第一作者陆文昌男，博士，副教授，1957年生

气动可调阻尼同轴一体式减振支柱阻尼特性研究

陆文昌，杨帆，汪少华，孙晓强，陈龙

(江苏大学汽车与交通工程学院，江苏镇江212013)

摘要：为改善减振器自适应能力，提出由空气弹簧、PDC阀及三筒式液压减振器组成的阻尼可调一体式减振支柱设计方案，该减振支柱阻尼特性与空气弹簧压强相关。介绍减振支柱的结构组成及工作原理并建立阻尼特性数学模型，用SIMULINK软件建立该减振支柱阻尼特性仿真模型。仿真结果表明，阻尼力随空气弹簧压强成非线性变化，空载及轻载均利于平顺性提高，重载利于行驶动力性提高，从而实现悬架系统自适应能力提高。通过台架实验测试空气弹簧压强不同时的阻尼特性与仿真结果基本一致，表明该减振支柱数学模型的正确性及结构设计方案的可行性。

关键词：减振支柱；压强相关阻尼特性；数学模型；仿真；台架实验

基金项目：国家自然科学基金(51375212);江苏省高校科学研究项目(12KJB58001)；中国博士后科学基金资助项目(2014M551518)；江苏省“六大人才高峰”资助项目(2013-GDZB-001)；江苏大学高级专业人才科研启动基金(14JDG067)

收稿日期：2014-07-14修改稿收到日期：2014-09-25

中图分类号:U463.33

文献标志码：A

DOI:10.13465/j.cnki.jvs.2015.20.020

Abstract:Aiming at improving the adaptive ability of shick absorbers, a type of suspension strut consisting of an air spring, a PDC-valve and a three-tube hydraulic shock absorber was designed. The damping characteristic of the strut can be controlled by adjusting the pressure of the air spring. The structure and basic working principle of the suspension strut was introduced. A mathematical model for the damping characteristic of the strut was established. And a model for the simulation of the strut was established by using the software SIMULINK. The simulation results show that the damping characteristic of the strut varies nonlinearly with the pressure of the air spring. The ride comfort of the vehicle is improved under empty load and light load conditions, and the dynamic performance of the vehicle is also improved under heavy load conditions. Thus the adaptive ability is up-graded. The damping characteristic of the strut was tested under different pressure of the air spring on a strut test bench. The test results show a good agreement with the simulation ones. It concludes that the mathematical model of the strut is correct and the design scheme of the strut is feasible.

Damping characteristics of a coaxial integrated strut with adjustable pneumatic damping

LUWen-chang,YANGFan,WANGShao-hua,SUNXiao-qiang,CHENLong(School of Automobile and Traffic Engineering, Jiang Su University，Zhenjiang 212013, China)

Key words:strut; pressure-dependent damping characteristic; mathematical model; simulation; bench test

减振器作为悬架系统中主要组成部分在车辆行驶中起重要作用[1-2]，其阻尼性能对车辆行驶动力性及平顺性影响较大[3]。而行驶动力性要求与平顺性要求相互矛盾。普通减振器具有特定的特性曲线并与特定车身重量匹配，阻尼力不可变且能满足大部分行驶状态要求。……