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    Damping Ratio Estimation Techniques for Rotordynamic Stability Measurements

    Source: Journal of Engineering for Gas Turbines and Power:;2009:;volume( 131 ):;issue: 001::page 12504
    Author:
    C. Hunter Cloud
    ,
    Eric H. Maslen
    ,
    Lloyd E. Barrett
    DOI: 10.1115/1.2967484
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Rotor stability is most commonly estimated using methods derived from a simple single degree of freedom system. When the modes of more complex systems, such as rotors, are closely spaced, we demonstrate that such methods can yield very poor estimates of the modal stability (damping ratio). Multiple output backward autoregression (MOBAR) is proposed as an alternative approach and is demonstrated to yield reasonably accurate estimates of modal damping even when modes are closely spaced. The performance of the MOBAR approach is then examined on an experimental rotor in tilt-pad bearings, demonstrating good performance in a realistic measurement setting.
    keyword(s): Stability , Measurement , Damping , Rotors AND Bearings ,
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      Damping Ratio Estimation Techniques for Rotordynamic Stability Measurements

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/140543
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    • Journal of Engineering for Gas Turbines and Power

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    contributor authorC. Hunter Cloud
    contributor authorEric H. Maslen
    contributor authorLloyd E. Barrett
    date accessioned2017-05-09T00:32:48Z
    date available2017-05-09T00:32:48Z
    date copyrightJanuary, 2009
    date issued2009
    identifier issn1528-8919
    identifier otherJETPEZ-27051#012504_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/140543
    description abstractRotor stability is most commonly estimated using methods derived from a simple single degree of freedom system. When the modes of more complex systems, such as rotors, are closely spaced, we demonstrate that such methods can yield very poor estimates of the modal stability (damping ratio). Multiple output backward autoregression (MOBAR) is proposed as an alternative approach and is demonstrated to yield reasonably accurate estimates of modal damping even when modes are closely spaced. The performance of the MOBAR approach is then examined on an experimental rotor in tilt-pad bearings, demonstrating good performance in a realistic measurement setting.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDamping Ratio Estimation Techniques for Rotordynamic Stability Measurements
    typeJournal Paper
    journal volume131
    journal issue1
    journal titleJournal of Engineering for Gas Turbines and Power
    identifier doi10.1115/1.2967484
    journal fristpage12504
    identifier eissn0742-4795
    keywordsStability
    keywordsMeasurement
    keywordsDamping
    keywordsRotors AND Bearings
    treeJournal of Engineering for Gas Turbines and Power:;2009:;volume( 131 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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