基于包络分析的某汽车异响诊断研究  

Research on Diagnosis of Abnormal Noise in a Automobile Based on Envelope Analysis

作　　者：范习民 李凯 FAN Ximin;LI Kai(Anhui Jianghuai Automobile Group Company Limited,Hefei 230601,China)

机构地区：[1]安徽江淮汽车集团股份有限公司,安徽合肥230601

出　　处：《汽车实用技术》2025年第1期65-68,共4页Automobile Applied Technology

摘　　要：文章针对某皮卡怠速车内哒哒异响问题,采用希尔伯特变换与包络分析的方法,首先通过对测量信号带通滤波和包络进行分析,确定了异响频率成分为800~1 000 Hz,得到激励频率为25 Hz;然后对符合频率特性的噪声进行排查,确定了喷油器-燃油管-管夹-车身为主要传递路径;最后通过分析认为采用减振管夹最为简单易行,并对该方案进行了实物验证,哒哒异响消失,效果较好。In this paper,for the problem of click abnormal noise in a pickup truck at idle speed,using Hilbert transform and envelope analysis methods.By first analyzing the band-pass filtering and envelope of the measured signals,the abnormal noise frequency composition is 800~1000 Hz and obtaines an excitation frequency of 25 Hz.Then,the noise conforming to the frequency characteristics is checked and the main transmission path is determined to be injector-fuel pipe-pipe clamp-body.Finally,through the analysis,it is considered that the damping pipe clamp is the most simple and easy to use,and the real verification of the scheme is carried out,the click abnormal noise disappears,and the effect is good.

关 键 词：异响诊断 带通滤波 包络分析 传递路径 

分 类 号：U467.493[机械工程—车辆工程]