Transient rotor/active magnetic bearing control using sampled wavelet coefficients

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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)549-555
Number of pages7
JournalJournal of Engineering for Gas Turbines and Power: Transactions of the ASME
Volume129
Issue number2
DOIs
Publication statusPublished - 2007
EventASME Turbo Expo 2006 - Barcelona
Duration: 1 May 2006 → …

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