Active tilting-pad journal bearings supporting flexible rotors: Part II–The model-based feedback-controlled lubrication

Jorge Andrés González Salazar, Ilmar Santos

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    Abstract

    This is part II of a twofold paper series dealing with the design and implementation of model-based controllers meant for assisting the hybrid and developing the feedback-controlled lubrication regimes in active tilting pad journal bearings (active TPJBs). In both papers theoretical and experimental analyses are presented with focus on the reduction of rotor lateral vibration. This part is devoted to synthesising model-based LQG optimal controllers (LQR regulator + Kalman Filter) for the feedback-controlled lubrication and is based upon the mathematical model of the rotor-bearing system derived in part I. Results show further suppression of resonant vibrations when using the feedback-controlled or active lubrication, overweighting the reduction already achieved with hybrid lubrication, thus improving the whole machine dynamic performance.
    Original languageEnglish
    JournalTribology International
    Volume107
    Pages (from-to)106-115
    ISSN0301-679X
    DOIs
    Publication statusPublished - 2017

    Keywords

    • Active vibration suppression
    • Actively-lubricated bearing
    • Rotordynamics
    • Tilting-pad journal bearing

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