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개선된 SLMS 알고리즘을 이용한 덕트 내에서의 능동소음제어
서성대(Sung Dae Seo),남주형(Ju Hyung Nam),안동준(Dong Jun Ahn),남현도(Hyun Do Nam) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
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.