The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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A New Adaptive Controller Compensating Nonlinear Distortions of a Speaker

스피커의 비선형 왜곡을 보정하는 새로운 적응 제어기

  • 권오상 (남서울 대학교 전자공학과)
  • Received : 2014.08.13
  • Accepted : 2014.10.17
  • Published : 2014.10.31
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Abstract

In general, a speaker generates nonlinear distortions owing to a design principle, manufacturing process, and so on, which decreases and changes a sound quality. So, if the speaker is linearized by compensating these nonlinear distortions, the sound quality and satisfaction can be increased. In this paper, a new adaptive controller was proposed to be applied for compensating nonlinear distortions of a speaker. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional adaptive controller and proposed adaptive controller, to be applied for linearizing the speaker with nonlinear distortions. Also, the simulations results demonstrated that the proposed adaptive controller may have faster convergence speed and better capability of compensating the nonlinear distortion than the conventional adaptive controller with nearly equal computation complexity.

일반적으로 스피커는 설계 원리, 제작 과정 등의 요인에 의하여 비선형 왜곡을 발생하게 되는데, 비선형 왜곡으로 인하여 음질이 떨어지거나 변형하게 된다. 따라서 이러한 비선형 왜곡을 보정하여 스피커를 선형화한다면 보다 향상된 양질의 소리를 청취하거나 만족도를 높일 수 있다. 본 논문에서는 스피커의 비선형 왜곡을 보정하기 위해서 새로운 적응 제어기를 제안하였다. 분석적인 해석과 함께 컴퓨터 모의실험을 통해 기존의 적응 제어기와 제안된 적응 제어기가 모두 비선형 왜곡을 지닌 스피커 시스템을 선형화하는데 적용할 수 있다는 것을 확인하였다. 또한, 제안된 적응 제어기가 거의 동일한 계산 양으로 기존의 적응 제어기보다 비선형 왜곡을 보정하는데 빠른 수렴속도와 우수한 성능을 가지고 있다는 사실을 확인하였다.

Keywords

References

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