车外加速噪声的传递特性模型及声源识别  

Transfer Characteristics Model and Noise Sources Identification for Accelerated Vehicle Exterior Noise

作　　者：郑四发[1] 郝鹏[1] 李西朝[1] 李克强[1] 连小珉[1] 

机构地区：[1]清华大学,汽车安全与节能国家重点实验室,北京100084

出　　处：《汽车工程》2010年第5期439-442,共4页Automotive Engineering

基　　金：国家863计划项目(2006AA110105)资助

摘　　要：提出了一种描述汽车主要声源、振源与车外噪声的传递特性模型。根据行驶中汽车的主要声源、振源参考点信号和车外加速噪声测量点信号,通过传递特性分析,定量确定了运动车辆的噪声源对车外噪声的贡献,采用主成份分析法提高声源识别精度。实车试验结果表明,利用传递特性模型可以确定车外加速噪声的主要振源、声源及其贡献。A transfer characteristics model is proposed for describing major noise and vibration sources and exterior noise of vehicles.Based on signals at reference points of main noise and vibration sources in vehicle and signals at measuring point of exterior acceleration noise,and by transfer characteristic analysis,the contributions of noise sources in moving vehicle to exterior noise of vehicle are quantitatively determined,and principal component analysis is used to raise the identification accuracy of noise source.The results of real vehicle test show that utilizing transfer characteristics model can identify the main noise and vibration sources and their contribution to exterior acceleration noise of vehicle.

关 键 词：车外加速噪声 传递特性模型 声源识别 主成份分析 

分 类 号：U467.493[机械工程—车辆工程]