| Project/Area Number |
13450090
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | Tohoku University |
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Principal Investigator |
TANI Junji Institute of Fluid Science, Tohoku University, Professor, 流体科学研究所, 教授 (30006192)
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| Co-Investigator(Kenkyū-buntansha) |
QIU Jinhao Institute of Fluid Science, Tohoku University, Associate Professor, 流体科学研究所, 助教授 (60241585)
TAKAGI Toshiyuki Institute of Fluid Science, Tohoku University, Professor, 流体科学研究所, 教授 (20197065)
ARAI Kenichi Institute of Electric Communication, Tohoku University, Professor, 電気通信研究所, 教授 (40006268)
MURAI Masanori Institute of Fluid Science, Tohoku University, Assistant, 流体科学研究所, 助手 (90292284)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥13,800,000 (Direct Cost: ¥13,800,000)
Fiscal Year 2002: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2001: ¥10,000,000 (Direct Cost: ¥10,000,000)
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| Keywords | Magnetic Force / Control / Giant Magnetostrictive Material / Piezoelectric Material / Effect of Inverse Magnetic Strain / Magnetic Levitation / Circuit of Magnetics |
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| Research Abstract |
A magneto-electric composite element of two functional materials: giant magnetostrictive (GMM) and piezoelectric materials, is developed for coil-less magnetic force control. This force control is based on the inverse magnetostrictive effect of GMM and realized by composing a closed parallel magnetic circuit with a permanent magnet in magnetic yoke. The magnetic force between two yokes can be adjusted by controlling the strain in the magnetostrictive rod. For the purpose of efficiently controlling the strain of the GMM rod, a magneto-electric composite element is constructed, in which the two functional materials: a giant magnetostrictive rod and a stack piezoelectric actuator, are mechanically coupled via strain. The magnetization in the GMM rod can be controlled by adjusting the voltage of the piezoelectric actuator. It is confirmed that this element works to adjust magnetic force and has wide frequency bandwidth. As an application of this element, a magnetic levitation system is proposed and the movable yoke was levitated by simple PD control. This system has advantages of low power consumptions and low heat generation compared with a conventional system with electromagnetic coils.
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