| 简谐噪声在三维空间的主动控制及仿真 |
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| 引用本文： | 张穴,张方. 简谐噪声在三维空间的主动控制及仿真[J]. 国外电子测量技术, 2011, 30(2): 20-23 |
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| 作者姓名： | 张穴 张方 |
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| 作者单位： | 南京航空航天大学振动工程研究所,南京,210016 |
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| 摘 要： | 三维空间的噪声主动控制技术是近年来噪声控制领域研究的一个热点问题,对于降低飞机或车辆里的噪声水平有很大意义。提出了一种对于简谐噪声在三维空间进行精确控制的方法,先对三维空间建立几何模型,并且对几何模型进行网格划分,误差准则取所有节点处的声压平方和,然后在误差准则取得最小值的情况下,计算出次级声源的强度。最后对基于该方法设计的噪声主动控制系统进行仿真,仿真结果表明系统有15～30dB的最大降噪量,从而验证了该方法的有效性。
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| 关 键 词： | 三维空间 噪声主动控制 误差准则 点源强度 仿真 |
Active harmonic noise control in three-dimensional space and simulation |
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| Zhang Xue,Zhang Fang. Active harmonic noise control in three-dimensional space and simulation[J]. Foreign Electronic Measurement Technology, 2011, 30(2): 20-23 |
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| Authors: | Zhang Xue Zhang Fang |
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| Affiliation: | Zhang Xue Zhang Fang(Institute of Vibration Engineering Research,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China) |
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| Abstract: | The 3D space active noise control technology is a hot spot issue in the field of noise control,which has great significance in reducing the noise of aircraft or vehicle.Put forward a method of precise control harmonic noise in 3D space.First of all,modeling and meshing for the 3D space.The quadratic sum of sound pressure of all nodes is used as an error criterion.Then,we obtain the secondary sound source strength in the case that the error criterion is minimal.Finally,we simulate the active noise control system based on this method.The simulation results show that the system can get the largest noise reduction amount up to 15~30 dB,which validates the effectiveness of this method. |
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| Keywords: | 3D space active noise control error criterion source strength simulation |
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