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Active Noise Control by Using Wavelet Packet and Comparison Experiments

웨이브렛 패킷을 이용한 능동 소음제어 및 비교실험

  • 장재동 (고려대학교 메카트로닉스학과) ;
  • 김영중 (고려대학교 전기전자전파공학부) ;
  • 임묘택 (고려대학교 전기전자전파공학부)
  • Published : 2007.06.01

Abstract

This thesis presents a kind of active noise control(ANC) algorithm for reducing noise due to engine inside a car. The proposed control algorithm is, by using WP(Wavelet Packet), a one improving the instability due to delay of noise transmission and the lack of response ability for the rapid change of noise, which are defects of the existing FXLMS(Filtered-X Least Mean Square) algorithm. The chief character of this system is a thing that faster operation than the FXLMS is implemented by inserting WP in the secondary path. In other words, WP implements parallel operation. Then, the weights of filter in the adaptive algorithm will be updated faster. In addition, because WP have so excellent a resolution, they can process very minute noise. The efficiency of this control algorithm will be demonstrated in the matlab simulation and in the actual experiments by using a Labview program and a car.

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