Apply Different Combinations State Feedback To Control Vehicle-Coupled-Guideway Vibration In Maglev Train

The Vehicle-Coupled-Guideway Vibration (VCGV) is one of the troubled maglev train development problems, whose mechanism is not very clear, and there is no particularly effective control method. The maglev train model with VCGV is a high-order nonlinear model, in the past designed by linear state feedback method has some value, but difficult to meet system for not reflecting the nature law of the VCGV.This paper simplified the guideway model to simple supported beam model and the suspension system to single-point suspension for study, beginning with analysis of different combinations state feedback on inhibiting the VCGV effects, and compared them on the merits.The study mainly analyzed three state feedback methods: state feedback of clearance, current and electromagnet vertical velocity; state feedback of clearance, clearance differential, current and electromagnet velocity; state feedback of clearance, clearance differential, current, electromagnet vertical velocity and electromagnet vertical displacement. Using nonlinear theory and simulation methods studied the stability range of each feedback coefficient and the stability character on the border point of stability range. The stability in the border point analysis use of Hopf bifurcation and other nonlinear mathematical tools to study the feedback control parameters caused by the VCGV. Then focus on the structural parameters, which also resulting system instability and the VCGV, reveal that the natural frequency of guideway and the stability of the system has important implications.By comparing three feedback control methods of their each feedback parameter stability range and structural parameters stability range obtained that increasing clearance differential feedback methods in suppressing the VCGV and improving system stability and system dynamic response at all is better than not joined the clearance differential feedback method; Increase electromagnet vertical displacement feedback method is beneficial to inhibit the VCGV caused by the Hopf bifurcation.