电动助力转向系助力控制方法的研究*

作者：张国耕，王耘，胡树根，卢斌 日期：2008-06-23/span> 浏览：3961 查看PDF文档

电动助力转向系助力控制方法的研究*

张国耕，王耘，胡树根，卢斌
（浙江大学 机械与能源工程学院，浙江 杭州 310027）

摘要：推导了采用比例－微分（PD）控制下电动助力转向系（EPS）的动力学模型，并通过简化得到了其2阶模型。在此基础之上，分析了PD控制参数对于EPS转向系的影响，并提出了“车速感应型微分系数”的PD助力控制策略。仿真结果表明，该助力控制方式充分利用了EPS控制可调节的特点，使系统在快速性和稳定性上达到了平衡，优于现有的“固定微分系数”的PD助力控制方式。
关键词：电动助力转向系；比例-微分控制；仿真；车速感应型微分系数
中图分类号：U463.4文献标识码：A文章编号：1001-4551(2008)06-0008-03

Research on control strategy of electric power steering system
ZHANG Guogen, WANG Yun, HU Shugen, LU Bin
(College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: A dynamic model of electric power steering under proportion differential control manner was set up and a 2order model was deduced. Based on the model, an analysis was carried out to get the influence under different control parameters, and “changeable differential gain according to the vehicle velocity” control manner was put forward. The simulation results show that, the control manner takes good advantage of the EPS feature to improve the EPS performance, and it is better than the unchangeable differential gain control manner.
Key words: electric power steering (EPS); proportion differential (PD) control; simulation; changeable differential gain according to the vehicle velocity