| Project/Area Number |
14550216
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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 | Mie University |
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Principal Investigator |
MIZUTANI Kazuki Mie University, Faculty of Engineering, Professor, 工学部, 教授 (30023237)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Overhung rotor system / Vibration control / Gyroscopic effect / Unbalanced vibration / Robust control / Kalman filter |
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| Research Abstract |
This research studies an active vibration control system to effectively reduce the unbalanced vibration of rotating machinery with an overhung rotor. It is difficult to control vibrations of the overhung rotor directly because the vibration control system may be hardly equipped on the overhung rotor due to restrictions in construction of rotating machinery. In this study, the overhung rotor is supported by an actively flexible bearing pedestal as a vibration control device that is consisted of a flexibly supported bearing and electromagnetic actuators.
A high-speed overhung rotor has a very strong gyroscopic effect. Due to the gyroscopic effect, the x and y components of vibration of the overhung rotor couple each other, and a control gain to reduce vibration is dependent on a rotating velocity of the rotor. The H_∞ control is performed in the system as a robust control. In order to simplify the design of the H_∞ controller for the system with the gyroscopic action, the control gain is derived from state equations of overhung rotor system ignored the gyroscopic term by the H_∞ control theory that is estimated state variables by the Kalman filter for overhung rotor system with the gyroscopic action are used. As results of numerical simulation, use of the H_∞ controller developed in this study gives the similar effective vibration suppression but higher robustness in comparison with use of the optimal regulator theory. The simulated results are compared with experimental ones and both results show the similar tendency in this study.
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