Research On Guidance Dynamics Of EMS High-Speed Maglev Train

The electromagnetic suspension(EMS) high-speed maglev system has three major functions,namely, suspension, guidance and traction,which are non-contact and active control. At present researches on the suspension and traction technology are much more than the guidance, in fact, the latter is also important. There came guidance problems in the tests of national maglev system, which reflects our lack of deep understanding about the guidance system. Therefore, systemic study of the guidance dynamics is proposed in this paper, in order to fill the blank in this research of our country.Set in this topic research on the suspension and guidance technology of high-speed maglev system undertaken by our school, this paper launches dynamics study of maglev guidance system by means of the mathematical modeling and simulation. The main contents and novel work are as follows:1. The equivalent parameter model of the vechicle structure is obtained by means of theoretical calculation and experimental measurements. Mathematical models of the raiway system are established based on solution to differential equation of plane curve.2. Dynamics modeling choosing the orbital coordinates system as the correlative coordinate system for each rigid body of the vehicle is advanced. The deviation and yaw foumulas of the rigid body tracing the guideway are derived, which solves the problem of dynamics modeling for the vehicle system.3. Formula of electromagnetic force is derived by using the flux tube method and is verified by using the finite element analysis, when there is a yaw angle between the guidance magnetic pole and guideway. On this basis,formulas of electromagnetic force and moment for guidance electromagnet negotiating the curve are established.4. Formulas of deformation and function for the primary suspension device, motion state and function for the secondary suspension device are deduced, which solves the problem of the force and moment calculations for suspension devices.5. Guidance dynamic simulations and analyses of maglev systems are completed, including single bogie system, two bogies system and the whole train, and availability and rationality of the simulation models are verified with test results.High-speed maglev train with join-strucure and pendulum-strucure is a complex dynamics system, this paper first studies guidance dynamics when train running on the curve. The test results show that the models established are available and rational.