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| 机车驾驶室中自适应有源降噪系统的研究 | |
| 引用本文： | 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]. 应用声学, 2003, 22(3): 33-38 |
| 作者姓名： | 乐恺 安军社 钟延炯 |
| 作者单位： | 1. 北京科技大学机械工程学院,北京,100083 2. 中国科学研究院空间科学与应用研究中心,北京,100084 3. 北京科技大学信息工程学院,北京,100083 |
| 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IMS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。 |
| 关 键 词： | 驾驶室 主动降噪 自适应滤波 伪随机相关辩识 电力机车 轴流风机 有源降噪系统 |
Adaptive active noise control in driver''''s cab |
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| YUE Kai,AN Junshe and ZHONG Yanjiong. Adaptive active noise control in driver''''s cab[J]. Applied Acoustics(China), 2003, 22(3): 33-38 | |
| Authors: | YUE Kai AN Junshe ZHONG Yanjiong |
| Affiliation: | Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083;Centre for Space Science and Apply Research, Chinese Academy of Sciences, Beijing 100084;Information Engineering School, University of Science and Technology Beijing, Beijing 100083 |
| Abstract: | 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. |
| Keywords: | Active noise control Adaptive filtering Pseudo-random correlation iden- tification |
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