Research Of Magnetic Levitation Ball And Its Control System

The magnetic levitation technology is an emerging high technology and new technologywhich depends on electromagnetic force, the magnetic object can be suspended withoutmechanical contact, due to its non-contact characteristics, it can effectively prolong the servicelife of the equipment. So it’s widely used in many in today’s industries. And the study ofcomplex multi degree of freedom magnetic levitation system can be directly from the researchresults of single degree of freedom magnetic levitation system, therefore, for the research on asingle degree of freedom magnetic suspension ball control system has very important practicalsignificance to the development of magnetic suspension technology.In this paper, the electromagnetic system of the magnetic levitation ball has beendesigned, and the equations of suction system are deduced. The stability of the system areanalyzed and deduced, the conditions for the robust stability of the system are determined, andon the basis of it, the PID controller is designed. Then the control system are simulated usingthe Simulink software, Through the PID parameter tuning has been made repeatedly, thesatisfactory results of the system has been got.Sensors used in magnetic levitation system are introduced in detail, and to be compared,and then the final choice of position sensor is determined. And every detecting circuit isanalyzed in detail， the detection scheme is determined. Then the measurement circuit of eddycurrent sensor has been analyzed. Simulating test is proceeded by the Protues simulationsoftware，and the feasibility was verified.This paper proposes a hybrid power amplifier model, and use Multisim10circuitsimulation software to analysis its characteristics. The results show that, the hybrid poweramplifier is compared with the traditional linear power amplifier, which has faster dynamicresponse and lower power consumption, and fully able to meet the requirements of themagnetic levitation control system.