| The role of Maglev system is to use of electromagnetic force to overcome the object's gravity,and the object maintain a fixed position along or around one or few axis of a reference framework with no contact between the suspension and the support. Thus overcoming the energy consumption and speed limits caused by friction, the system has a series of merits such as no wear, without lubrication ,no pollution, no noise, long life as well as be safe and reliable and so on, received attention at home and abroad. Based on the theory of Maxwell's equations , the design and experimental methods have a very good application.Maglev system design involves electromagnetic theory, structural mechanics, power electronics, control theory, sensors and detection technologies, Through the research of performance characteristics of maglev system, the dissertation analyzes the design methods and characteristics of its whole modules—excitation system ,power amplifier system ,sensor system and the regulator . Then the dissertation takes a single degree of freedom maglev sphere system for example , on the basis of the foundation of its mathematic model , based on the principle of modular design and digital design, the paper establishes its experimental circuit and the physical model.After the completeness of the model , on the foundation of the electromagnetic theory , the dissertation establishes the suction characteristics of its excitation system as well as the magnetic field distribution testing equipment of the sensor system .Then we make the analysis of the force characteristics of the testing results , obtain the suction-current characteristics as well as the suction-displacement characteristics of the excitation system .Afterwards we carry on the analysis of the magnetic field distribution data of the sensor system , find out the best laying position of the sensor system. Combining with the characteristics of the maglev control system , we take PID control mode which parameters are captured through the critical proportion law, namely through designing the whole model experimental programme , tracking the testing results , and finally realize the stable suspension of objection. |
