Research On Vibration Control Strategy Of Flywheel Battery Based On FPGA Controller

Flywheel battery has the characteristics of long service life,environment protection and so on.In order to improve the specific energy,the rotating speed of the flywheel rotor is usually very high,and the dynamic performance of the system is complicated.In order to restrain the vibration of flywheel rotor,the control strategy of Active Magnetic Bearing(AMB)is studied in this paper.The overall design scheme of the flywheel battery and the structure design scheme of the rotor are given.The transfer function of the electric control system is analyzed.The finite element model of the flywheel rotor system is established by using ANSYS software,and the modal analysis and harmonious response analysis are carried out.The fuzzy self-adjusting PID controller is designed with the aid of MATLAB fuzzy inference system,and the control system simulation and electromechanical system simulation are completed by using MATLAB/Simulink and Adams software.The effects of the incomplete differential PID control strategy and the fuzzy self-adjusting PID control strategy are compared.The hardware circuit of the digital controller based on FPGA chip is designed,including power circuit design,AD circuit design and FPGA external circuit.The research platform of digital controller is built by Quartus II,and the programs of the function modules are compiled with Verilog HDL.The high speed rotation test of the flywheel system is accomplished.The results show that,compared with the incomplete differential PID control strategy,the fuzzy self-adjusting PID control strategy can realize the on-line adjustment of the control parameters and restrain the vibration of the flywheel rotor more effectively.The flywheel rotor can smoothly cross the critical speed and the flywheel battery has better dynamic performance.