油气悬挂非线性数学模型及性能特性的研究

Research on nonlinear mathematical model and performance in hydro-pneumatic suspension

以工程车辆的减振性能为研究目的 ,以 CXP1 0 32起重机油气悬挂为研究对象 ,采用理论和试验相结合的方法 ,介绍了油气悬挂的结构和工作原理 ,根据其单缸物理模型建立复杂的非线性数学模型 ,确定了一组参数值 ,用德国 SCHENCK公司生产的全路面模拟试验台分别对单缸及整车进行试验 ,用 MATLAB5 .3/SIMULINK3.0软件进行计算机仿真 ,试验结果与计算机仿真结果基本吻合 ,表明所建立的数学模型适用于被研究的油气悬挂 ,以此为依据分析油气悬挂的非线性刚度特性、阻尼特性及减振性能等性能特性 ,为油气悬挂的国产化提供可靠的理论和实践依据。

Taking shock absorbing performance of construction vehicle as researching purpose,taking hydro pneumatic suspension of CXP1032 crane as researching object,with the methods of theory and experiment,the structure and working theory of hydro pneumatic suspension are introduced. According to the physical model of single cylinder,a complex nonlinear mathematical model for it is developed and a set of parameter values are defined. With the full road experimental equipment produced by Company SCHENCK of Germany,the test has been done. With the language of MATLAB5.3,computer simulation has been used.The comparison between the simulative results and experimental results has proved that the developed model can fit to the researched hydro pneumatic suspension.So some performances are analyzed such as nonlinear stiffness and damping characteristics,shock absorbing characteristics and so on.This is beneficial for providing believable theory and experimental data in producing hydro pneumatic suspension for our country.