High-speed Maglev System on A Straight Guideway Against Stochastic Stability

Destabilization of a maglev vehicle occurs by a splitting of its motion that results in the formation of multiple branches separated under intrinsic excitation. The purpose of the paper focuses on stochastic stability to establish a two-freedom mechanical model with a magnetic bogie and a vehicle, considering the intensity of a bogie mass and the intensity of a vehicle mass, and applying the methods of boundary category, probability density contours, and Lyapunov exponent respectively to stochastic stability analysis based on Hamilton theory and the stochastic average theory. The results show that the system tends to the equilibrium point, energy consumption in the linear airspring damping and equivalent magnetic dynamic damping reduce vibration amplitude, which have a good linear effect on stochastic stability. Probability density contours present multi-peak jump phenomena increased with the intensity of a bogie mass and the intensity of a vehicle mass.