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Type: Artigo
Title: Linear parameter varying control design for rotating systems supported by journal bearings
Author: Siqueira, Adriano Almeida Gonçalves
Nicoletti, Rodrigo
Norrick, Nicklas
Cavalca, Kátia Lucchesi
Castro, Helio Fiori de
Bauer, Jens
Dohnal, Fadi
Abstract: Linear parameter varying (LPV) control is a model-based control technique that takes into account time-varying parameters of the plant. In the case of rotating systems supported by lubricated bearings, the dynamic characteristics of the bearings change in time as a function of the rotating speed. Hence, LPV control can tackle the problem of run-up and run-down operational conditions when dynamic characteristics of the rotating system change significantly in time due to the bearings and high vibration levels occur. In this work, the LPV control design for a flexible shaft supported by plain journal bearings is presented. The model used in the LPV control design is updated from unbalance response experimental results and dynamic coefficients for the entire range of rotating speeds are obtained by numerical optimization. Experimental implementation of the designed LPV control resulted in strong reduction of vibration amplitudes when crossing the critical speed, without affecting system behavior in sub- or super-critical speeds
Subject: Vibração
Country: Reino Unido
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.jsv.2012.01.009
Date Issue: 2012
Appears in Collections:FEM - Artigos e Outros Documentos

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