摘要 线控转向系统通过借助线缆操纵电机从而完成转向，提高了驾驶舒适性以及紧急情况下的驾驶安全性。由于采用电控，线控转向系统更容易与其他线控系统集成，是实现自动驾驶汽车的重要基础。 本文主要内容有：对线控转向系统的基本组成结构与工作原理进行了简要地介绍；对转向系统转向执行电机、离合器的选型，蜗轮蜗杆减速机构、齿轮齿条转向机构等的设计；使用CATIA绘制了转向系统各零部件的三维图以及部分二维图并进行了运动学仿真；使用MATLAB/Simuli
nk和CarSim联合建模对转向系统进行了动力学仿真；借助A
nsys Workbe
nch对转向器的齿轮轴进行了静力学仿真分析。 关键词：线控转向；结构设计；仿真分析 Abstract The steeri
ng by wire system co
ntrols the motor by mea
ns of cable to complete steeri
ng, which improves drivi
ng comfort a
nd drivi
ng safety i
n emerge
ncy. Because of the use of electro
nic co
ntrol, steer by wire system is easier to i
ntegrate with other wire co
ntrol systems, which is a
n importa
nt fou
ndatio
n for realizi
ng automatic drivi
ng vehicle. The major co
nte
nts of this paper are as follows: the eleme
ntary structure a
nd worki
ng pri
nciple of the steer by wire system are briefly i
ntroduced; the desig
n a
nd selectio
n of the steeri
ng executive motor, clutch, worm a
nd worm reducer, gear rack steeri
ng mecha
nism, etc. of the steeri
ng system are i
ntroduced; the three-dime
nsio
nal drawi
ngs a
nd some two-dime
nsio
nal part drawi
ngs of the steeri
ng system are draw
n with CATIA a
nd the ki
nematic simulatio
n is carried out; the dy
namic simulatio
n of the steeri
ng system is carried out by the model combi
ned MATLAB/Simuli
nk a
nd CarSim, a
nd the static simulatio
n a
nalysis of gear shaft of steeri
ng gear is carried out by usi
ng the ANSYS Workbe
nch. Key Words：Steer-by-wire；structure desig
n；simulatio
n a
nalysis 目录 第1章绪论1 1.1转向系统发展概述1 1.1.1机械转向系统1 1.1.2液压助力转向系统1 1.1.3电液助力转向系统1 1.1.4电动助力转向系统2 1.1.5线控转向系统2 1.2线控转向系统国内外研究发展概述2 1.2.1国外概述2 1.2.2国内概述3 1.3研究背景与意义3 1.4任务车型参数3 1.5主要内容3 第2章线控转向系统组成结构与工作原理5 2.1组成结构与工作原理5 2.2典型布置5 2.3关键技术6 2.3.1传感器技术6 2.3.2总线技术6 2.3.3电源技术6 2.3.4容错6 2.4常见转向器类型7 2.4.1齿轮齿条式转向器7 2.4.2循环球式转向器7 2.4.3蜗杆滚轮式转向器7 2.4.4蜗杆指销式转向器8 第3章转向系统设计计算9 3.1主要参数确定9 3.2电机型号确定9 3.2.1转向执行电机的类型9 3.1.2电机参数确定9 3.3离合器型号确定10 3.4蜗轮蜗杆减速机构设计10 3.4.1蜗杆传动的特点10 3.4.2蜗杆参数计算11 3.5齿轮齿条转向机构设计13 3.5.1齿轮传动的特点13 3.5.2齿轮齿条式转向机构的线角传动比14 3.5.3齿轮齿条参数计算15 3.6齿轮齿条间隙装置设计17 第4章仿真分析19 4.1运动学仿真20 4.2动力学仿真21 4.2.1转向系统微分方程建立21 4.2.2仿真模型搭建21 4.3 CAE分析25 第5章总结与展望29 5.1总结29 5.2展望29 参考文献30 致谢32