基于V模式的线控转向前轮转角控制研究

Steer-by-Wire Front Wheel System Control Research Based on V mode

针对车辆线控转向前轮转角控制精度要求高、建模困难等问题,利用线控转向硬件在环试验台开展线控转向前轮转角控制研究。基于V模式控制器开发思路,利用LabVIEW系统辨识工具获得了线控转向前轮转角控制系统数学模型,设计了最少拍无波纹随动控制器,并进行系统离线仿真和硬件在环试验,结果表明前轮转角执行电机响应快,几乎没有超调量,系统进入稳定时间短。说明所设计的最少拍无波纹随动控制器能有效地解决系统快速性和超调之间的矛盾,取得较好的控制效果。

To solve the problem that front wheel control of vehicle steer-by-wire（SBW） system has high control precision and is difficult based on model, we studed the SBW front wheel system based on the hardware-in-the-loop test bench. Under the guidance of the controller development of ideas V model, we first set up the mathematical model of the front wheel system using LabVIEW System Identification Toolkit. Then we designed the least sample time none-wave adaptive system. The control system was carried out by off-line simulation and hardware-in-the-loop test. The results show that the front wheel motor has fast response, almost no overshoot, and the time for system stable is short. Both rapidity and follow-up can satisfy the requirement of the steering motor control. The research of Steer-by-Wire Front Wheel System controller can effectively solve the contradiction between speed and overshoot, and achieves better control effects.