Research On Vibration Control Strategy Of The Maglev Motorized Spindle

The maglev motorized spindle is supported by active magnetic bearing(AMB).It has more advantages over the traditional motorized spindle in vibration control and service life.The vibration control strategies of the maglev motorized spindle was studied in this thesis.The maglev motorized spindle prototype was developed.The main parameters of the prototype were presented.The virtual instrument based on LabVIEW was developed,which can be used to acquire the data of rotor vibration and control current.Coupling between the radial freedom of the rotor was analyzed.The Cross-Feedback control strategy is designed to decouple the radical coupling.The co-simulation confirmed that the control strategy can help to improve rotary accuracy.The Fuzzy Variable Parameter control strategy was also designed,which can adjust the control parameters online based on the rotor vibration.The co-simulation results showed that the control strategy had better dynamic characteristic.Taking account of the advantages of the two control strategies,the Fuzzy Variable Parameter control strategy based on the Cross-Feedback control strategy was designed.The corresponding code was developed,and the rotation experiment with high speed were performed.The results showed that vibration of the rotor in the operating speed range is effectively suppressed,and the dynamic performance of the prototype is improved,compared with the incomplete differential PID control strategy.