基于经验模态分解的载货汽车载荷动态检测策略研究  

Dynamic detection strategy of vehicle load based on EMD

作　　者：田晶晶[1] 李世武[1] 苏建[1] 杨志发[1] 陈璐[1] 汪海正[1] 

机构地区：[1]吉林大学交通学院,长春130022

出　　处：《振动与冲击》2013年第4期173-178,共6页Journal of Vibration and Shock

基　　金：国家"863"高技术发展计划项目(2009AA11Z215)

摘　　要：针对载货汽车载荷动态检测问题,仿真分析了汽车不同车速和载荷状态下悬架的动态特性。基于车辆载荷与悬架变量的关系,设计了一种高精度带过载保护的汽车载荷动态检测装置,采用经验模态分解法(Emprical ModeDecomposition,EMD)构建了汽车载荷动态检测装置数据处理算法。以解放赛龙Ⅱ载货汽车为试验车、MC9S12XEP100单片机为车载终端构建了车辆载荷动态检测试验平台,并对系统进行了静态标定和动态检测试验。试验结果表明:该装置在试验车车速为40和60 km/h、装载量分别为空载、半载和满载状态下对车辆总重检测结果误差均小于5.0%;车速为90km/h、相同装载量状态下,检测结果误差分别为3.12%,7.616%和6.75%;由此可见,随着试验车速增大,该装置对车辆载荷动态检测精度波动范围增大,但是总体满足工程的实际需求,它为车辆载荷动态实时检测提供了一种新方法。For dynamic detection of vehicle load, the dynamic performance of a vehicle suspension under different operating conditions was simulated using Matlab/Simulink. Based on the relationship of vehicle load and deformation of suspension, a high accuracy detection device with an overload protection function was developed based on displacement sensors and a data processing algorithm for the output signals of displacement sensors was built with emprical mode decomposition （EMD）. The testing platform was established with a Jie-Fang Sailong heavy truck and MC9S12XEP10 microcontrollers. The static calibration and dynamic test with different loads at different speeds were conducted to analyze the system accuracy. The test results showed that this system can accurately measure the load of a test vehicle under noloading, half of the full loading and the full loading at different speeds of 40 and 60 km/h and the measurement errors are less than 5.0% ; the measurement errors are respectively 3.12% , 7. 616% and 6.75% for the same loadings at speed of 90 km/h; so the fluctuation of the measurement errors increases wtih increase in speed. This method provided a new technology for dynamic detection of overload.

关 键 词：车辆工程 载货汽车 经验模态法 载荷 动态检测 

分 类 号：U462.1[机械工程—车辆工程]