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http://dx.doi.org/10.5302/J.ICROS.2007.13.6.547

Active Noise Control by Using Wavelet Packet and Comparison Experiments  

Jang, Jae-Dong (고려대학교 메카트로닉스학과)
Kim, Young-Joong (고려대학교 전기전자전파공학부)
Lim, Myo-Taeg (고려대학교 전기전자전파공학부)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.13, no.6, 2007 , pp. 547-554 More about this Journal
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.
Keywords
Active Noise Control(ANC); Wavelet Packet(WP); Filtered-X Least Mean Square(FXLMS);
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