负载变化对纯电动货车驱动控制策略的影响

Influence of Load Variation on Pure Electric Truck Drive Control Strategy

针对常规驱动控制策略无法应对纯电动货车负载变化较大的问题,以电机输出的扭矩为控制对象,提出一种基于模糊控制的驱动控制策略:该控制策略的模糊控制器以加速踏板开度和加速踏板开度变化率为输入,以电机输出扭矩的补偿系数为输出;通过电机的扭矩负荷系数和转速制定驱动的基准扭矩;利用实车数据和仿真数据进行对比,验证了AVL CRUISE中整车模型的可靠性和有效性;考虑货车不同负载对扭矩增量的影响,使用MATLAB和Cruise平台进行不同负载情况下驱动控制策略的仿真验证;结果表明:CRUISE中搭建的整车模型具有一定的可靠性和有效性;提出的控制策略在不同的负载情况下对加速踏板信号产生不同的响应,对电机输出扭矩起到补偿效果;在NEDC行驶工况中该控制策略在保证整车动力性的同时,也降低了电机输出的能量。

Aiming at the problem that the conventional driving control strategy could not cope with the large load variation of pure electric truck,the torque of the motor is taken as the control object,a driving control strategy based on fuzzy control was proposed:The fuzzy controller of the control strategy takes the accelerator pedal opening and the change rate of accelerator pedal opening as input,and the compensation coefficient of motor output torque as output. Through the torque load factor and speed of motor to set the reference torque;The reliability and validity of the vehicle model in AVL CRUISE are verified by comparing the real vehicle data with the simulation data;Considering the influence of different loads on the torque increment of the truck,the simulation verification of the drive control strategy under different load conditions is carried out using MATLAB and Cruise platform;The result shows:The vehicle model built in CRUISE has certain reliability and effectiveness;the proposed control strategy produces different responses to the accelerator pedal signal under different load conditions,and compensates the motor output torque;The control strategy reduces the power output of the motor while ensuring the power of the vehicle in the NEDC driving condition.