汽车主动转向附加前轮转角控制的研究

Study on Active Steering with Front Steering Angle Control of Automobiles

随着汽车电子技术的发展,主动前轮转向系统作为一项新技术越来越受到人们的关注。提出了一种前轮转角反馈控制方法,首先,建立了汽车动力学模型和AFS模型,然后设计主动前轮转向附近前轮转角控制框图,利用Matlab/Simulink软件进行前轮转向角和附加前轮转角的仿真,从而实现附加前轮转角控制。结果表明:低速时,改善了车辆的转向灵活性;高速时,通过附加的前轮转角控制,能提高车辆转向的操作稳定性。

With the development of electronic technology, active front steering system is receiving more and more attention because of new technology. A feedback control method is proposed to control superposition angle. Firstly, a mathematics model AFS based on epieyclic train and vehicle dynamic model were built. Model of superimposition deflection angle control was designed. A simulation is performed by input of front steering angle and superimposition deflection angle by Matlab/Simulink. Results showed it is more easy and more flexible when the vehicles travel at low speed and it enhances the handling stability through attaching a front wheel angle when the vehicles travels at high speed.