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Enhanced Multi-Channel Adaptive Noise Control Compensating Nonlinear Distortions

비선형 왜곡을 보상하는 향상된 다채널 적응 소음 제어

Oh Sang Kwon1*
권 오상1*
1Department of Electrical and Electronics Engineering, The Cyber University of Korea
*교신저자. *Corresponding Author. 
31 January 2015. pp. 46-51
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Abstract

In fields of controlling acoustical noises, the overall adaptive control system is nonlinear due to the loudspeaker, amplifiers, converters, and microphones, etc. and the performance of noise control is decreased by the extent of nonlinearities, so an adaptive control system compensating nonlinear distortions is needed. In this paper, a new multi-channel adaptive noise controller was proposed, which was combined with the adaptive compensator to effectively linearize nonlinear distortions in the overall adaptive control system. Through computer simulations, the proposed adaptive compensator could linearize the nonlinear distortions and the proposed noise controller had better capability of controlling the noises than the conventional LMS controller.

Keywords
Adaptive noise control
Linearization
Nonlinear distortion

음향학적인 소음을 제어하는 영역에서는 스피커, 증폭기, 변환기, 그리고 마이크로폰 등에 의해서 전체 적응 제어 시스템이 비선형이므로 소음 제어 성능은 비선형성 정도에 의해서 결정된다. 따라서 비선형성 왜곡을 보상하는 적응 제어 시스템이 필요하며, 본 논문에서는 비선형성 왜곡을 효과적으로 선형화하는 적응 보상기와 결합한 새로운 다채널 적응 소음 제어기를 제안하였다. 모의실험을 통해 제안한 적응 보상기가 비선형왜곡을 선형화하고 기존의 LMS 제어기보다 소음을 감쇠하는데 월등함을 증명하였다.

키워드
적응소음제어
선형화
비선형 왜곡
References
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6.D. D. Rife, “Modulation transfer function measurement with maximum-length sequences,” J. Audio Eng. 40, 779-789 (1992).
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7.O. S. Kwon, “Robust active noise controller with hybrid adaptive nonlinear compensator” (in Korean), J. Acoust. Soc. Kr. 28, 16-22 (2009).
Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 34
  • No :1
  • Pages :46-51
  • Received Date : 2014-08-04
  • Revised Date : 2014-09-01
  • Accepted Date : 2014-10-31
  • DOI :https://doi.org/10.7776/ASK.2015.34.1.046
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