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Advanced optical position sensors for magnetically suspended wind tunnel modelsA major concern to aerodynamicists has been the corruption of wind tunnel test data by model support structures, such as stings or struts. A technique for magnetically suspending wind tunnel models was considered by Tournier and Laurenceau (1957) in order to overcome this problem. This technique is now implemented with the aid of a Large Magnetic Suspension and Balance System (LMSBS) and advanced position sensors for measuring model attitude and position within the test section. Two different optical position sensors are discussed, taking into account a device based on the use of linear CCD arrays, and a device utilizing area CID cameras. Current techniques in image processing have been employed to develop target tracking algorithms capable of subpixel resolution for the sensors. The algorithms are discussed in detail, and some preliminary test results are reported.
Document ID
19860053500
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lafleur, S.
(Vigyan Research Associates Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Instrumentation And Photography
Accession Number
86A38238
Funding Number(s)
CONTRACT_GRANT: NAS1-17979
Distribution Limits
Public
Copyright
Other

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