sound transmitted to radiated from the plate.
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