Research On The Guideway-Vehicle Coupling Nonlinear Dynamic Problems Of The EMS High-Speed Maglev

The coupling vibration between the vehicle and guideway sets a high standard for the guideway construction, which leads to high cost investment for the maglev system. This makes it a practical significant issue to do a thorough research of the vibration.In this paper, the dynamic characteristics associated with the high-speed maglev vehicle and guideway coupling system has been studied. Two issues are discussed: one is the asymptotic stability of the system and the other is the coupling vibration characteristic. The basic relation between the control, structure and coupling parameters is studied emphatically to trace the rule of the vibration and to give help for the design of guideway, vehicle structures and controller.The single point suspending control system in one dimension, the single magnet module with two controllers coupling in two dimensions and the single chassis system with four controllers coupling in three dimensions are studied orderly. For the single point suspending system, the double loops-PID control algorithm is given, The asymptotic stable range of the coupling system and vibration caused by the Hopf bifurcation near the critical state and the nonlinearity of the system are researched first. Subsequently, the special elastic coupling manner of the high-speed maglev is considered, and the restriction between the coupling factor of the single magnet module and other system parameters is studied. The influence of the coupling factor on the vehicle and guideway coupling vibration is also valued. To overcome the difficulty in chassis modeling, the fixed interface mode synthesize super-element method is used. Two kinds of high-speed elastic chassis models are constructed to continue the exact analysis of the single chassis suspension system. Finally, the simulation of the dynamic suspending stability on the linear guideway is carried out. The dynamic response of the chassis system running on the transition curve based on the iron and concrete material guideway curve are separately and comparatively studied.This paper contributes to vehicle and guideway coupling dynamic analysis. (1) The maglev coupling suspending control system is divided into three levels to simplify analysis: single point, magnet module and single chassis. (2) The study gives the relations between the stability and the guideway & magnet coupling, the restriction among the guideway, magnet, chassis structure and control parameters under asymptotic stable state. (3) The vibration condition and characteristics of two kinds vehicle and guideway coupling vibration are educed: one is that the vibration happens when the control parameters are near the critical state and the Hopf bifurcation appears, the other is that the nonlinear vibration caused by the system inherent vibration couples the self-excited vibration. (4) The special elastic uncoupling manner of the magnet and chassis is calculated to overcome the difficulty in chassis modeling. The relation between the...