基于DSP的电动助力转向系统的设计

摘要

电动助力转向(EPS)是一种新型的汽车动力转向技术.设计了一种基于TMS320LF2407A DSP控制的汽车电动助力转向系统,介绍了其硬件组成及软件结构,采用PID控制策略对电机电流进行闭环控制,利用PWM技术控制电机的电压,以调节助力电流达到助力转向的目的.并做了Matlab仿真实验,仿真结果表明,该系统具有良好的助力特性.%Electric power steering(EPS) is a new steering power technology for vehicles. One kind of automobile electric power steering system bascd on TMS320LF2407A DSP control is designed, and its hardware form and software frame are introduced. The system adopts PID control strategy to carry on closed loop control for motor current, and makes use of PWM technique to control motor voltage to adjust power current for power steering. The Matlab simulation experiment is performed. The simulation results prove that the system has well power characteristic.