Research On Modeling And Control Simulation & Strategy For Levitation System Of Maglev Train

The successful operation of High-speed Maglev train indicates inevitability of universal commercial application. The super high speed of Maglev train brings heavy demands of safe assurance and reliable control system. Whenever the Maglev train starts, the levitation of the whole train is necessary and the Levitation Control System (LCS) should maintain the statbility of the vertical force to assure the security of the operation. Furthermore, the quality of LCS has much to do with the security and comfortability of passengers. Thus the performance and personality of levitation electromagnet and LCS are the problems that need to be researched on. Studying on the LCS technology is on the way of theory research and experiment stage in China, and accomplishment comes out usually. Once a breakthrough appears in this key technology, it will provide safe assurance for credible operation of Maglev technology nationalization, as well as be fundamental but crucial insurance.The thesis proceeds from a point of stability and security of LCS of TR08 Maglev train, and introduces the operational principle, especially the levitation principle, with specific analysis. On the basis of this, the thesis gives analysis and simplification of the levitation control electromagnetic field from both magnetic and kinetic angle. Then a model of single levitational electromagnet is established by MATLAB, and two methods of linearization are applied on such nonlinear model.Secondly, by using the LCS model, the thesis gives detailed analysis on the main factors which influence the levitational vertical and attraction force. And the control plant is obtained. Then, based on the analysis of model, the thesis takes attempts of different control strategies on the Maglev model, and shows the simulation results. The fourth chapter introduces the two nonlinear control strategies, and the sliding mode controller based on the feedback linearization is realized by MATLAB simulation. The left part states and analyzes the minor factors of the levitation control, which have been ignored in the process of modeling.The last but no the least, a conclusion is presented. The author makes a prospect of Maglev.