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    Identification of Instantaneous Frequency and Damping From Transient Decay Data

    Source: Journal of Vibration and Acoustics:;2020:;volume( 142 ):;issue: 005::page 051111-1
    Author:
    Jin, Mengshi
    ,
    Chen, Wei
    ,
    Brake, Matthew R. W.
    ,
    Song, Hanwen
    DOI: 10.1115/1.4047416
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Jointed interfaces, damage, wear, or non-idealized boundary conditions often introduce nonlinear characteristics to assembled structures. Consequently, extensive research has been carried out regarding nonlinear system identification. The development of nonlinear system identification is also enabling the intentional application of nonlinearities towards practical fields such as vibration control and energy harvesting. This research proposes a nonlinear identification procedure that consists of two steps: first, the raw data is filtered by the Double Reverse Multimodal Decomposition method that involves system reconstruction, expansion, and filtering twice. Second, the Peak Finding and Fitting method is applied to the filtered signal to extract the instantaneous amplitude and frequency. The identification procedure is applied to the measured responses from a jointed structure to assess its efficacy. The results are compared with those obtained from other well-known methods—the Hilbert transform and zero-crossing methods. The comparison results indicate that the Peaking Finding and Fitting method extracts the amplitude of the response signal more accurately. Consequently, this yields a higher signal-to-noise ratio in the extracted damping values. As a recommended last step, uncertainty assessment is conducted to calculate the 95% confidence intervals of the nonlinear properties of the system.
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      Identification of Instantaneous Frequency and Damping From Transient Decay Data

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4275469
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    contributor authorJin, Mengshi
    contributor authorChen, Wei
    contributor authorBrake, Matthew R. W.
    contributor authorSong, Hanwen
    date accessioned2022-02-04T22:23:30Z
    date available2022-02-04T22:23:30Z
    date copyright6/26/2020 12:00:00 AM
    date issued2020
    identifier issn1048-9002
    identifier othervib_142_5_051111.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4275469
    description abstractJointed interfaces, damage, wear, or non-idealized boundary conditions often introduce nonlinear characteristics to assembled structures. Consequently, extensive research has been carried out regarding nonlinear system identification. The development of nonlinear system identification is also enabling the intentional application of nonlinearities towards practical fields such as vibration control and energy harvesting. This research proposes a nonlinear identification procedure that consists of two steps: first, the raw data is filtered by the Double Reverse Multimodal Decomposition method that involves system reconstruction, expansion, and filtering twice. Second, the Peak Finding and Fitting method is applied to the filtered signal to extract the instantaneous amplitude and frequency. The identification procedure is applied to the measured responses from a jointed structure to assess its efficacy. The results are compared with those obtained from other well-known methods—the Hilbert transform and zero-crossing methods. The comparison results indicate that the Peaking Finding and Fitting method extracts the amplitude of the response signal more accurately. Consequently, this yields a higher signal-to-noise ratio in the extracted damping values. As a recommended last step, uncertainty assessment is conducted to calculate the 95% confidence intervals of the nonlinear properties of the system.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleIdentification of Instantaneous Frequency and Damping From Transient Decay Data
    typeJournal Paper
    journal volume142
    journal issue5
    journal titleJournal of Vibration and Acoustics
    identifier doi10.1115/1.4047416
    journal fristpage051111-1
    journal lastpage051111-18
    page18
    treeJournal of Vibration and Acoustics:;2020:;volume( 142 ):;issue: 005
    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
    yabeshDSpacePersian