1995 Fiscal Year Final Research Report Summary
Development of Anti-Vibration Devices for Gondola Lifts
| Project/Area Number |
06555066
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Dynamics/Control
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MATSUHISA Hiroshi Kyoto University, Graduate School of Engineering, Professor, 工学研究科, 教授 (00109034)
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| Co-Investigator(Kenkyū-buntansha) |
OTAKE Yoshizo Anzensakudo, Chief Engineering Manager, 技術部, 部長
YASUDA Masashi Tokkyokiki Corp., Chief Engineering Manager, 技術部, 部長
IEMURA Hirokazu Kyoto Univ., Graduate School of Engi., Professor, 工学研究科, 教授 (10026362)
NISHIHARA Osamu Kyoto Univ., Graduate School of Engi., Instructor, 工学研究科, 助手 (00218182)
HONDA Yoshihisa Kyoto Univ., Graduate School of Engi., Instructor, 工学研究科, 助手 (60181559)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Vibration Control / Dynamic Damper / Gyroscopic Device / Chair Lift / Godola Lift / Wind-Induced Vibration / Magnetic Damper / Control Moment Gyro |
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| Research Abstract |
Swing of a ropeway carrier is easily caused by wind and it is very difficult to reduce. In this study, two methods, dynamic absorber and control moment gyro were investigated. Base on the theory of dynamic ansorber formulated by the authors, the actual dynamic absorbers composed of a moving mass and a circular track for chair lifts and gondola were built. The damping force was induced by eddy current caused by permanent magnets on the moving mass and an aluminum track. The stopper at the end of track should have a low coefficient of restititution and a high damping ratio. Since the natural frequency of the gondola varies depending on the locating of the gondola, the double absorber system which had two different natural frequencies was introduced and it showed the robustness.
The passive-type gyroscopic damper (50kg) was composed. The axle of rotor was supported by a sping and a damper, and the tilt of the axle could be assumed to have one degree of freedom. The experiments with two gyros were carried out with two types of gondola (500kg, 6 passengers, and 2500kg, 39 passengers). The swing of free response was settled in 2 and 10 periods, respectively. This system has more robustness for the varies of natural frequency of the main system.
The dynamic absorber was already used in snow skiing sites in Hokkaido, and it is proved that the gyro can be used in the actual gondola.
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