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

本课题将磁弹性耦合梁系统、磁悬浮支承的多体、磁悬浮结构等作为机电耦合系统进行研究。系统具有空间分布的连续结构，但磁力是离散放置的。本课题组对电气系统与机械系统之间出现的耦合振动的限制进行了研究。这种通过电气系统的方法有可能受到电力电子设备的限制。传统上，耦合复杂系统的设计是为了避免耦合的共振和非线性。该方法没有达到系统的最优设计。然后，在这两个基础研究的基础上，掌握系统的动力学是很重要的。本课题对磁悬浮系统的动力学进行了实验和数值研究，得到的结果如下：(1)Th…更多的磁体放置对于通过磁悬浮技术悬浮空间分布的钢结构来说是实质性的。实验和数值讨论证实了这一点。特别是要清楚地了解分布式结构中出现的波动动力学，以约束系统中某一单元的振动。(2)重新考虑了机械动力学中的基本方程，以描述耦合振动的特征。电力电子学的控制方法在系统中没有表现出明显的约束。(3)考虑了直线电机驱动的铁板。掌握了机械系统与磁性系统的关系。(4)提出并验证了抑制多体系统共振的方法。实验结果表明，将其应用于磁悬浮分布式结构是可行的，所获得的结果已在会刊和国内会议上发表。较少

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