主动前轮转向变传动比曲线分析与设计  

Analysis and Design of the Variable Steering Ratio Curve of Active Front Steering System

作　　者：周兵[1] 范璐[1] 骆晨[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]西南交通大学交通运输与物流学院,四川成都610031

出　　处：《湖南大学学报（自然科学版）》2014年第2期73-78,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51275162)

摘　　要：传统主动前轮转向系统理想变传动比曲线非光滑,会导致电机转矩波动等问题.本文基于车辆模型,通过对比分析5种拟合变传动比曲线的性质,设计光滑的拟合变传动比曲线.分析表明,改进型S函数变传动比曲线与理想变传动比曲线非常接近,并且其使电机角加速度突变最小,从而能使电机转矩的突变最小,具有最优综合性能.在MATLAB/Simulink中仿真结果验证了改进型S函数变传动比曲线的优良性能.In traditional Active Front Steering System, the ideal variable steering ratio curve has the defect of non-smooth property, thus inducing torque fluctuation of the electric motor. This paper aims at designing a smooth fitting variable steering ratio curve based on vehicle model, through a comparative anal-ysis of five different kinds of fitting variable steering ratio curves. The analysis indicates that the modified sigmoid fitting curve has the best overall performance due to its closeness to the ideal curve and mininal in-fluence on the torque fluctuation of the electric motor. Furthermore, simulation in MATLAB/Simulink validates the good property of the modified sigmoid fitting curve.

关 键 词：主动转向 变传动比曲线 最小二乘法 仿真 

分 类 号：U463.4[机械工程—车辆工程]