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Nonlinear effects of a modal domain optical fiber sensor in a vibration suppression control loop for a flexible structureRecently, a modal domain optical fiber sensor has been demonstrated as a sensor in a control system for vibration suppression of a flexible cantilevered beam. This sensor responds to strain through a mechanical attachment to the structure. Because this sensor is of the interferometric type, the output of the sensor has a sinusoidal nonlinearity. For small levels of strain, the sensor can be operated in its linear region. For large levels of strain, the detection electronics can be configured to count fringes. In both of these configurations, the sensor nonlinearity imposes some restrictions on the performance of the control system. In this paper we investigate the effects of these sensor nonlinearities on the control system, and identify the region of linear operation in terms of the optical fiber sensor parameters.
Document ID
19930043328
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lindner, D. K.
(NASA Langley Research Center Hampton, VA, United States)
Zvonar, G. A.
(NASA Langley Research Center Hampton, VA, United States)
Baumann, W. T.
(NASA Langley Research Center Hampton, VA, United States)
Delos, P. L.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: ASME, Transactions, Journal of Vibration and Acoustics
Volume: 115
Issue: 1
ISSN: 0739-3717
Subject Category
Instrumentation And Photography
Accession Number
93A27325
Funding Number(s)
CONTRACT_GRANT: NAG1-1006
CONTRACT_GRANT: NAG1-1043
CONTRACT_GRANT: N00014-89-J-3123
Distribution Limits
Public
Copyright
Other

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