以自动控制原理和汽车理论课程为理论基础，建立了汽车二自由度系统模型以及电动助力转向系统模型，并进行仿真。利用已经建好的车辆模型和转向系统模型，还可以实现与CarSim等车辆动力学软件实现联合仿真。(Based on the theory of automatic control and automobile theory, a vehicle two degree of freedom system model and an electric power steering system model are established and simulated. Using the built vehicle model and steering system model, it can also realize the joint simulation with CarSim and other vehicle dynamics software.)