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Research on Magnetic Suspension Control Methods and Its Digital Realization
Author: ShengRongRong
Tutor: ZhangKunLun
School: Southwest Jiaotong University
Course: Power Electronics and Power Drives
Keywords: magnetic suspension system nonlinearities DSP variable structure sliding mode controller
CLC: U266.4
Type: Master's thesis
Year: 2006
Downloads: 169
Quote: 6
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Abstract
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As a new type of conveyances, Maglev train has aroused more and more attention because of its high velocity, safety and comfort, few pollution and low noise. As to the maglev vehicle system, suspension control technology is one of the most nuclear and key techniques. The performance of magnetic suspension is determined mainly by its control system. Due to the inherent nonlinearities and open-loop instability of the magnetic suspension system, as well as the problem of uncertainties caused by parameter variety and disturbance, increase the difficulty of magnetic suspension control technology. Therefore, it has great significance to study control methods of suspension system.In this paper, based on the maglev vehicle system, the suspension controllers are designed, which mostly aims at the single magnetic levitation system (SMLS). First of all, the basic structure and principle of the SMLS will be discussed as well as a mathematical model will be founded. The factors, which influence the performance of the system, will be analyzed and the relative solution will be brought. A robust variable structure sliding mode controller is designed. The performance of variable structure controller 、 PID controller、 linear state-feedback controller are compared and evaluated, proved the feasibility and stability of the variable structure controller.After that, according to the trait of the SMLS, the digital suspension controller based on double DSPs is designed. The hardware architecture and software design flow are introduced in detail. The levitation experiment results show that the robustness, stability and disturbance suppression are verified. The SMLS’s stable suspension can be obtained by using the digital controller mentioned above.
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CLC: > Transportation > Rail transport > Locomotive works > EMU,EMU (power train ) > Non- wheel rail Department of locomotives, Maglev,gas floating car
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