Vibration Control of a Flexible Shaft Supported by a Hybrid Foil-Magnetic Bearing

Title
Vibration Control of a Flexible Shaft Supported by a Hybrid Foil-Magnetic Bearing
Authors
정세나안형준김승종이용복
Issue Date
2010-09
Publisher
Proceedings of the 8th IFToMM Int’l Conf. on Rotor Dynamics
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/41757
Appears in Collections:
KIST Publication > Conference Paper
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