Design and Implementation of Control System Based on DSP and FPGA for Magnetically Suspended Control Moment Gyro

In order to implement the high stability and low vibration suspension control of magnetically suspended control moment gyro (MSCMG). This article describes the design and implementation of control system based on digital signal processor (DSP) and field programmable able gate array (FPGA) for MSCMG. The controller takes DSP as the master controller to perform the core control algorithms such as decentralized PID control, cross feedback control and adaptive notch control. The FPGA as a coprocessor for data acquisition of the 6-channel displacement and current, the speed measurement of the gimbal servo system and high-speed rotor, the generating of the threelevel pulse width modulation (PWM) and the timing planning of the whole control system. Performance testing results are proved the validity of the proposed control system based on the MSCMG prototype system. Experiment results show that the maximum radial position error at the rotation speeds of 3000 rpm /min is less than 5% of the protection gap．