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中文摘要：
针对传统机械轴承、液浮轴承和气浮轴承支承的自由摇滚系统的缺陷,提出了一种磁悬浮自由摇滚系统,介绍了其总体结构和工作原理,并对磁轴承和电涡流位移传感器进行了设计.基于模态分析理论,对自由摇滚系统定、转子共振频率和振型进行分析.在此基础上,利用有限元法对自由状态下和电磁力约束下的定、转子部件进行了模态计算和分析.结果表明,约束状态下定、转子一阶共振频率分别为323Hz和401Hz,两者相差78Hz,避免了系统同时出现共振,从而为控制系统的研究奠定了基础.
英文摘要：
To remedy the limitation of conventiona! free-to-rock system supported by mechanical bearing, liquid bearing and gas bearing, a novel magnetic bearing free-to-rock system was presented. Its structure and operating principle were introduced. The magnetic bearings and current eddy displacement sensors were designed. Based on modal theory, the resonance frequencies and models of statar and rotor of free-to-rock system were analyzed. Upon this, the models under free and electromagnetic force states were calculated by Finite Element Method（FEM）. The results show the first frequencies of stator and rotor were 323Hz and 401Hz, respectively. The frequency difference was 78Hz, which indicted that no resonance occurred simultaneously. And the foundation for the study of controUing system was established.
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