汽车驱动桥振动噪声检测系统

The Vibration and Noise Detecting System for Automotive Drive Axle

“汽车机械式变速器台架试验评价指标”(JBn4125—85)规定汽车驱动桥在出厂前均要进行噪声测试。而装配车间一般具有很强且变化的背景噪声,无法测量驱动桥的噪声。介绍了通过采用二次修正背景噪声的方法,解决强噪声环境下测量汽车驱动桥噪声的问题,同时对振动加速度也进行了测量。系统软件包含系统配置、自动检测、数据管理、信号分析、标定和帮助等模块。采用基于对组件模型的软件开发方式快速构成系统原型,加以剪裁和配置,形成了满足用户要求的系统。

Bench test evaluation metrics of auto motive mechanical transmissions(JBn4125—85)require noise test-ing and measuring for automotive drive axles prior to their ex works.Because of the intense and varying background noise in assembly plant,noises of the drive axle can not be measured.The secondary correction method for background noises is ap plied to measure drive axle noises as well as vibration acceleration under in tense noise context.The system software con sists of the system configuration module,the automatic detection module,the data management module,the signal anal-ysis module,the calibration module and the help module.The component-based software development method is ap plied to rapidly set up the system prototype and then produce the final system conforming to requirements of the customers by trimming and configuration.