Nonlinear Dynamics of Malev Vehicle under Aerodynamic Lift

doi:10.3901/JME.2021.14.223

Abstract

Abstract: The aerodynamic lift force of maglev train at high speed includes the steady component and the unsteady fluctuation component, and the unsteady aerodynamic lift force can be regarded as periodic disturbance. A two-stage suspension model of a maglev system with nonlinear electromagnetic force is established and the governing equation is derived. The nonlinear response characteristics of the maglev system considering steady and periodic unsteady aerodynamic lift are analyzed by the incremental harmonic balance method. The comparison of linear and nonlinear models, the analysis of the influence law of control gain parameters and gas dynamic coefficient are carried out. The results show that when PD controller is used, the aerodynamic force of periodic disturbance will cause the vehicle vibration center to shift, and the feedback control parameters have a great influence on the vibration shift.

Key words: maglev train, aerodynamic lift, incremental harmonic balance method, feedback control, nonlinear response

CLC Number:

O322

WU Han, ZENG Xiaohui. Nonlinear Dynamics of Malev Vehicle under Aerodynamic Lift[J]. Journal of Mechanical Engineering, 2021, 57(14): 223-231.

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