汽车线控转向系统电机冗余控制研究

Research on Motor Redundancy Control of Automotive Steer-by-wire System

针对电动汽车线控转向系统转向执行电机使用过程中位置传感器失效的问题,提出一种永磁同步电机无位置传感器冗余控制方法。文章选用内置式永磁同步电机作为线控转向系统的转向执行电机,首先对永磁同步电机的数学模型进行建模分析,其次利用电机转子的凸极特性,采用高频电压信号注入法获取电机转子的位置信息并进行解耦,从而实现电机的无位置传感器控制,最后在Matlab/Simulink软件中对搭建的电机控制模型进行仿真实验,证明控制策略的可行性。

A redundant control method for permanent magnet synchronous motors without position sensors is proposed to address the issue of position sensor failure during the use of the steering actuator motor in electric vehicle wire controlled steering systems.This article selects a built-in permanent magnet synchronous motor as the steering actuator motor for a wire controlled steering system,Firstly,the mathematical model of permanent magnet synchronous motor is modeled and analyzed.Secondly,the salient pole characteristics of the motor rotor are utilized to obtain the position information of the motor rotor using high-frequency voltage signal injection method and decouple it,thus achieving sensorless control of the motor.Finally,simulation experiments are conducted on the constructed motor control model in Matlab/Simulink software to prove the feasibility of the control strategy.