商用车液压助力转向系统建模及整车转向操纵性能仿真  

Modeling for the Hydraulic Power Steering System of Commercial Vehicles and Handling Performance Simulation for the Whole Vehicle

作　　者：江浩斌[1] 史益朋[1] 耿国庆[1] 董家寅[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《机床与液压》2013年第3期102-105,共4页Machine Tool & Hydraulics

基　　金：江苏省属高校自然科学研究重大项目(11KJA580001);江苏省道路载运工具新技术应用重点实验室开放课题(BM2008206003)

摘　　要：为了分析商用车液压助力转向系统(HPS)主要参数对整车转向操纵性能的影响,建立了HPS机械子系统、液压子系统和整车三自由度转向动力学模型,基于MATLAB/Simulink建立HPS系统及整车转向操纵性仿真模型。以装有GY80型液压助力转向器的商用车为例,仿真分析HPS系统供油量和扭杆刚度对方向盘阶跃输入工况的整车横摆角速度、侧向加速度、车身侧倾角和侧倾角速度的影响。结果表明:考虑车身侧倾角稳态值以及响应速率等因素,适度增大HPS系统供油量和扭杆刚度可以改善转向灵敏性,若过度增大供油量和扭杆刚度,则转向行驶稳定性及乘坐舒适性变差。Models of HPS mechanical subsystem, hydraulic subsystem and the 3 - DOF whole vehicle were established, in order to analyze the influence of main parameters of the commercial vehicle HPS on the steering handling performance. Taking the commer- cial vehicle equipped with GYS0 ECHPS as example, the effects of oil supply of HPS and the torsion stiffness on the whole vehicle yaw velocity, lateral acceleration, body roll angle and roll angular velocity caused by the steering wheel step input were analyzed based on MATLAB/Simulink. The simulation results indicate that steering sensitivity can be improved by taking the steady state value of body roll angle and response rate into account and increasing the oil supply of HPS and torsion stiffness properly. But when the oil supply of HPS and torsion stiffness are increased excessively, both the steering stability and ride comfort are degraded.

关 键 词：商用车 液压助力转向系统 供油量 扭杆刚度 操纵性能 

分 类 号：U463.4[机械工程—车辆工程]