基于MATLAB/Simulink的油气悬架非线性阻尼特性分析  

Simulation of nonlinear damping characteristics of hydro-pneumatic suspension based on MATLAB/Simulink

作　　者：吕宝占[1] 刘志怀[2] 朱思洪[3] 

机构地区：[1]河南理工大学机械与动力工程学院,焦作454000 [2]河南理工大学现代教育技术中心,焦作454000 [3]南京农业大学工学院,南京210031

出　　处：《现代制造工程》2017年第2期61-65,共5页Modern Manufacturing Engineering

基　　金：河南省教育厅自然科学研究计划项目(2010B210009)

摘　　要：结合国产某型半车架拖拉机的振动特性,设计了一种阻尼可调式前轴油气悬架。在分析其工作原理的基础上,建立了油气悬架数学模型,利用MATLAB/Simulink研究和分析了油气悬架的非线性阻尼特性。研究结果表明:油气悬架的阻尼具有明显的非线性特性;活塞阻尼孔的个数和尺寸变化改变油气悬架阻尼的示功图和速度特性曲线;可调节流阀的过流面积只改变油气悬架还原行程的阻尼特性,对压缩行程的阻尼影响不明显;外界激励的频率和幅值对阻尼的示功图有显著影响,但不改变阻尼的速度特性曲线。According to vibration characteristics of a certain type of tractor, a kind of adjustable damping hydro-pneumatic suspen- sion was put forward. Based on the analysis of working principle, the nonlinear mathematical model of suspension was set up, and the nonlinear damping characteristics were investigated using MATLAB/Simulink. The results showed that suspension damping has obvious non-linear characteristics. The indicator diagram and speed characteristics of suspension damping are greatly influ- enced by the fluctuation of the number and size of the damping hole. The flow area of variable throttle only changes the damping characteristics of return stroke, the effect on compression stroke is not obvious. The frequency and amplitude of external excitation have a marked impact on indicator diagram of suspension damping, but have no effect on the velocity characteristics.

关 键 词：车辆工程 油气悬架 非线性特性 示功图 阻尼特性 仿真 

分 类 号：U463.33[机械工程—车辆工程]