| Project/Area Number |
59850039
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
機械力学・制御工学
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| Research Institution | UNIVERSITY OF TOKYO, Institute of Industrial Science |
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Principal Investigator |
OKA KOICHI (1985-1986) INSTITUTE OF INDUSTRIAL SCIENCE, UNIVERSITY OF TOKYO, 生産技術研究所, 助手 (10160649)
樋口 俊郎 (1984) 東京大学, 生産技術研究所, 助教授
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| Co-Investigator(Kenkyū-buntansha) |
MIZUNO TAKESHI THE INSTITUTE OF VOCATIONAL TRAINING, 講師 (20134645)
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| Project Period (FY) |
1984 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥15,000,000 (Direct Cost: ¥15,000,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 1984: ¥9,700,000 (Direct Cost: ¥9,700,000)
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| Keywords | magnetic bearing / balancing machine / balancing / 不つり合い / 磁気浮上 |
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| Research Abstract |
In this research a new type of balancing machine is developed. The developed balancing machine uses magnetic bearings not only as devices supporting a rotor but also as devices measuring unbalance. The principle of measuring unbalance of the developed machine is as follows. The active magnetic bearing can control its bearing force dynamically. The investigators have proposed a control method of estimating the unbalance forces acting on the suspended rotor and cancelling them by magnetic bearing forces during the rotor running. When the rotor is suspended by magnetic bearing with the above-mentioned controller, the resultant bearing forces indicate the amount and location of unbalances in the rotor.
The following results are obtained in this research.
(1) The effectiveness of the proposed method measuring unbalance is studied experimentally. In the experiment a totally active magnetic bearing spindle is used as a single-plane balancing machine. The experimental results demonstrate the feasibility of the proposed balancing machine with magnetic bearing.
(2) A balancing instrument with magnetic bearing which can determine two-plane corrections is desiged and built. The instrument can be used as a horizontal-type balancing machine or as a vertical-type balancing machine.
(3) A balancing instrument which can support and test a rotor with various size is designed and built. The instrument is composed of two radial magnetic bearing units and two axial magnetic bearing units. These units are fixed to a base. The arrangements of the units are adjustable according to the length of the rotor. Moreover the radial position of the magnets and the sensors of the radial magnetic bearing can be adjusted according to the diameter of the rotor.
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