基于模糊PID控制器的电动汽车放电控制研究

Research on electric vehicle discharge control based on fuzzy PID controller

新能源汽车的调速稳定控制性能、续航里程以及蓄电池寿命的提高对电动汽车发展有着重要的影响。为了分析不同的放电控制策略对电动汽车的调速、蓄电池输出电压及容量产生的影响,运用Matlab/Simulink软件搭建蓄电池放电模型,通过模拟电动汽车起动、调速及负荷变化分别对应电机恒速起动、运行过程中转速突变、突加负载三种情况,采用传统比例-积分-微分控制器(PID)和模糊PID两种控制策略对蓄电池放电进行仿真分析。结果表明,模糊PID控制器对电机转速、调速响应速度、电压输出等的控制效果及精度优于传统PID控制器,验证了所提模糊PID矢量控制的合理性及稳定性。

How to improve the speed and stability control,cruising range,and battery life of new energy vehicles has an important impact on the development of electric vehicles.In order to analyze the impact of different discharge control strategies on the speed regulation,battery output voltage and capacity of electric vehicles,this paper uses Matlab/Simulink software to build a battery discharge model.By simulating the electric vehicle starting,speed regulation and load changes,it corresponds to the constant speed of the motor.During the starting and running process,there are three cases of sudden changes in speed and sudden load increase.The traditional PID and fuzzy PID control strategies are used to simulate and analyze the battery discharge control.The simulation results show that the fuzzy PID controller has better control effect and accuracy on the motor speed,speed response speed and voltage output than the traditional PID controller,which verifies the rationality and stability of the proposed fuzzy PID vector control.