| The trend of urban construction towards greenness,intelligence and individuation is becoming more and more obvious.Magnetic levitation technology has the advantages of superior performance,wide adaptability and high intelligence.It is the first choice to solve the problem of urban traffic congestion,and it is also an important technology to realize the efficient urban traffic network in the future.It is regarded as the research hotspot of the next generation urban rail transit technology.This paper introduces a new type of permanent magnet maglev rail transit system--"Rainbow ".The main work of this paper is as follows:Firstly,the principle study of the suspension system.The three-dimensional magnetic field model is built,using Ansoft Maxwell simulation platform,and the feasibility of train suspension structure is analyzed.The static magnetic field distribution based on Halbach permanent magnet array is studied and compared with the sampling data of the actual test vehicle.The safety and reliability of the permanent magnetic levitation array are verified.The critical stability of the suspension structure under static magnetic field is proved by physical modeling.Secondly,it is directed to the inherent instability characteristics of permanent magnet suspension structures.In this paper,the electromagnetic damping structure is introduced into the vehicle suspension frame to form the permanent magnet electromagnetic hybrid suspension control system.In this paper,a hybrid suspension model is established,and it is proved that the hybrid suspension system has controllability and observability.A linearized state feedback control strategy is designed under the mixed suspension state space equation to simulate the compensation and regulation of the static magnetic field by the electromagnetic damping system.The good control effect of electromagnetic suspension ball also proves the feasibility and rationality of electromagnetic control strategy.Thirdly,the control strategy for the train multi-point suspension system.according to the research platform of fixed height magnetic suspension ball,the suspension control strategy based on fuzzy PID is designed,and expands it into a four-point suspension control system,and the suspension position deviation compensator is introduced to establish the coupling relationship among the subsystems,so as to improve the overall stability control ability of the suspension frame.Finally,the simulation results on MATLAB show that each subsystem has good anti-jamming ability,and the suspension frame can achieve balanced and stable control under different interference signals. |
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