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Stability analysis and vibration suppression in an overhung rotor system using active magnetic damper.

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Title: Stability analysis and vibration suppression in an overhung rotor system using active magnetic damper.
Authors: Singh, Shashank Shekhar1 (AUTHOR) shashank.singh1951@gmail.com, Kumar, Punit1 (AUTHOR)
Source: Journal of Vibration & Control. Apr2025, Vol. 31 Issue 7/8, p1294-1312. 19p.
Subjects: Eigenvalues, Rotors, Speed
Abstract: The present work demonstrates the effectiveness of an active magnetic damper (AMD) in improving the vibration characteristics of an overhung rotor system (ORS) considering the effects of synchronous mass-unbalance, rotor bow, and viscous internal damping. A finite element-based rotordynamic analysis has been conducted to evaluate the system response using state-space formulation. MATLAB codes are developed for the numerical implementation of the rotordynamic model pertaining to the flexible ORS integrated with an AMD consisting of three parallel feedback loops. The internal damping is found to reduce the vibration amplitudes at the bearing and disk locations. However, it leads to system instability in the absence of AMD beyond the first critical speed (670 RPM) which is indicated by the change in the real part of eigenvalues. Under these circumstances, the use of AMD causes a remarkable improvement and the system stabilizes for almost the entire speed range considered here, 320–10,000 RPM. In addition, the AMD causes a maximum reduction of 95.8%, 96.5%, and 83.3% in the vibration amplitudes at the locations of Bearing 1, Bearing 2, and the overhung disk, respectively. Using an appropriate set of AMD parameters, the system characteristics can be altered effectively as per the requirement. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Vibration & Control is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 184233862
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Stability analysis and vibration suppression in an overhung rotor system using active magnetic damper.
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  Data: <searchLink fieldCode="AR" term="%22Singh%2C+Shashank+Shekhar%22">Singh, Shashank Shekhar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> shashank.singh1951@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Kumar%2C+Punit%22">Kumar, Punit</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Vibration+%26+Control%22">Journal of Vibration & Control</searchLink>. Apr2025, Vol. 31 Issue 7/8, p1294-1312. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Eigenvalues%22">Eigenvalues</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors%22">Rotors</searchLink><br /><searchLink fieldCode="DE" term="%22Speed%22">Speed</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The present work demonstrates the effectiveness of an active magnetic damper (AMD) in improving the vibration characteristics of an overhung rotor system (ORS) considering the effects of synchronous mass-unbalance, rotor bow, and viscous internal damping. A finite element-based rotordynamic analysis has been conducted to evaluate the system response using state-space formulation. MATLAB codes are developed for the numerical implementation of the rotordynamic model pertaining to the flexible ORS integrated with an AMD consisting of three parallel feedback loops. The internal damping is found to reduce the vibration amplitudes at the bearing and disk locations. However, it leads to system instability in the absence of AMD beyond the first critical speed (670 RPM) which is indicated by the change in the real part of eigenvalues. Under these circumstances, the use of AMD causes a remarkable improvement and the system stabilizes for almost the entire speed range considered here, 320–10,000 RPM. In addition, the AMD causes a maximum reduction of 95.8%, 96.5%, and 83.3% in the vibration amplitudes at the locations of Bearing 1, Bearing 2, and the overhung disk, respectively. Using an appropriate set of AMD parameters, the system characteristics can be altered effectively as per the requirement. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Vibration & Control is the property of Sage Publications, Ltd. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1177/10775463241240525
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 19
        StartPage: 1294
    Subjects:
      – SubjectFull: Eigenvalues
        Type: general
      – SubjectFull: Rotors
        Type: general
      – SubjectFull: Speed
        Type: general
    Titles:
      – TitleFull: Stability analysis and vibration suppression in an overhung rotor system using active magnetic damper.
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            NameFull: Singh, Shashank Shekhar
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            NameFull: Kumar, Punit
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            – D: 01
              M: 04
              Text: Apr2025
              Type: published
              Y: 2025
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              Value: 31
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              Value: 7/8
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            – TitleFull: Journal of Vibration & Control
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