The invention discloses an active front wheel steering control system based on steer-by-wire. A simulation phase plane acquisition module of the active front wheel steering control system acquires a vehicle side slip angle and a side slip angle speed simulation phase plane; the simulation phase plane division module divides a phase plane into a stable region converging towards a balance point and a non-stable region diverging away from the balance point; the tire cornering stiffness obtaining module obtains tire cornering stiffness information; the real-time phase plane acquisition module acquires a real-time phase plane; the vehicle driving state determination module determines the current driving state of the vehicle in the phase plane; the vehicle linear two-degree-of-freedom model construction module constructs a vehicle two-degree-of-freedom kinetic equation; and the steering strategy acquisition module tracks the ideal yaw velocity and outputs a corresponding front wheel steering angle control strategy. According to the sliding-mode control method, the sliding-mode control algorithm for optimizing the approaching rate parameter through the particle swarm optimization algorithm is adopted, tracking optimization is conducted on the yaw velocity, and the vehicle is more comfortable and more stable in control.
本发明公开了基于线控转向的主动前轮转向控制系统,它的仿真相平面获取模块获取车辆质心侧偏角与质心侧偏角速度仿真相平面;仿真相平面划分模块将相平面划分为向平衡点收敛的稳定区域和远离平衡点发散的非稳定区域;轮胎侧偏刚度获取模块得到轮胎侧偏刚度信息;实时相平面获取模块获取实时相平面;车辆行驶状态确定模块在相平面中确认车辆当前的行驶状态;车辆线性二自由度模型构建模块构建车辆二自由度动力学方程;转向策略获取模块跟踪理想横摆角速度,输出对应的前轮转角控制策略。本发明采用粒子群算法优化趋近率参数的滑模控制算法,进对于横摆角速度进行跟踪优化,使车辆更具备舒适性和操控稳定性。
Driving front wheel steering control system and method based on steer-by-wire
基于线控转向的主动前轮转向控制系统及方法
2024-08-09
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
Front Steering Control of Steer-by-Wire Based on Four-Wheel-Steering Theory
British Library Online Contents | 2005
|Steer-by-wire automobile front wheel steering load acquisition method and system
European Patent Office | 2024
|Front-Wheel Steer-By-Wire System
Springer Verlag | 2022
|