Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2007.10a
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- Pages.433-434
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- 2007
Adaptive Active Noise Control in a Duct Using Improved SLMS Algorithms
개선된 SLMS 알고리즘을 이용한 덕트 내에서의 능동소음제어
- Seo, Sung-Dae (Dankook University) ;
- Nam, Ju-Hyung (Seoul National University) ;
- Ahn, Dong-Jun (Ajou Motor College) ;
- Nam, Hyun-Do (Dankook University)
- Published : 2007.10.26
Abstract
In this paper, active control of noise in a HVAC duct is considered. Most adaptive control filters have used FIR structures based on filtered-x LMS algorithms. But, the IIR structures are more desirable for the active control of duct noise in order to remove the poles introduced by the acoustic feedback and presented an algorithm to adjust the coefficients of an IIR filter using the recursive least mean square (RLMS) algorithm. A smoothed LMS algorithm is proposed to improve a convergent speed of filter parameters when the noise is wide band and power of input is time varying. And computer simulations have performed to show the effectiveness of the proposed algorithm.
Keywords