汽车车内制动噪声主动控制  

Active Noise Control of Automotive Interior Braking Noise

作　　者：冯天培[1] 孙跃东[1] 王岩松[2] 刘宁宁[2] 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海工程技术大学汽车工程学院,上海201620

出　　处：《噪声与振动控制》2016年第1期75-78,共4页Noise and Vibration Control

摘　　要：部分汽车制动时的车内噪声以低频成分占主导。低频噪声能量大,车内较强的低频制动噪声会给乘员带来不舒适的乘坐感受,降低车辆的乘坐舒适性。采集三辆轿车车内60 km/h紧急制动时司机位双耳处噪声信号并进行时-频域分析,分析结果与实车试验乘坐感受一致,接着运用低频噪声消噪效果较好的主动噪声控制方法,结合自适应LMS算法对样本信号进行消噪仿真实验,制动噪声低频部分得到较大的抑制,特别是在20 Hz^50 Hz低频带内,噪声能量衰减明显。Low-frequency components of braking noise usually dominate the internal noise for some kinds of automobiles. Since the low-frequency noise has high energy, the strong interior noise will reduce the comfort for the passengers. In this paper, the braking noises at the driver’s ears in three different cars travelling at 60km/h in emergency braking were collected and analyzed in time-frequency domain. Results of analysis agreed well with the real ride-perception in a testing car. Then, the active braking noise control simulation using adaptive LMS algorithm was implemented. The results show that the low-frequency noise, especially in the range of 20 Hz-50 Hz, is greatly eliminated.

关 键 词：声学 制动噪声 汽车车内 时频域分析 主动噪声控制 LMS算法 

分 类 号：U467.493[机械工程—车辆工程]