摘  要：针对某空间扫描镜伺服系统技术要求，采用永磁同步电机直接驱动扫描镜。控制器采用了位置环、速度环和电流环控制器三环设计。通过Matlab/Simulink对扫描伺服系统进行软件仿真。仿真结果表明：输入给定位置周期信号，系统扫描周期精度在0.696±0.001 s之内，且匀速旋转（角速度5.808 rad/s，稳速精度0.3%）的运行角度范围大于58°，满足了扫描伺服系统的性能指标要求。
关键词：变速扫描伺服系统；永磁同步电动机；直接驱动；仿真

Abstract: Designed high-precision space speed-variable scanning device based on PMSM direct drive according to the requirements of scanning system.The algorithm was adopted as a triple-loop control structure，composed by current loop,velocity loop and position loop.Using Matlab/Simulink tools the control system software simulation was made.The simulation result indicated that the scanning period accuracy was within 0.696±0.001s with the given input position period,and the motion degree with the constant speed of 5.808 rad/s and stable tolerance of 0.3% was more than 58°.The system can satisfy the requirement of scanning system.
Key Words: Speed-variable scanning servo system；PMSM；Direct drive;Simulation