电动助力转向系统的仿真分析与研究-车辆工程专业论文.docxVIP

重庆理工大学硕士学位论文 重庆理工大学硕士学位论文 电动助 电动助力转向系统的仿真分析与研究 万方数据 万方数据 万方数据 万方数据 II Abstract Electric power steering system (EPS) is based on the traditional mechanical steering system , According to the torque signals and speed signals which effect on the steering wheel, through the electronic control device in order that the motor can produce corresponding size and direction of auxiliary torque, help the driver to do turn operation and get the best characteristics of the servo steering system. Compared with the Ordinary hydraulic power steering system, it has a distinct advantage in energy saving, environmental protection, compact structure, as well as road feel.. EPS will become standard in modern cars with the technological advances and cost reductions. This article first set up corresponding vehicle dynamics model in accordance with the road feel and steering sensitivity. Systematically analyze the various parameters which impact on the road sense and steering sensitivity by the simulation system . provide a theoretical foundation for the design of EPS. Recently, the study of EPS at home and abroad is all aimed at the control strategies, but there is no mention the access method of Power characteristic curve. This article has a detailed expiation in theory why it is difficult to obtain Power characteristic curve scientifically Ultimately, it is difficult to obtain scientific and reasonable is result from that it is not accurate to obtain the size of steering torque which changes with the speed. It is also the underlying causes why it is difficult to design the best power characteristic curves. Therefore, all power curve in this article are measure from the prototype vehicle. this article help to establish the simulation model for the Power characteristic curve in order to evaluate the quality of measurement characteristic curve. calculated power steering control which under the different speed of driver by simulation, and hence on a preliminary evaluation of the power charac