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Characteristics of Real-time Implementation using the Advanced System Controller in ANC Systems

개선된 시스템 제어기를 사용한 능동소음제어의 실시간 구현 특성

Moon, Hak-ryong;Shon, Jin-geun
문학룡;손진근

  • Received : 2015.10.27
  • Accepted : 2015.11.24
  • Published : 2015.12.01

Abstract

Active noise control (ANC) is a method of cancelling a noise signal in an acoustic cavity by generating an appropriate anti-noise signal via canceling loudspeakers. The continuous progress of ANC involves the development of improved adaptive signal processing algorithms, transducers, and DSP hardware. In this paper, the convergence behavior and the stability of the FxLMS algorithm in ANC systems with real-time implementation is proposed. Specially, The advanced DSP H/W with dual core(DSP+ARM) and API(application programming interface) S/W programming was developed to improve the real-time implementation performance under the FxLMS algorithms of input noise such as road noise environment. The experimental results are found to be in good agreement with the theoretical predictions.

Keywords

ANC(active noise control);Adaptive signal processing;Anti-noise signal;Convergence behavior;FxLMS(filterd-x least mean square)

References

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Acknowledgement

Supported by : 한국건설기술연구원