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Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings
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SYSNO ASEP 0335159 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Numerical Simulation Feedback Control Fluid-Induced Instabilities In Rotor System Supported By Hydrodynamic Bearings Author(s) Ferfecki, Petr (UT-L) RID
Ondrouch, Jan (UT-L)
Poruba, Z. (CZ)Source Title Active Noise and Vibration Control Methods. - Krakow : AGH University of Science and Technology, 2009 - ISBN 83-89772-06-X Pages s. 41-50 Number of pages 10 s. Publication form CD-ROM - CD-ROM Action Conference on Active Noise and Vibration Control Methods /9./ Event date 24.05.2009-27.05.2009 VEvent location Zakopane Country PL - Poland Event type EUR Language eng - English Country PL - Poland Keywords active control ; rotor system ; hydrodynamic bearing instability Subject RIV JR - Other Machinery CEZ AV0Z20760514 - UT-L (2005-2011) Annotation Hydrodynamic bearings are frequently used due to their large carrying capacity and favourable damping characteristics. However for the operation at higher revolutions the fluid-induced instabilities known as oil whirl and oil whip can appear. The mathematical model of the rotor system is assembled under the assumption of rigid shaft, massless bearing shells and nonlinear bearing forces determined on the base of short cylindrical bearing theory from Reynolds equation. By proposed feedback controller the movable bearing shells are directly excited by kinematic excitation. On the base of simulations it was found out that the displacement amplitude of shaft with feedback control was always reduced in the whole revolution range and the limit of oil whirl was shifted to the higher revolutions in case of properly chosen control parameters. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2010
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