| 乐恺,安军社,钟延炯.机车驾驶室中自适应有源降噪系统的研究[J].,2003,22(3):33-38 |
| 机车驾驶室中自适应有源降噪系统的研究 |
| Adaptive active noise control in driver’s cab |
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| 中文摘要: |
| 根据机车驾驶室中噪声特征的分析结果,提出了采用FIR滤波器的自适应有源降噪(ANNC)系统。为消除机车驾驶室中严重的背景噪声干扰影响,应用伪随机相关法对驾驶室中的噪声脉冲响应进行测量。通过数字仿真研究,对基于LMS算法的ANNC系统的关键参数进行了寻优。最后,在实际声场中建立了实时双通道ANNC系统并进行了相关的实验验证。仿真与实验的结果证明了本文提出的AANC系统的可行性和有效性。 |
| 英文摘要: |
| Based on the analysis of the characteristics of practical noises in a driving cab, this paper presents an adaptive active noise control system with a FIR filter more stable than an IIR filter. In order to eliminate the serious interference of the background noise, the pseudo-random correlation identification method is applied to measure the noise impulse response in a room. Moreover, the effects of crucial parameters on the noise decrement are analyzed through numerical simulations of the ANNC system using the LMS algorithm to optimize the parameters. Finally, the real-time acoustic ANNC system is set up, and relevant experiments are conducted. The result proves the adopted AANC system to be feasible and effective. |
| DOI：10.11684/j.issn.1000-310X.2003.03.012 |
| 中文关键词: 主动降噪 自适应滤波 伪随机相关辨识 |
| 英文关键词: Active noise control Adaptive filtering Pseudo-random correlation iden- tification |
| 基金项目: |
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