扫描镜常用于获取空间光电信息，应用中对其快速启停和指向精度有较高的要求。针对永磁同步电机驱动扫描镜的运动方式，建立了电机Simulink仿真模型，并采用了三闭环矢量控制策略，提出了采用分段式比例积分微分(Proportion Integration Differentiation, PID)算法进行位置环控制的方法。结果表明，相较于传统的PID，分段式PID提高了系统的响应速度，同时控制精度和稳定性也有一定提升。

Scanning mirrors are often used to acquire space electro-optical information. Some applications have higher requirements for the fast start-stop response and pointing accuracy of scanning mirrors. According to the motion mode of a permanent magnet synchronous motor when it is driving a scanning mirror, a motor Simulink simulation model using three-closed-loop vector control strategy is established. A method which uses the sectional Proportional Integration Differentiation (PID) algorithm to control position loop is proposed. The results show that compared with the traditional PID, the sectional PID can enhance the response speed of the system. At the same time, it can also improve the control accuracy and stability of the system to acertain extent.