轮毂电机电动汽车EPS系统控制策略研究  

Research on EPS system control strategy of in-wheel motor electric vehicle

作　　者：郭君 王杰[1] 常依乐 高兆桥 王戈 GUO Jun;WANG Jie;CHANG Yile;GAO Zhaoqiao;WANG Ge(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255000,Shandong,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东省淄博市255000

出　　处：《农业装备与车辆工程》2023年第8期83-87,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：为降低轮毂电机电动汽车非簧载质量增加对整车操纵稳定性的影响,以某轮毂电机电动汽车电动助力转向系统(Electric Power Steering,EPS)为研究对象,对其参数匹配和控制策略进行研究。设计了目标车型的直线型助力特性曲线,在助力控制的基础上加入阻尼、回正控制,采用PID控制算法对助力电流进行调节。基于ADAMS/Car搭建轮毂电机电动汽车整车动力学模型,通过MATLAB/Simulink搭建EPS控制模型,实现联合仿真。对操纵稳定性进行了转向盘角阶跃和转向盘角脉冲仿真试验,加入EPS控制后,整车横摆角速度、侧向加速度、质心侧偏角值均有所降低。结果表明:研究的EPS控制策略提高了轮毂电机电动汽车的操纵稳定性,具有较好的控制效果。Aiming at the influence of the increase of unsprung mass of in-wheel motor electric vehicle on the handling stability of the whole vehicle,the electric power steering system(Electric Power Steering,EPS)of an in-wheel motor electric vehicle was taken as the research object to research on its parameter matching and control strategy.The linear power-assist characteristic curve of the target model was designed,and damping and return control were added on the basis of power-assist control,and the power-assist current was regulated based on PID control algorithm.The whole vehicle dynamics model of in-wheel motor electric vehicle was built based on ADAMS/Car,and the EPS control model was built based on MATLAB/Simulink to realize the joint simulation.The steering wheel angle step and steering wheel angle pulse simulation tests were conducted for the handling stability,after adding EPS control,the whole vehicle yaw velocity,lateral acceleration,and sideslip angle of the center of mass were reduced.The results showed that the EPS control strategy studied improved the steering stability of the hub motor electric vehicle with good control effect.

关 键 词：轮毂电机 电动汽车 助力转向 联合仿真 控制策略 操纵稳定性 

分 类 号：U463.4[机械工程—车辆工程] U469.72[交通运输工程—载运工具运用工程]