期刊论文

Differential power steering control for in-wheel motored electric vehicle based on variable universe fuzzy PID

中文

汽车安全与节能学报

1674-8484

2019

10

2

169-177

10.3969/j.issn.1674-8484.2019.02.004

汽车安全与节能国家重点实验室开放基金(KF1827) 国家自然科学基金(51675057).

本校为第一机构

为改善轮毂驱动电动汽车的转向轻便性,提出了一种基于变论域模糊比例-积分-微分(PID)的差动助力转向控制方法。建立转向系统模型和理想助力特性模型,获得车辆转向行驶过程中的理想方向盘力矩;根据方向盘力矩偏差和偏差变化率的大小,调整PID的3个控制参数,实现4个车轮的转矩分配控制;利用PID对车轮的滑移率进行控制,以避免车轮过度滑转;基于CarSim和MATLAB/Simulink软件的数字仿真进行了控制性能分析。结果表明:变论域模糊PID控制下车辆转向轻便性改善43.5%,横摆角速度误差均方根值为0.212 rad/s;该方法能提高方向盘力矩跟踪理想力矩的精度,且有效地实现了车轮滑移率控制。

A differential power steering control method was proposed based on variable universe fuzzy proportional-integral-derivative (PID) to improve the steering lightness of an in-wheel-motored electric vehicle. A steering system model and an ideal power assist characteristic model were established to obtain the ideal steering wheel torque during vehicle steering. According to the deviation of steering wheel torque and the change rate of the deviation, the PID control parameters were adjusted and the torque distribution control of the four wheels were...