안정화된 다중채널 순환 LMS 필터를 이용한 덕트의 능동소음제어 = Active Control of Noise in Ducts Using Stabilized Multi-Channel RLMS Filters

다국어 초록 (Multilingual Abstract)

An adaptive IIR filter in ANC(Active Noise Control) systems is more effective than an adaptive Fill filter when acoustic feedback exists, in which cause an order of an adaptive Fill filter must be very large if some of poles of the ideal control filter are near the unit circle. But the IIR filters may have stability problems especially when the adaptive algorithm for adaptive filters is not yet converged.
In this paper, a stabilized multi-channel recursive LMS (MCRLMS) algorithm for an adaptive multi-channel IIR filter is presented. RLMS algorithms usually diverge before the algorithm is not yet converged. So, in the beginning of the ANC system, the stability of the RLMS algorithms could be improved by pulling the poles of the IIR filter to the center of the unit circle, and returning the poles to their original positions after the filter converges.
Computer simulations and experiments for dipole ducts using a TMS320C32 digital signal processor have performed to show the effectiveness of a proposed algorithm.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. MCRLMS 알고리즘
• 3. 이중극 덕트의 모델링
• 4. 컴퓨터 시뮬레이션
• 5. 실험 및 검토
• 6. 결론
• 감사의 글
• 참고문헌

참고문헌 (Reference)

1 Swinbanks M. A, "The active control of sound propagation in long ducts Journal of Sound and Vibration" 411-4361973,

2 Nam H.D, "Satbilized recursive LMS algorithms for active noise control" 467-473, 2003.

3 Elliot S. J, "Models for describing active noise control in ducts" u.k.1984.

4 Kuo S.M, "Active Noise Control System" John Wiley and Sons. Inc. 1996.