Dynamic characteristics of high temperature superconductor bulk magnetic suspension system

The magnetic levitation technology was regarded as a preferable alternative for the next generation of launcher system owing to its cost-effectiveness and perfect performance. A research plan was performed in our lab by constructing a scale-model suspension system with high temperature superconductor (HTS) bulks over a Nd-Fe-B guideway for launch assistance. An dynamic experimental platform was established to investigate the dynamic characteristics including amplitude frequency response characteristic, damping characteristic, levitated 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 lowest 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 enough to stabilize the levitation system during the low frequency and also was influenced by the vibration speed. By qualitative analysis the dynamic performance which could provide a evaluation for the stabilization of the magnetic levitation system and also provide a guidance for stability and security of the launch assistance suspension system.