Abstract
In view of the current traffic criticism faced by urban construction and the quality development and personalized trend of future rail transit system, a new type of maglev rail transit system is proposed in this paper. The principles of the modules of train suspension guidance, linear drive and on-board communication are also introduced and analyzed in this paper. Additionally, the feasibility of train suspension structure is studied based on Ansoft Maxwell finite element simulation, which includes: under three-dimensional magnetic field, the static magnetic force of Halbach permanent magnet array is changed, and the safety and reliability of the permanent magnet suspension array are verified by comparing with the actual test vehicle sampling data; the critical stability characteristics of suspension structure under static magnetic field are proved by physical modeling. Therefore, the electromagnetic damping structure is introduced into the vehicle suspension frame to constitute the hybrid suspension control system of permanent magnet electromagnetic, and the hybrid suspension model is established, which proves that the hybrid suspension system has controllable observability. Finally, the linearized state feedback control strategy is designed for the single-point electromagnetic levitation ball system to simulate the compensation and regulation of the static magnetic field by the electromagnetic damping system. The excellent performance of the electromagnetic levitation ball also proves the feasibility and rationality of the electromagnetic control strategy. Compared with the traditional electromagnetic hybrid suspension system, this system realizes “zero” power suspension, and the energy consumption of train suspension is only consumed in the instant that the electromagnetic damping system is regulated.
Highlights
The problem of traffic congestion has been criticized during the development of domestic cities
The simulation data in this paper mainly focus on the analysis of the single point suspension structure without considering the coupling relationship between adjacent levitation points
Because the oscillation amplitude of the hybrid suspension control system is relatively small under the stable state, the suspension force under the static magnetic field can be approximately considered as a constant value, while the electromagnetic constrained damping system can suppress and adjust the momentum of the suspension oscillation
Summary
The problem of traffic congestion has been criticized during the development of domestic cities. Research shows that the energy consumption of rail transit is only 1/9 of that of a car and 1/2 of a bus under the same capacity It is a common understanding of the world to give priority to the development of public transport system with rail transit as its backbone and use it as an important way to solve urban traffic problems. The Maglev Research Center of Shanghai Tongji University and National University of Defense Technology has used permanent magnet array to build electromagnetic permanent magnetic hybrid suspension structure (such as Tongji University-Jiading maglev experimental line), and has successfully carried out the experiment Under this background, in 2014, Jiangxi University of Science and Technology proposed a new type of high-efficiency intelligent permanent magnet maglev rail transit system– ‘‘Rainbow’’, as shown in Figure 1 above.
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