Design of Active Hybrid Control System for Quasi Zero Stiffness Magnetic Suspension Isolation Platform
To enhance the isolation performance of the quasi zero stiffness magnetic levitation isolation platform,reduce the inter-ference of vibration sources on the isolation object,and optimize the design of its active hybrid control system.Modify the sensors,power amplifiers,and drive equipment,adjust the controller to the active hybrid mode,improve the connection relationships of the system circuit,and complete the design of the control hardware system.Simulate the working process of the quasi zero stiffness mag-netic levitation isolation platform,and detect the vibration status of the isolated object on the platform through the data acquisition,feature extraction,and feature matching of the platform.The real-time electromagnetic force of the quasi zero stiffness magnetic levi-tation isolation platform is measured under the vibration conditions,which is taken as the initial value for the platform control.With the support of electromagnetic theory,the active hybrid control function of the magnetic levitation isolation platform is achieved from both active and hybrid aspects through the calculation of electromagnetic force and current control quantities.Experimental results show that after the application of the active hybrid control system,the vibration amplitude and frequency attenuation rate of the isola-ted object in the quasi zero stiffness magnetic levitation isolation platform are increased by 62.34％and 32.005％,respectively.It has obvious advantages of control effect in the quasi zero stiffness magnetic levitation isolation platform.
quasi zero stiffness magnetic levitationvibration isolation platformactive hybrid controlcurrent control quantity
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