基于动力学分析的汽车减震器示功图故障检测算法  

Fault detection algorithm for indicator diagram of automobile shock absorber based on dynamic analysis

作　　者：关亮亮 田国红[1] GUAN Liang-liang;TIAN Guo-hong(Department of Automobile and Traffic Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121001

出　　处：《吉林大学学报（工学版）》2024年第5期1221-1226,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金面上项目(51675257)。

摘　　要：为解决汽车减震器因流动惯量导致径向动力发生偏差的问题,提出基于动力学分析的汽车减震器示功图故障检测算法。计算减震液在左、右2个封闭区域的流动惯量,将压缩行程中的径向动力和回弹行程中的径向动力代入能量与动量方程中,建立汽车减震器动力学方程,再绘制实测示功图,并将其作为样本输入支持向量机中进行分类,再设定判定阈值进行阈值判定,完成示功图故障检测。试验结果表明:本文方法在供液不足、双凡尔漏失、活塞被卡、砂阻时获取的汽车减震器示功图与实测示功图基本吻合,说明本文方法的故障检测准确性高。To alleviate the radial power deviation caused by flow inertia in automotive shock absorbers, a fault detection algorithm based on dynamic analysis of automotive shock absorber indicator diagram is proposed. Calculate the flow inertia of the shock absorber fluid in the left and right enclosed areas, substitute the radial force in the compression stroke and the radial force in the rebound stroke into the energy and momentum equations, establish the dynamic equation of the car shock absorber, draw the measured indicator diagram, and input it as a sample into the support vector machine for classification. Set the judgment threshold for threshold judgment, and complete the fault detection of the indicator diagram.The experimental results show that the proposed method′s fault detection accuracy is good, as the indicator diagram of the automotive shock absorber obtained during insufficient liquid supply, double valve leakage, piston jamming, and sand resistance is basically consistent with the measured indicator diagram.

关 键 词：动力学分析 汽车减震器 连杆 示功图 支持向量机 

分 类 号：TH165[机械工程—机械制造及自动化]