Research on high precision permanent magnet servo control system for laser communication

With the continuous improvement of communication quality such as communication distance, speed, capacity and reliability, laser communication will become an important communication means in the future due to its advantages of high bandwidth, large capacity, anti-interference and strong reliability[1]. Permanent magnet synchronous motor (PMSM) has been widely applied in industrial control field due to its advantages such as simple structure, small volume, low rotational inertia, high torque and current ratio, high efficiency, and easy to heat dissipation and maintenance. Because of its high accuracy and fast response, vector control technology is a fast developing method of PMSM in recent years. Therefore, the research of PMSM vector control technology is of great practical significance. This paper completes the design of hardware and software using DSP+FPGA as the control core using vector PWM technique in SVPWM mode, and rely on indoor laser communication system simulations are carried out to verify the performance of the platform for the whole design, application of the technology can fully meet the requirements of the laser communication system tracking accuracy to 8μrad (3σ), the debugging results show good dynamic and static performance of the system.