轿车ECAS充放气时平顺性的控制研究  

Study on the Control of Ride Comfort Based on ECAS Car Ramp

作　　者：孙士雷 韩振南[1] SUN Shi-lei;HAN Zhen-nan(Taiyuan University of Technology,College of Mechanical Engineering,Shanxi Taiyuan030024,China)

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《机械设计与制造》2020年第11期49-52,共4页Machinery Design & Manufacture

基　　金：太原理工大学研究生核心课程建设基金项目资助。

摘　　要：为了研究电子控制空气悬架(ECAS)充放气时汽车的平顺性,针对丰田某一款车的电子控制主动式空气悬架,在空气悬架模拟试验台上,根据位移传感器测得在不同时间下空气悬架充放气时的高度以及实验过程中空气悬架结构变化的特点,建立悬架刚度的数学模型;同时,结合减震器阻尼系数与悬架刚度之间的理论关系,建立1/4的主动式空气悬架数学模型。在Matlab/Simulink中,设计一个模糊PID控制器,在D级高斯白噪声路面上对汽车进行ECAS充放气时平顺性的仿真。结果表明:通过对Fuzzy-PID控制前后的数据结果对比可知,采用模糊PID控制策略后,大大改善了空气悬架充放气时汽车的舒适性,为空气悬架进行充放气时的控制策略提供了一种可行的方法。In order to study the smoothness of the car when the electronic control air suspension(ECAS)is filled and vented,an electronically controlled active air suspension for a certain Toyota vehicle,on the air suspension simulation test bench,according to the displacement sensor,the height of the air suspension when it is filled and released at different times and the characteristics of the air suspension structure change during the experiment are measured,the mathematical model of suspension stiffness is established.At the same time,the theoretical relationship between the damping coefficient of the shock absorber and the suspension stiffness is discussed,the mathematical model of 1/4 active air suspension was established.In Matlab/Simulink,a fuzzy PID controller was designed,to simulate the smoothness of ECAS on the D-level Gaussian white noise road surface.The results show that the comparison of the data before and after the Fuzzy-PID control shows that adopt the fuzzy PID control strategy after,the smoothness of the car is greatly improved when the air suspension is charged and vented,it provides a feasible method for the control strategy of the air suspension when air isfilled and released.

关 键 词：电子控制 主动式空气悬架 减震器阻尼系数 充放气 

分 类 号：TH16[机械工程—机械制造及自动化] U463.33[机械工程—车辆工程]