基于相控阵超声的汽车后桥螺旋锥齿轮畸变控制方法  

Distortion Control Method of Automotive Rear Axle Spiral Bevel Gear Based on Phased Array Ultrasound

作　　者：刘怡然 李威[2] 杜月云[1] LIU Yiran;LI Wei;DU Yueyun(Shangqiu Polytechnic,Shangqiu 476005,China;Shangqiu Institute of Technology,Shangqiu 476000,China)

机构地区：[1]商丘职业技术学院,河南商丘476005 [2]商丘工学院,河南商丘476000

出　　处：《机械与电子》2024年第4期33-38,共6页Machinery & Electronics

摘　　要：由于汽车后桥螺旋锥齿轮畸变控制的过程中易受畸变回波的影响,存在大量的噪声信号,导致控制误差较大、控制精度较低及控制效果较差,为此,提出基于相控阵超声的汽车后桥螺旋锥齿轮畸变控制方法。首先采用相控阵超声技术采集汽车后桥螺旋锥齿轮的振动信号,并将采集后的齿轮振动信号通过异性扩散降噪法进行降噪处理;然后根据降噪处理结果,采用畸变散射算法计算散射波的散射幅值,获取畸变信号的回波特性,采用曲线矩阵回波算法对畸变信号进行定位,得到畸变信号位置点后,提取畸变信号的特征;最后根据多普勒效应,计算畸变信号特征的频偏曲率,采用重采样畸变控制技术根据不同段的频偏基准点重新采样,进行齿轮畸变控制。实验结果表明,所提方法的畸变控制精度高、效果好。Because of the influence of distortion echo in the process of distortion control of automotive rear axle spiral bevel gear,there are a large number of noise signals,resulting in large control error,low control accuracy and poor control effect.Therefore,a distortion control method of automotive rear axle spiral bevel gear based on phased array ultrasound is proposed.Firstly,the vibration signal of spiral bevel gear of rear axle of automobile is collected by phased array ultrasonic technology,and the collected vibration signal of gear is processed by anisotropic diffusion noise reduction method;then,according to the noise reduction processing results,the scattering amplitude of the scattered wave is calculated by the distorted scattering algorithm,and the echo characteristics of the distorted signal are obtained.The distorted signal is located by the curve matrix echo algorithm,and the position points of the distorted signal are obtained,and the characteristics of the distorted signal are extracted;finally,according to the Doppler effect,the frequency offset curvature of the distorted signal characteristics is calculated,and the resampling distortion control technology is used to resample the frequency offset reference points in different segments to control the gear distortion.The experimental results show that the proposed method has high distortion control accuracy and good effect.

关 键 词：异性扩散降噪 曲线定量 重采样 频偏变化曲线 插值算法 

分 类 号：TH132.4[机械工程—机械制造及自动化] U279.3[机械工程—车辆工程]