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Type: Artigo de periódico
Title: Identification of unbalance forces by metaheuristic search algorithms
Author: de Castro, HF
Cavalca, KL
de Camargo, LWF
Bachschmid, N
Abstract: This paper discusses the identification of parameters in rotary systems, namely, the unbalance magnitude, phase and position in the rotor system. These parameters can be identified using the measured orbits in the hydrodynamic bearings. The oil film forces are evaluated in the different positions of the orbit of the journal and are applied to the model of the shaft. The model, integrated in time domain, allows with an assumed unbalance, to simulate the orbits. The objective function is basically the difference between measured and simulated orbits, and its minimum corresponds to the identified unbalance amount, phase and position along the shaft. With respect to traditional model based identification procedures, this approach using oil film forces instead of oil film linearized stiffness and damping coefficients, and unfiltered orbits instead of 1X vibration components is suitable to deal with non-linear behaviour of the system. (c) 2010 Elsevier Ltd. All rights reserved.
Subject: Rotor dynamics
Hydrodynamic journal bearings
Genetic algorithms
Simulated annealing
Country: Inglaterra
Editor: Academic Press Ltd- Elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.ymssp.2009.11.012
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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