面向车内噪声控制的次级通路建模与验证  

Secondary Path Modeling and Validation for Vehicle Interior Noise Control

作　　者：张希玉 张立军[1,2] 孟德建[1,2] Zhang Xiyu;Zhang Lijun;Meng Dejian(School of Automotive Engineering, Tongji University, Shanghai 201804;Collaborative Innovation Center for Intelligent New Energy Vehicle, Tongji University, Shanghai 201804)

机构地区：[1]同济大学汽车学院,上海201804 [2]同济大学智能型新能源协同创新中心,上海201804

出　　处：《汽车工程》2019年第10期1204-1209,1227,共7页Automotive Engineering

摘　　要：针对车内噪声主动控制中离线次级通路模型的正确性和准确性难以保证,次级通路线性时不变假设的有效性缺乏验证的问题,提出一种次级通路建模与验证的方法。首先,通过次级通路纯时延测量和离线次级通路模型辨识,在次级通路线性时不变假设前提下实现对次级通路的高精度建模。然后,以扫频信号作为输入,在目标频段内对次级通路模型进行离线检验,检验模型的正确性和准确性。最后,以随机信号作为输入,以部分扬声器作为激励源激起车内噪声,以剩余扬声器作为次级源对噪声进行控制,实现了对次级通路模型正确性及其线性时不变假设有效性的检验。For the problem that the correctness and accuracy of the offline secondary path model for active vehicle interior noise control are difficult to guarantee and the validity of the linear time-invariant hypothesis of the secondary path lacks verification,a method of secondary path modeling and verification is proposed. Firstly, through the secondary path dead time delay measurement and the offline secondary path model identification, the high-precision modeling of the secondary path is realized under the linear time-invariant assumption of the secondary path. Then, using the sweep frequency signal as the input, the secondary path model is tested offline in the target frequency band to validate the correctness and accuracy of the model. Finally, with the random signal as the input, some loudspeakers as the excitation source to stimulate the interior noise and the remaining loudspeakers as the secondary source to control the noise, the correctness of the secondary path model and the validity of its linear time-invariant hypothesis are tested.

关 键 词：车内噪声 次级通路建模 次级通路验证 噪声主动控制 

分 类 号：U467.493[机械工程—车辆工程]