A study on restriction of electro-mechanical coupling vibration in magnetic levitation system by power conversion technique

本课题的研究对象为磁弹性耦合梁系统、磁轴承悬浮多体、磁悬浮结构等机电耦合系统。该系统具有空间分布的连续结构，但磁力是离散的。本课题组对电气系统与机械系统之间出现的耦合振动的约束进行了研究。该方法通过电气系统具有利用电力电子器件进行限制的可能性。传统的耦合复杂系统设计是为了避免耦合的共振和非线性。该方法不能实现系统的优化设计。在这两方面的基础研究的基础上，把握系统的动力学特性是十分重要的。本课题对磁悬浮系统的动力学进行了实验和数值研究。研究结果表明：(1)磁体的位置越多，对空间分布的钢结构悬浮效果越好。通过实验和数值讨论证实了其重要性。特别是，在分布式结构中出现的波的动力学，应该清楚地了解，以限制系统的一个元件的振动。(2)重新考虑机械动力学中的基本方程来表示耦合振动的特性。通过电力电子控制的方法在系统中没有表现出明显的局限性。(3)考虑由直线电机驱动的铁板。掌握了机械系统与磁系统的关系。(4)提出了约束多体系统共振振动的方法并进行了验证。实验结果表明，该方法本身可以应用于磁悬浮分布结构。所获得的结果已在交易和国内会议上发表。少

This research project has been targeting the magneto-elastic coupled beam system, the multi-bodies suspended by magnetic bearings, magnetically levitated structures and so on as electro-mechanical coupled systems. The systems have a spatially distributed continuous structure, but the magnetic force is placed discretely. Our research group has studied on the restriction of the coupled vibration which appears between the electrical system and mechanical one. The method through the electrical system has a possibility of the restriction by using power electronics. Conventionally, the coupled complex system has been designed to avoid the resonance and nonlinearity of the coupling. The method did not achieve the optimal design of the systems. Then it is important to grasp the dynamics of the system based on the both fundamental researches. In this project the dynamics of magnetically suspended systems have been studied experimentally and numerically.The obtained results are as follows:(1) Th … More e placements of magnets are substantial to suspend the spatially distributed steel structure by magnetic levitation techniques. The importance was confirmed by experimental and numerical discussion. Especially, the dynamics of waves, which appear in the distributed structure, is should be clearly understood to restrict the vibration in an element of the system.(2) The fundamental equations in the mechanical dynamics were reconsidered to represent the characteristics of the coupling vibration. The control method through the power electronics did not show the remarkable restriction in the system.(3) The iron slab, which is driven by a linear motor, was considered. The relation between the mechanical system and magnetic one was grasped.(4) The method for restricting the resonant vibration in multi-body system was proposed and confirmed. The experimental result showed the possibility to apply it teself to the magnetically levitated distributed structures.The obtained results have been published in transactions and domestic meetings. Less