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针对磁悬浮高速电机的磁轴承-转子系统,设计了基于MCU+FPGA的数字控制系统。为实现转子系统的高转速下稳定控制,在建立了磁轴承-转子闭环控制系统模型的基础上,针对常规PID控制系统的超调振荡问题和PD控制系统的转子位移静差问题,利用变速积分的思想设计了改进的PID控制器。实验表明,在消除了系统静差的同时明显减小了系统的超调量和调节时间,说明设计的控制系统具有很好的动态特性和稳态精度。
Aiming at the magnetic bearing-rotor system of high-speed maglev motor, a digital control system based on MCU + FPGA is designed. In order to realize stable control of rotor system under high rotating speed, based on the model of magnetic bearing-rotor closed-loop control system, aiming at the problem of overshoot oscillation of conventional PID control system and rotor displacement static problem of PD control system, The idea of designing an improved PID controller. Experiments show that the system overshoot and adjustment time are obviously reduced while eliminating the system static error, indicating that the designed control system has good dynamic characteristics and steady-state accuracy.