Research On Electromechanical Coupling Guidance Of Low Speed Maglev Train

As a new type of transport system, maglev train has many advantages such as high speed, comfortable, safety, friendly environment compatibility which have been reach consensus by people. Industrially advanced countries such as Germany and Japan, the research on maglev technology has come into the stage of practical application, maglev train becomes an important choice for future transportation system. So the research and development of maglev train is very important for our country to improve the railway technology and build a diversified transport system.Curve negotiation ability of low speed maglev train has a direct relation to the application prospect. This paper takes a domestic test vehicle which is under developing as the research object and carries out some research on electromechanical coupling guidance capability. The purposes are to obtain the relationship between mechanical guide function and electrical guide function, give some theoretical basis of Chinese low-speed maglev train research and promote its development and application.Generally speaking, the following work has been done in this paper.At first, guide principle of traditional railway and maglev train was analyzed, module's equilibrium position when in curve was obtained and electromagnet dynamic guide force was calculated. Through the calculation of electromagnetic force, we found that maglev train should be equipped with mechanical guide mechanism in order to pass curve. Then, magnetic suspension control system model was established by MBS dynamics software, and the reasonable position of the control point was studyed. Lastly, the whole vehicle model including control system was established, and some research on electromechanical coupling guidance was carried out. The research indicates that mechanical guide mechanism is an absolutely necessary component for low speed maglev train, which has an important effect to the guidance capability, lateral displacement, yaw etc. Large guide force should be afforded by electromagnet to overcome the constraint force that carbody acts on running gear when maglev train pass curve while does't equipped with mechanical guide mechanism, The relationship between mechanical guide and electrical guide is coupled, the train can not pass curve if either of them does't work. Some main mechanical components were also analyzed which may affect the curve negotiation. The analysis will provide some theoretical support and guideline for the design of forced steering mechanism, anti roll bar, air spring and so on.The work of this paper may provide a solid foundation for solving the problems in the design of low speed maglev train and give some reference for the further research on this aspect.