四轮转向系统（4WS），是指后轮也和前轮相似，具有一定的转向功能，不仅可以与前轮同方向转向，也可以与前轮反方向转向。
为了改善传统四轮转向系统的不足，研究了四轮线控转向系统的横摆角速度反馈控制策略。
To improve the defects of traditional Four-Wheel-Steering system yaw rate feedback control strategy of Four-Wheel-Steer-by-Wire system was researched.
将横摆力矩控制(dyc)与四轮转向(4ws)系统相结合，建立侧偏角和横摆角速度具有最佳输出响应的车辆理想模型。
A desirable vehicle model with the best performance of side slip Angle and yaw rate is established through connecting direct yaw moment control (DYC) with four wheel steering (4ws) system.
本文研究侧偏角有约束条件下，汽车四轮转向控制系统的设计问题。
Four wheels steering control for vehicle with constraints on side slip Angle is studied in this paper.
应用推荐