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2002 Fiscal Year Final Research Report Summary

Nonlinear dynamics of an elastic rotor levitated on high-Tc superconducting bulks

Research Project

Project/Area Number 13650258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionKeio University

Principal Investigator

SUGIURA Toshihiko  Keio University, Faculty of Science and Technology, Associate Professor, 理工学部, 助教授 (70265932)

Project Period (FY) 2001 – 2002
Keywordssuperconducting levitation / nonlinear coupling / electromagnetic force / coupled vibration
Research Abstract

Engineering structures often include periodically connected same parts. Though most design of such coupled multiple degree-of-freedom structures is based on linear analysis, if the coupling is nonlinear, they can show more difficult but interesting phenomena such as mode interaction, spatio-temporal dynamics and complexity.
High-temperature superconducting levitation systems, achieving stable levitation without contact support, are expected to be applied to flywheels and linear-drives. As one modeling of such application systems, we consider a magnetically coupled multiple degree-of-freedom system consisting of several permanent magnets and superconducting bulks, in order to examine nonlinear dynamics of a coupled system. Compared with coupled structures with mechanical contact forces, it can easily show, due to small damping, complicated motion caused by nonlinear interaction between levitated magnets and superconducting bulks.
We applied POD (Proper Orthogonal Decomposition) to time series data obtained by experiments and numerical analysis, and found some change of spatial coherence between all the oscillators, which is accompanied by qualitative change of each oscillator's motion due to bifurcation.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 浦 広樹(他3名): "高温超電導磁気浮上連鎖系における動力学現象のPODを用いた解析"日本機械学会Dynamics and Design Conference 2002 CD-ROM論文集. (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉浦 壽彦(他2名): "高温超電導磁気浮上連鎖系における非線形動力学現象"日本機械学会Dynamics and Design Conference 2003 論文集. (発表予定). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sugiura, et al.: "Magnetic Stiffness of a coupled high-Tc superconducting levitation system"Physica C.. (to be published). (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 黒田 賢一(他2名): "高温超電導磁気軸受で支持された回転体の共振点通過現象"日本機械学会Dynamics and Design Conference 2001 CD-ROM論文集. (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉浦 壽彦(他1名): "上下動する高温超電導磁気浮上系に生じる自転現象"電気学会リニアドライブ研究会資料. LD-01-111. 23-27 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Kuroda, T.Sugiura and T.Kugiya: "Passing through Resonance of a Rotor Supported by a High-Tc Superconducting Bearing"JSME Proc.Dynamics and Design Conference 2001. (CD-ROM). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sugiura and S.Hayakawa: "Spin Motion Observed in a High-Tc Superconducting Levitation System Excited Vertically"IEE Japan Linear-Drive workshop. LD-01-111. 23-27 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ura, T.Sugiura, K.Morita and K.Kuroda: "Analysis of Dynamics in a Coupled High-Tc Superconducting Levitation System by Proper Orthogonal Decomposition"JSME Proc.Dynamics and Design Conference 2002. (CD-ROM). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ura, T.Sugiura, K.Morita and K.Kuroda: "Nonlinear Dynamics in a Coupled High-Tc Superconducting Levitation System (Analysis of Time Series and Spatial Coherence)"JSME Proc.Dynamics and Design Conference 2003. (to be presented).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sugiura, H.Ura, and K.Kuroda: "Magnetic stiffness of a coupled high-Tc superconducting levitation system"Physica C. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2004-04-14  

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