2007 Fiscal Year Final Research Report Summary
A Study on Anti-Vibration Control Using 5-Axes Magnetic Bearing for Structure
| Project/Area Number |
18560223
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Tokyo University of Agriculture and Technology |
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Principal Investigator |
WAKUI Shinji Tokyo University of Agriculture and Technology, Institute of Symbiotic and Technology, Professor (70334472)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Magnetic bearing / Turbo molecular pump / Anti-vibration / Bending mode / Feedforward |
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| Research Abstract |
To suppress the vibration of mechanical structures, the tuning mass dampers, active mass dampers, and some kind of rubbers etc. have been commonly used. However, anti-vibration effect is limited and cannot set designedly. To overcome these circumstances, we formulate a plan that the turbo molecular pump is utilized to suppress the vibration. Since its pump is suspended by the magnetic bearings, then the reaction forces are easily generated by using the forced excitation based on the vibration signals. Namely we intend to realize the vacuum and anti-vibration functions simultaneously. In this research, by utilizing the radial control freedom of magnetic suspended rotor the objective is to demonstrate that the first and second bending modes of steel plate can be simultaneously suppressed.
Firstly, the feedback control system is constructed based on the motional mode of rotor. Continuously, the feedforward control system to generate the reaction forces is implemented. Next, the steel plate is impacted by the hummer As a result, 1st and 2nd bending vibrations are suppressed using the feedforward signals under the condition of none rotation. Finally, the rotor is driven under the low vacuum environment realized by using the vane pump. The steel plate vibrations with 1st and 2nd bending can be suppressed under the condition 3,000rpm. Then we accomplish this research purpose successfully.
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