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S5 Controle Ativo de Vibrações e Estruturas Inteligentes |
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Title:
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DYNAMICS AND CONTROL OF RIGID ROTORS SUPPORTED ON TILTING-PAD JOURNAL BEARINGS WITH ELECTRONIC OIL INJECTION
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Summary :
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THIS WORK PRESENTS AN ANALYSIS OF THE BEHAVIOR OF RIGID ROTORS
CONTROLLED BY TILTING-PAD JOURNAL BEARINGS WITH ACTIVE OIL INJECTION.
INITIALLY THE MATHEMATICAL MODEL OF THE ACTIVE BEARING IS PRESENTED:
THE EQUATIONS THAT DESCRIBE THE HYDRAULIC ACTUATORS ARE
INTRODUCED INTO THE LUBRICANT S EQUATIONS, RESULTING IN THE
MODIFIED REYNOLDS EQUATION. THE GLOBAL MODEL OF THE SYSTEM IS
OBTAINED BY COUPLING THE MOVEMENT EQUATION OF THE RIGID ROTOR
WITH THE STIFFNESS AND DAMPING MATRICES OF THE ACTIVE BEARING
(WICH ARE OBTAINED FROM THE MODIFIED REYNOLDS EQUATION). THIS
GLOBAL MODEL IS THEN USED TO DESIGN THE CONTROL SYSTEM OF THE
ACTIVE BEARING, WICH IS BASED ON THE POLE PLACEMENT
TECHNIQUE. THE STABILITY OF THE ACTIVE SYSTEM DESIGNED IS
ANALYSED BY CALCULATING ITS EIGENVALUES AND FREQUENCY RESPONSE
CURVES. THE RESULTS OBTAINED SHOW THAT THIS KIND OF BEARING
CAN SIGNIFICANTLY REDUCE THE VIBRATION LEVEL OF ROTORMACHINERY. |
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Author :
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Santos, Ilmar Ferreira
Scalabrin, Alexandre 0
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Paper View :
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