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Fiber optic strain gauge calibration and dynamic flexibility transfer function identification in magnetic bearings

Historical attempts to measure forces in magnetic bearings have been unsuccessful as a result of relatively high uncertainties. Recent advances in the strain-gauge technology have provided a new method for measuring magnetic bearing forces. Fiber optic strain gauges are roughly 100 times more sensitive than conventional strain gauges and are not affected by electro-magnetic interference. At the Texas A&M Turbomachinery Laboratory, installing the fiber-optic strain gauges in magnetic bearings has produced force measurements with low uncertainties. Dynamic flexibility transfer functions exhibiting noticeable gyroscopic coupling have been identified and compared with results of a finite element model. The comparison has verified the effectiveness of using magnetic bearings as calibrated exciters in rotordynamic testing. Many applications including opportunities for testing unexplained rotordynamic phenomena are now feasible.

Identiferoai:union.ndltd.org:TEXASAandM/oai:repository.tamu.edu:1969.1/152
Date30 September 2004
CreatorsZutavern, Zachary Scott
ContributorsChilds, Dara, Taylor, Henry, Palazzolo, Alan
PublisherTexas A&M University
Source SetsTexas A and M University
Languageen_US
Detected LanguageEnglish
TypeElectronic Thesis, text
Format1718298 bytes, 126754 bytes, electronic, application/pdf, text/plain, born digital

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