Transient rotor/active magnetic bearing control using sampled wavelet coefficients

Iain S. Cade; Patrick S. Keogh; M. Necip Sahinkaya

doi:10.1115/1.2436570

Transient rotor/active magnetic bearing control using sampled wavelet coefficients

Iain S. Cade, Patrick S. Keogh, M. Necip Sahinkaya

Department of Mechanical Engineering

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

A novel method for transient rotor/active magnetic bearing control using sampled wavelet coefficients is proposed. Control currents are formulated in the wavelet transform domain, prior to signal reconstruction. The wavelet based controller is designed from target transient responses due to step changes in wavelet coefficients of applied forces. Transient system dynamics are embedded in the controller and evaluated from on-line system identification. Experimental validation is undertaken using a flexible rotor/active magnetic bearing system. Mass loss tests were performed at two critical speeds corresponding to near sudden changes in unbalance that are capable of exciting rotor dynamic modes in a transient manner The controller is shown to suppress the transient responses within a finite settling time.

Original language	English
Pages (from-to)	549-555
Number of pages	7
Journal	Journal of Engineering for Gas Turbines and Power: Transactions of the ASME
Volume	129
Issue number	2
DOIs	https://doi.org/10.1115/1.2436570
Publication status	Published - 2007
Event	ASME Turbo Expo 2006 - Barcelona Duration: 1 May 2006 → …

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http://dx.doi.org/10.1115/1.2436570

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PLATFORM GRANT: CENTRE FOR POWER TRANSMISSION AND MOTION CO NTROL
Burrows, C., Bowen, C., Bowyer, A., Edge, K., Hawley, G., Johnston, N., Keogh, P., Ngwompo, R., Sahinkaya, M. N. & Tilley, D.
Engineering and Physical Sciences Research Council
1/05/04 → 30/04/09
Project: Research council

Cite this

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title = "Transient rotor/active magnetic bearing control using sampled wavelet coefficients",

abstract = "A novel method for transient rotor/active magnetic bearing control using sampled wavelet coefficients is proposed. Control currents are formulated in the wavelet transform domain, prior to signal reconstruction. The wavelet based controller is designed from target transient responses due to step changes in wavelet coefficients of applied forces. Transient system dynamics are embedded in the controller and evaluated from on-line system identification. Experimental validation is undertaken using a flexible rotor/active magnetic bearing system. Mass loss tests were performed at two critical speeds corresponding to near sudden changes in unbalance that are capable of exciting rotor dynamic modes in a transient manner The controller is shown to suppress the transient responses within a finite settling time.",

author = "Cade, {Iain S.} and Keogh, {Patrick S.} and Sahinkaya, {M. Necip}",

note = "ID number: ISI:000245836300030; ASME Turbo Expo 2006 ; Conference date: 01-05-2006",

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doi = "10.1115/1.2436570",

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AU - Cade, Iain S.

AU - Keogh, Patrick S.

AU - Sahinkaya, M. Necip

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PY - 2007

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N2 - A novel method for transient rotor/active magnetic bearing control using sampled wavelet coefficients is proposed. Control currents are formulated in the wavelet transform domain, prior to signal reconstruction. The wavelet based controller is designed from target transient responses due to step changes in wavelet coefficients of applied forces. Transient system dynamics are embedded in the controller and evaluated from on-line system identification. Experimental validation is undertaken using a flexible rotor/active magnetic bearing system. Mass loss tests were performed at two critical speeds corresponding to near sudden changes in unbalance that are capable of exciting rotor dynamic modes in a transient manner The controller is shown to suppress the transient responses within a finite settling time.

AB - A novel method for transient rotor/active magnetic bearing control using sampled wavelet coefficients is proposed. Control currents are formulated in the wavelet transform domain, prior to signal reconstruction. The wavelet based controller is designed from target transient responses due to step changes in wavelet coefficients of applied forces. Transient system dynamics are embedded in the controller and evaluated from on-line system identification. Experimental validation is undertaken using a flexible rotor/active magnetic bearing system. Mass loss tests were performed at two critical speeds corresponding to near sudden changes in unbalance that are capable of exciting rotor dynamic modes in a transient manner The controller is shown to suppress the transient responses within a finite settling time.

UR - http://dx.doi.org/10.1115/1.2436570

U2 - 10.1115/1.2436570

DO - 10.1115/1.2436570

M3 - Article

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EP - 555

JO - Journal of Engineering for Gas Turbines and Power: Transactions of the ASME

JF - Journal of Engineering for Gas Turbines and Power: Transactions of the ASME

SN - 0742-4795

IS - 2

T2 - ASME Turbo Expo 2006

Y2 - 1 May 2006

ER -

Transient rotor/active magnetic bearing control using sampled wavelet coefficients

Abstract

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PLATFORM GRANT: CENTRE FOR POWER TRANSMISSION AND MOTION CO NTROL

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