商用车循环球式EPS系统建模及仿真分析  

The Analysis and Building on Modeling of Recirculating-ball EPS Systemfor Commercial Vehicle

作　　者：马相飞 张旭 王印 武星 MA Xiangfei;ZHANG Xu;WANG Yin;WU Xing(Shaanxi Automobile Group Co.,Ltd.,Shaanxi Xi'an 710043)

机构地区：[1]陕西汽车集团有限责任公司,陕西西安710043

出　　处：《汽车实用技术》2021年第13期57-59,共3页Automobile Applied Technology

摘　　要：文章通过对商用车用循环球式电动助力转向系统主要模块的数学模型进行推导分析,建立了系统Matlab/Simulink仿真模型。对电动机的电流环采用模糊PID控制策略,提高转向系统的稳定性。根据设计的EPS系统,搭建车辆二自由度仿真模型,仿真结果表明:控制器能有效保持对目标电流的持续跟踪,显著提高汽车转向系统的动态性能。The mathematical model of primary modules of recirculating-ball electric power steering system for bus was built in this paper.The simulation model of the EPS system was constructed based on Matlab/Simulink.Adaptive fuzzy PID is adopted as the control strategy of motor current loop.On basis of EPS,the dual degree model of vehicles is built to analyze yaw angular velocity response under the step input of torque of steering dish.The simulation results demonstrate that the controller follow objective current algorithm is effective in improving the dynamic performances of steering system.

关 键 词：EPS 数学模型 整车模型 控制策略 

分 类 号：U463.4[机械工程—车辆工程]