基于轮胎非线性特性的四轮转向车辆研究  

Research on Four-Wheel Steering Vehicle Based on Tire Nonlinear Characteristic

作　　者：魏彬 魏春雨 WEI Bin;WEI Chun-Yu(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China)

机构地区：[1]沈阳建筑大学机械工程学院,辽宁沈阳110168

出　　处：《机电产品开发与创新》2023年第2期24-29,共6页Development & Innovation of Machinery & Electrical Products

摘　　要：为了提升汽车在中、高速行驶时的操纵灵活性和安全性能,建立四轮转向汽车横向动力学模型和矩阵方程,考虑轮胎侧偏角不同时侧偏刚度不同,用变权重系数将轮胎变侧偏刚度下汽车矩阵方程关联起来,以质心侧偏角和横摆角速度为优化目标,设计了考虑轮胎侧偏刚度的基于横摆角速度反馈的前后轮主动转向的四轮转向系统;通过MATLAB/Simulink对传统前轮转向、前后轮转角比例控制、变权重系数前后轮主动转向进行仿真试验。结果表明变权重系数前后轮主动转向能够很好的改善汽车质心侧偏角和横摆角速度,高速控制效果更佳。In order to improve the handling flexibility and safety performance of the vehicle at medium and high speed,the lateral dynamics model and matrix equation of the four-wheel steering vehicle are established,considering that the cornering stiffness will change when the tire cornering angle is too large,the equation of matrix of the vehicle with variable cornering stiffness of tires is related by using variable weight coefficients,a Four-Wheel Steering(4WS)system with active front and rear-wheel steering based on yaw rate velocity feedback,taking into account the cornering stiffness of tires,was designed with side slip angle and yaw rate as optimization objectives;Simulations of conventional front-wheel steering,four-wheel steering(4WS)with proportional control,active steering of front and rear wheels with variable weight coefficient were performed using Matlab/Simulink.The results show that the active steering of front and rear wheels with variable weight coefficient can improve yaw rate and side slip angle,with better high-speed control performance.

关 键 词：四轮转向 变权重系数 变侧偏刚度 横摆角速度反馈 前后轮主动转向 

分 类 号：U461.6[机械工程—车辆工程]