2007 Fiscal Year Final Research Report Summary
Development of Spring Actuator Stacked of Iron Powder Layers with Electromagnetic Control
| Project/Area Number |
18560220
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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 | Gunma University |
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Principal Investigator |
NAGAYA Kosuke Gunma University, School of Engineering, Professor (70007186)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Actuator / Spring / Iron powder layer / Electromagnetic Force / Control / Large Displacement / Large Damping / Vibration Isolation |
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| Research Abstract |
A new spring type actuator is presented in which controls are possible by using usual control methods such as PID control. The actuator consists of a usual helical coil spring and a number of iron (ferrite) powder layers inside. The iron layers are made of silicon based adhesive material involving iron particles. The layers are pasted to the coil spring with a certain air gap between each layer. To achieve both extensive and compressive motions, a permanent magnet is attached to the top of the spring and electromagnet to the base, and the motion of the top of the actuator is controlled by electric currents in the coil of the electromagnet. A method of forming the actuator is presented, and its design formulae are presented. Especially, the work area is large enough in spite of the size being small in comparison with other actuators. The actuator is utilized to a vibration isolation system, and it is ascertained that the actuator can control vibrations of the vibrating body to be significantly small under the disturbance cancellation control method developed by the present author.
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