The magnetic levitation technology was regarded as a preferable alternative for the next generation of launcher system owing to its cost-effectivenes s and perfect performance. A research plan was performed in our lab by constructing a scale-model suspension system with high temperature superconduct o r (HTS) bulks over a Nd-Fe-B guideway for launch assistance. An dynamic experi me ntal platform was established to investigate the dynamic characteristics includi ng amplitude frequency response characteristic, damping characteristic, levitate d stiffness and so on. The experimental result show that the resonant frequency is decreased with the increase of the field cooling(FC) position and reach lowes t at zero field cooling(ZFC) position. The static-stiffness is decreased with the increase of the suspension gap and dynamic stiffness was influenced by the FC position. Damping, the ability of a system to decrease oscillatory seems not e nough to stabilize the levitation system during the low frequency and also was i nfluenced by the vibration speed. By qualitative analysis the dynamic performanc e which could provide a evaluation for the stabilization of the magnetic levitat ion system and also provide a guidance for stability and security of the launch assistance suspension system.
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