Abstract
In order to analyze the dynamic response of medium-speed maglev train in the speed range of 0–200 km/h, the suspension performance, suspended energy consumption, and riding comfort of the train stimulated by random track irregularities are discussed in this paper. Firstly, the model of medium-speed maglev train including car body, air spring vibration isolation system, and the suspension system is established. Then, a controller based on flux inner feedback loop and PID outer feedback loop is designed for the suspension system. The established model is stimulated by the actual track power spectrum in full speed range. The simulation results show that the fluctuation of suspension gap is less than ±4 mm. Furthermore, thanks to the adding of permanent magnet, the power consumption is significantly reduced, which is of benefit to the electromagnet heating problem and on-board levitation power supply system. The riding comfort of the train moving on the irregular track using Sperling index is assessed. The experimental results validate the effectiveness of the proposed analytical calculation model of medium-speed maglev train. It is shown that medium-speed maglev train achieved good performance, significant power reduction, and satisfactory riding comfort.
Highlights
As a new type of rail transportation, maglev train applies electromagnetic force to support the vehicle without contact and is propelled by linear motor
In the analytical calculation model, this paper mainly studies the vibration, pitch, and roll characteristics of the vehicle
Design of PID Controller Based on Magnetic Flux Density Feedback. e hybrid suspension system is an inherently unstable system. e suspension system usually takes the fixed suspension clearance z0 as the control target, which requires the fluctuation range of the suspension gap to be within a certain range, so as to ensure that the suspension electromagnet does not contact with the track
Summary
As a new type of rail transportation, maglev train applies electromagnetic force to support the vehicle without contact and is propelled by linear motor. In order to offer an alternative method of transportation between large cities and satellite cities, China has studied the medium-speed hybrid levitation maglev train with the highest speed of 200 km/h. Is type of maglev train applies both the electromagnet and the permanent magnet as a hybrid suspension structure, which can effectively reduce suspension power consumption and improve suspension. In order to design and optimize the suspension power supply system for medium-speed maglev trains, it is necessary to analyze the suspension power consumption of the whole vehicle with different loads and at different speeds.
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