Research On Control Technique Of Exhibition Maglev Train

This dissertation is achieved after the scientific research project supported by Scientific Committee of Shenyang "Development of the Small MAGLEV Train". The principle and composing are expounded, the mathematics model of the single magnetic suspension system is established, and the mathematic model in the equilibrium point is linearized, thus the state equation and transfer function of the system are obtained. Based on this, the controllability and observability of the system are analyzed, and the linear state feedback controller, PID controller and so on are designed for the magnetic suspension system. The operating result shows that the train can run calmly, four-point suspension is stable, the range of the error is±0.05mm, the plots of displacement and current are smooth, and the control effect is obtained.The control purpose, the control theory, the control strategy and the control circuit of the magnetism levitation and the composing of the driving circuit have been discussed, and the examination results has been analyzed, the fuzzy controller of the magnetism levitation train has been designed, and emulation results have been presented in the paper. The emulation impression indicates that fuzzy control has better dynamic performance than general PID control, and has the characteristic of quicker responses, stronger robustness, eliminate completely the system difference and make the system become error free fuzzy control system, answer for the control requests of the magnetism levitation trains.The four-point attraction magnetic suspension system has the coupling phenomenon between two points, so in order to acquire the expected features, a cross coupling adjustor is designed, which eliminates the coupling interfere signals. The satisfied performances of the new controller are acquired in the experiment.