汽车空调噪声有源控制的参考传感器布放研究
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摘要
采用有源噪声控制方法来降低汽车内部噪声时,为使参考信号与汽车暖通空调系统噪声之间具有较好的相关性,针对暖通空调系统参考传感器的布放进行研究。分别选取暖通空调系统上六个不同位置点的加速度作为参考信号,并采用滤波-X LMS算法对有源控制系统的噪声控制效果进行仿真和对比。结果表明,当加速度计布置在空调系统的左端面或左上出风口附近时,控制系统能在392Hz和450~550Hz的频率范围内分别取得12d B和5d B的降噪量。因此,合理选择控制系统参考传感器的布放位置,能够更有效地降低暖通空调系统的低频噪声水平。
The distribution of reference sensors for Heating, Ventilation and Air Conditioning(HVAC) system is studied in order to ensure a good correlation between the reference signal and HVAC system noise while the active noise control is used to reduce the noise level inside the automotive. The effects of active noise control are simulated by using Filtered-X LMS algorithm and compared among the six cases using the acceleration of different positions on HVAC system as the reference signals. The results show that the control system can reduce the noise by 12 d B and 5 d B at the frequencies of 392 Hz and 450~550 Hz respectively while the accelerometer is located on the left end surface or near the upper left air outlet of HVAC system. Therefore, the reasonable arrangement of reference sensor for the active noise control system can reduce the low-frequency noise of HVAC system more effectively.
The distribution of reference sensors for Heating, Ventilation and Air Conditioning(HVAC) system is studied in order to ensure a good correlation between the reference signal and HVAC system noise while the active noise control is used to reduce the noise level inside the automotive. The effects of active noise control are simulated by using Filtered-X LMS algorithm and compared among the six cases using the acceleration of different positions on HVAC system as the reference signals. The results show that the control system can reduce the noise by 12 d B and 5 d B at the frequencies of 392 Hz and 450~550 Hz respectively while the accelerometer is located on the left end surface or near the upper left air outlet of HVAC system. Therefore, the reasonable arrangement of reference sensor for the active noise control system can reduce the low-frequency noise of HVAC system more effectively.
引文
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[9]刘学广,王登峰,刘宗巍等.车内多次级声源自适应有源消声研究[J].农业机械学报,2005,36(2):27-30.
[10]De Oliveira L P R,Janssens K,Gajdatsy P,et al.Active sound quality control of engine induced cavity noise[J].Mechanical Systems and Signal Processing,2009,23(2):476-488.
[11]姜顺明,陈南.以响度为度量的车内噪声有源控制[J].汽车工程,2008,30(6):479-505.
[12]Xu W.Vehicle noise and vibration refinement[M].UK:Woodhead Publishing,2010:234-236.
[2]Ayar A,Ambs R,Capellmann C,et al.Prediction of flow-induced noise in automotive HVAC systems using a combined CFD/CA approach[R].SAE Technical Paper,2005.
[3]Ricardo P L,Stephan P,Samir N Y.A sound qualitybased investigation of the HVAC system noise of an automobile model[J].Applied Acoustics,2009,70(4):636-645.
[4]汪怡平,谷正气,杨雪等.汽车空调出风管道气动噪声分析与控制[J].湖南大学学报(自然科学版),2010,37(3):24-28.
[5]程勉宏,刘刚.汽车空调风道设计对车内噪声的影响[J].沈阳航空工业学院学报,2005,22(4):37-39.
[6]康强,左曙光,韩惠君.汽车空调系统离心风机气动噪声数值计算[J].江苏大学学报(自然科学版),2013,34(1):1-6.
[7]Humbad N.汽车供热通风及空调系统噪声测试与分析[J].汽车工程学报,2011,1(4):299-309.
[8]王登峰,刘学广,刘宗巍等.车内自适应有源消声系统次级声源布放试验[J].中国公路学报,2006,19(3):122-126.
[9]刘学广,王登峰,刘宗巍等.车内多次级声源自适应有源消声研究[J].农业机械学报,2005,36(2):27-30.
[10]De Oliveira L P R,Janssens K,Gajdatsy P,et al.Active sound quality control of engine induced cavity noise[J].Mechanical Systems and Signal Processing,2009,23(2):476-488.
[11]姜顺明,陈南.以响度为度量的车内噪声有源控制[J].汽车工程,2008,30(6):479-505.
[12]Xu W.Vehicle noise and vibration refinement[M].UK:Woodhead Publishing,2010:234-236.