基于MATLAB的汽车独立悬架模型与仿真研究

Research on Vehicle Independent Suspension Model and Simulation Based on MATLAB

为建立用于汽车悬架仿真研究的路面模型,及由路面振动产生的底盘滚动和反弹,同时调整悬架参数进行性能优化设计,进行了基于MATLAB的汽车悬架多体动力学仿真研究。以四分之一车桥为模型,建立其物理模型图示,给出了悬架系统的动力学数学模型。基于Simulink多体动力学仿真环境,搭建了用于悬架仿真研究的路面模型,模型通过PD控制器实现高精度闭环控制。建立双横臂式悬架模型,并与路面模型相连接,实现了悬架路面模拟仿真。仿真结果得到了悬架系统底盘的滚动和反弹变化,为汽车独立悬架仿真研究与优化设计提供了参考。

In order to establish the road model for the simulation of automobile suspension and the chassis rolling and rebound caused by road vibration,and adjust the suspension parameters for performance optimization design,the multi-body dynamics simulation of automobile suspension based on MATLAB is carried out.Taking the quarter axle as the model,the physical model diagram is established,and the dynamic mathematical model of the suspension system is given.Based on Simulink multi-body dynamics simulation environment,a road model for suspension simulation is built.The model realizes high-precision closed-loop control through PD controller.The double wishbone suspension model is established and connected with the road model to realize the suspension road simulation.The simulation results obtain the rolling and rebound changes of the chassis of the suspension system,which provides a reference for the simulation research and optimization design of automobile independent suspension.