基于ADAMS与Simulink工程车辆油气悬架非线性建模分析

摘要

There are many non-linear factors in the model of hydro-pneumatic suspension system in engineering vehicles.According to its structure properties and the working principal, the nonlinear mathematical model was set up upon the Ideal-Gas equation and oil small orifice flow equation.On this basis, mathematical model was built by Simulink, and hydro-pneumatic suspension system test bench multi-body dynamics model was built by ADAMS.In order to verify the accuracy of the model, the dynamic characteristics test of hydro-pneumatic suspension struts was conducted.The influence law of the excitation frequency change to the dynamic characteristics of hydro-pneumatic suspension struts was obtained.The accuracy and reliability of the non-linear mathematical model and ADAMS multi-body dynamics model of hydro-pneumatic suspension are verified by analysis with comparison of results from co-simulation and experiments, which provide an important reference for research in characteristics of engineering vehicle dynamics and hydro-pneumatic suspension system.%工程车辆油气悬架建模存在诸多非线性影响因素,根据其结构特点和工作原理,基于气体状态方程和油液孔口出流方程建立其非线性数学模型;并以此为基础搭建Simulink数学模型和ADAMS油气悬架试验台多体动力学模型;为验证模型准确性,搭建油气悬架试验台,进行油气悬架动态特性试验, 获得激励频率变化对油气悬架动态特性的影响规律.对比分析联合仿真和试验结果验证了非线性数学模型和联合仿真模型的准确性与可靠性,为工程车辆油气悬架系统的特性研究及整车动力学特性研究提供了参考.