"Numerical simulation of feedback controlled fluid-induced instabilities in rotor system supported by hydrodynamic bearings"@en . "Numerical simulation of feedback controlled fluid-induced instabilities in rotor system supported by hydrodynamic bearings" . "Sikora, Roman" . "20" . "kinematic excitation; hydrodynamic bearing instability; rotor system"@en . . "RIV/61989100:27230/10:86076229" . . . . "Z(MSM6198910027)" . "3" . "Archives of Control Sciences" . "Poruba, Zden\u011Bk" . . "PL - Polsk\u00E1 republika" . . . . . . "Numerical simulation of feedback controlled fluid-induced instabilities in rotor system supported by hydrodynamic bearings" . "1230-2384" . "15"^^ . "In certain operating conditions, the oil-film forces, by which the hydrodynamic bearings act on the rotor, destabilize and induce a self-excited vibration. In this paper several concepts based on controlled kinematic excitation of the bearing shells is investigated by computer simulation and by experimental test. The mathematical model of the uncontrolled and controlled rotor system contains the nonlinear hydrodynamic forces determined by the solution of the Reynolds equation assuming short case of bearing. The computer simulations were performed for rotor system without feedback control and with feedback controller. Results of the computer simulations proved that the analyzed approaches reduce amplitude of the rotor vibration caused by the imbalance forces. Experimental test and computer simulations demonstrate that the active vibration control increases considerably the rotation speed when the self-excited vibration of the oil-film occurred."@en . "[23E6C8A096BC]" . "275638" . "2"^^ . . "Numerical simulation of feedback controlled fluid-induced instabilities in rotor system supported by hydrodynamic bearings"@en . . "In certain operating conditions, the oil-film forces, by which the hydrodynamic bearings act on the rotor, destabilize and induce a self-excited vibration. In this paper several concepts based on controlled kinematic excitation of the bearing shells is investigated by computer simulation and by experimental test. The mathematical model of the uncontrolled and controlled rotor system contains the nonlinear hydrodynamic forces determined by the solution of the Reynolds equation assuming short case of bearing. The computer simulations were performed for rotor system without feedback control and with feedback controller. Results of the computer simulations proved that the analyzed approaches reduce amplitude of the rotor vibration caused by the imbalance forces. Experimental test and computer simulations demonstrate that the active vibration control increases considerably the rotation speed when the self-excited vibration of the oil-film occurred." . . . "27230" . . "3"^^ . . "RIV/61989100:27230/10:86076229!RIV11-MSM-27230___" . "Ferfecki, Petr" .