中文摘要：

为了提高纯电动四轮驱动汽车的整车动力性和行驶稳定性,提出一种通过对汽车前后轴转速差及车轮滑转率实时观测完成轴间扭矩重新分配的控制策略。通过Matlab/Simulink构建了整车动力学模型,并设计了基于遗传算法（GA）和PID控制的轴间扭矩分配控制系统,分别在低附着均一路面、对接路面对整车加速性能进行了仿真分析。对该轴间扭矩控制系统进行软硬件设计,并对开发的控制器进行了道路试验。结果显示运用该控制器及控制策略能较好地跟随实时路况,使车辆动力性和行驶稳定性得到提升,试验结果也验证了控制系统的有效性。

英文摘要：

In order to improve the four-wheel drive vehicle dynamic performance and running stability,an axis torque distribution control strategy was proposed through real-time observation of front and rear shaft speed difference and wheel slip ratio of the car. The vehicle dynamics model was constructed through the Matlab/Simulink,including transmission system model,tire model and sub-modules like slip ratio calculation module and motor model. The inter axle torque distribution control system and application was designed based on genetic algorithm（ GA） and the PID control. On the low adhesion uniform pavement,docking road face to speed up performance of vehicle was simulated and analyzed.The hardware and software design of the shaft torque control system was carried out,and the development of the shaft torque control system was done,and the development of the controller was verified by the road test. The hardware and software design included the controller circuit and power circuit,and the control system of PCB harware increased the anti-interence design. Taking Code Warrior as platform,the control system software framework,CAN bus communication program,data acquisition program,PWM driver were designed. The result showed that the controller and the control strategy can follow the real-time road conditions well,so that the vehicle dynamic performance and stability were improved. The test result also verified the effectiveness of the control system.