摘要：永磁同步电机矢量控制并没有完全实现各变量的解耦控制，为此采用反馈线性化变换推导出完全解耦的永磁同步电机线性化模型。为了解决传统反馈线性化控制对电机参数较为依赖，易受外部干扰和参数变化影响的缺点，将具有快速收敛特性的终端滑模控制算法应用到永磁同步电机反馈线性化模型中，通过理论分析证明了控制系统的稳定性，推导出了控制律。仿真结果验证了算法的有效性。
关键词：永磁同步电机; 反馈线性化; 终端滑模控制

Abstract: The requirements of high pointing accuracy and sufficient bandwidth to reject satellite disturbances is the major problem and obstacle in the laser beam Pointing, Acquisition and Tracking (PAT) system for space optical communication. In order to achieve these demanding requirements, this paper adopted a new highaccuracy Fine Pointing Mechanism (FPM), which was controlled by a dualloop controller with the current loop and the position loop. Also, a notch filter was designed in the control system to suppress the system resonance. Finally, a simulation platform for the FPM control system was built to verify the performance of the proposed algorithm. And the simulation results show that the designed control strategy can achieve good performance in dynamicstate and steadystate. The bandwidth of the system is about 22461 Hz for small signal disturbances on the order of 001 degrees, and larger disturbances of 2 degrees can be rejected below 305176 Hz. At the same time, the static pointing precision can be controlled in the range of 15 microradians.
Key words: space laser communication; fine pointing mechanism; dualloop controller; notch filter