An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems
This brief describes an active control method to prevent unwanted nonlinear vibration response modes of a rotor-dynamic system. Nonlinear stiffness of components that support or surround a machine rotor can cause a response branch that extends critical vibration (resonance) over a wide interval of r...
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th-cmuir.6653943832-535572018-09-04T09:51:32Z An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems Chakkapong Chamroon Matthew O T Cole Theeraphong Wongratanaphisan Engineering This brief describes an active control method to prevent unwanted nonlinear vibration response modes of a rotor-dynamic system. Nonlinear stiffness of components that support or surround a machine rotor can cause a response branch that extends critical vibration (resonance) over a wide interval of rotational speeds. Within this interval, jump transitions between alternative low amplitude and high amplitude response modes become possible. This brief explains how such behavior can be eliminated by applying control forces to the rotor based on dynamic feedback of strains measured in the stator structure. An optimal model-based controller synthesis is considered that combines a Lur'e-type Lyapunov function with a quadratic cost measure to penalize controller gain and bandwidth. Results are presented for an experimental flexible rotor system where nonlinear rotor-stator interaction occurs through a bearing with radial clearance. An active magnetic bearing applies control forces to the rotor in a separate plane. The results show that the control technique can eliminate jump response modes and can significantly reduce mechanical stress associated with rub interaction of the rotor and stator. The influence of key parameters in the model and controller formulation is shown. © 2013 IEEE. 2018-09-04T09:51:32Z 2018-09-04T09:51:32Z 2014-01-01 Journal 10636536 2-s2.0-84899923061 10.1109/TCST.2013.2265740 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84899923061&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/53557 |
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Engineering Chakkapong Chamroon Matthew O T Cole Theeraphong Wongratanaphisan An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
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This brief describes an active control method to prevent unwanted nonlinear vibration response modes of a rotor-dynamic system. Nonlinear stiffness of components that support or surround a machine rotor can cause a response branch that extends critical vibration (resonance) over a wide interval of rotational speeds. Within this interval, jump transitions between alternative low amplitude and high amplitude response modes become possible. This brief explains how such behavior can be eliminated by applying control forces to the rotor based on dynamic feedback of strains measured in the stator structure. An optimal model-based controller synthesis is considered that combines a Lur'e-type Lyapunov function with a quadratic cost measure to penalize controller gain and bandwidth. Results are presented for an experimental flexible rotor system where nonlinear rotor-stator interaction occurs through a bearing with radial clearance. An active magnetic bearing applies control forces to the rotor in a separate plane. The results show that the control technique can eliminate jump response modes and can significantly reduce mechanical stress associated with rub interaction of the rotor and stator. The influence of key parameters in the model and controller formulation is shown. © 2013 IEEE. |
format |
Journal |
author |
Chakkapong Chamroon Matthew O T Cole Theeraphong Wongratanaphisan |
author_facet |
Chakkapong Chamroon Matthew O T Cole Theeraphong Wongratanaphisan |
author_sort |
Chakkapong Chamroon |
title |
An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
title_short |
An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
title_full |
An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
title_fullStr |
An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
title_full_unstemmed |
An active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
title_sort |
active vibration control strategy to prevent nonlinearly coupled rotor-stator whirl responses in multimode rotor-dynamic systems |
publishDate |
2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84899923061&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/53557 |
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