Vibration Control of a Flexible Shaft Supported by a Hybrid Foil-Magnetic Bearing
- Vibration Control of a Flexible Shaft Supported by a Hybrid Foil-Magnetic Bearing
- 정세나; 안형준; 김승종; 이용복
- Issue Date
- Proceedings of the 8th IFToMM Int’l Conf. on Rotor Dynamics
- Hybrid foil-magnetic bearing is a synergistic cross-fertilization of two oil-free bearing technologies to take advantage of the strengths of each bearing with minimizing each other weaknesses. This paper presents vibration control of a flexible shaft supported by a hybrid foil-magnetic bearing. An experiment set-up of a flexible shaft supported by a hybrid foil-magnetic bearing is built. Rotor dynamic analysis of the flexible shaft on critical speeds is performed. Then, unbalance responses of the flexible shaft supported by three different bearings: gas-foil, magnetic and hybrid bearings are compared to verify the effectiveness of the hybrid bearing. In particular, the shaft vibration in a bending mode is significantly suppressed by the hybrid foil-magnetic bearing rather than gas-foil or magnetic bearing. Finally, effects of load sharing between air-foil and magnetic bearings are investigated through changing control gain and offset displacements of the magnetic bearing.
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