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�������պ����ѧѧ�� 2007, Vol. 33 Issue (01) :38-41    DOI:
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����1, ����1, ���Ľ�1, ����2*
1. �������պ����ѧ �ѧԺ, ���� 100083;
2. �й���ѧԺ�繤�о���, ���� 100080
Dynamic characteristics of high temperature superconductor bulk magnetic suspension system
Wen Zheng1, Liu Yu1, Yang Wenjiang1, Qiu Ming2*
1. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Institute of Electrical Engineering, Chinese Academy of Sciences , Beijing 100080, China

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Abstract�� 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.
Keywords�� dynamic response   damping   vibration measurements   frequencies   magn etic levitation     
Received 2006-02-20;


About author: �� ��(1978-), ��, ����������, ��ʿ��,wenzheng@sa.buaa.edu.cn.
����, ����, ���Ľ�, ����.���³������������Ƽ�����̬���Ե��������[J]  �������պ����ѧѧ��, 2007,V33(01): 38-41
Wen Zheng, Liu Yu, Yang Wenjiang, Qiu Ming.Dynamic characteristics of high temperature superconductor bulk magnetic suspension system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(01): 38-41
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