| 有源噪声控制次级声源的非线性建模 |
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| 引用本文： | 聂永红,程军圣.有源噪声控制次级声源的非线性建模[J].振动工程学报,2011,24(5). |
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| 作者姓名： | 聂永红 程军圣 |
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| 作者单位： | 湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙,410082 |
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| 基金项目： | 湖南大学汽车车身先进设计制造国家重点实验室自主研究课题 |
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| 摘 要： | 基于电动扬声器的顺性、磁力因子和音圈自感三个非线性参数,建立了基于电力声类比线路方法的次级声源非线性时域模型.采用该模型对次级声源总谐波失真(THD)进行仿真,并与测试结果进行比较,结果表明在较低频率范围、较大输入信号幅值的情况下,该非线性模型是可行的.将该模型引入有源噪声控制系统,并以滤波-XLMS算法为例,对采用次级声源理想模型、线性时域模型和非线性时域模型的控制系统分别进行仿真,结果表明采用非线性模型系统的降噪量远低于采用其他模型的系统,并且非线性失真度大小对降噪量也具有明显的影响.
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| 关 键 词： | 有源噪声控制 次级声源 类比线路法 非线性失真 |
Nonlinearity modeling of secondary sound source in active noise control |
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| NIE Yong-hong,CHENG Jun-sheng.Nonlinearity modeling of secondary sound source in active noise control[J].Journal of Vibration Engineering,2011,24(5). |
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| Authors: | NIE Yong-hong CHENG Jun-sheng |
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| Affiliation: | NIE Yong-hong,CHENG Jun-sheng(The State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hunan University,Changsha 410082,China) |
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| Abstract: | The nonlinearity of secondary sound source based on analogue circuits of electrical,mechanical and acoustical systems is modeled in the time domain by considering three nonlinear parameters of electrodynamic loudspeaker including compliance,force factor and voice coil inductance.The total harmonic distortion(THD) of secondary sound source is simulated by using this model and compared with the measured results.It shows that the nonlinear model is feasible while the frequency of input signal is low and its am... |
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| Keywords: | active noise control secondary sound source analogue circuits nonlinear distortion |
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