基于闭环控制的EPS系统路感分析  

Analysis of EPS(Electric Power Steering)system steering street sense based on the human-vehicle-street loop control

作　　者：陈雄[1] CHEN Xiong(China Automotive Engineering Research Institute Co.,Ltd,chongqing 40122,China)

机构地区：[1]中国汽车工程研究院股份有限公司,重庆401122

出　　处：《自动化与仪器仪表》2021年第9期105-108,共4页Automation & Instrumentation

摘　　要：为使汽车在各个行驶车速下都有良好的转向稳定性,则驾驶员必须有良好的"路感"。在电动助力转向系统中,通过对转向系统中电机电流及转矩传感器输出端电路的控制来获得较为理想的转向助力特性,进而增强驾驶员的"路感"。为此,进行"人—车—路"闭环路感分析。首先,根据主流系统结构建立电动助力转向模型;而后,在满足系统实际性能需求的基础上,将电流控制部分设计成PD控制模块并用MATLAB进行仿真分析,并在整个闭环系统中串联一超前校正系统以进一步优化电动助力系统,提升行驶转向稳定性。To make vehicles in all the speed to have good steering stability,the driver must have good"street sense".In the electric power steering system,we can control the electric current of the steering motor and the circuit of the torque sensor output terminal to get more ideal dynamical assistance characteristics.In this way,drivers can acquire the good street sense.Therefore,"person-car-road"closed-loop system are analyzed in this thesis.We establish electric power steering model firstly.Then,according to the system performance requirements,the current control section is designed into PD(Proportion Differentiation)controlling blocks and we use MATLAB simulation to analyse the system.Then we could optimize the electric power system through adding a pre-correction system in the whole closed loop system to improve the steering stability.

关 键 词：行驶 转向稳定性 路感 PD控制 超前校正 仿真分析 

分 类 号：TP202[自动化与计算机技术—检测技术与自动化装置]