电动汽车多自由度整车建模与仿真分析

Modeling and Simulation Analysis of Multi-DOF Electric Vehicle

多自由整车动力学模型是开发电动汽车虚拟样机的核心技术。为研究不同自由度整车动力学模型的适用工况,文章根据经典的汽车动力学思想,利用Matlab/Simulink分别建立了整车动力学模型DOF_2、DOF_7和DOF_10,并进行了单移线工况的仿真实验。实验结果表明,2自由度和7自由度整车模型可适用于模拟低速转弯的行驶工况,10自由度整车模型可适用于模拟低速转弯和高速转弯等多种工况。综上,文章所建模型可为不同工况下整车控制和自适应巡航等项目提供研发平台。

The multi-freedom vehicle dynamics model is the core technology for developing virtual prototypes of electric vehicles.In order to study the applicable working conditions of the vehicle dynamics models with different degrees of freedom,this paper established the vehicle dynamics models DOF_2,DOF_7 and DOF_10 respectively based on the classic car dynamics thoughts,and performs the single-shift line working condition Simulation experiment by Matlab/Simulink.As the simulation results show,the DOF_2 and DOF_7 vehicle models can be used to simulate the driving conditions of low-speed turning,and the DOF_10 vehicle model can be used to simulate various operating conditions such as low-speed turning and high-speed turning.Therefore,the models built in this paper can provide technical support for the research and development of vehicle control and Adaptive Cruise Control under various working conditions.