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A low cost imaging displacement measurement system for spacecraft thermal vacuum testing.

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dc.contributor.author Dempsey, Brian
dc.date.accessioned 2006-03-23T19:18:02Z
dc.date.available 2006-03-23T19:18:02Z
dc.date.issued 2006-01-09
dc.identifier 44th AIAA Aerospace Meeting and Exhibit, Reno, Nevada, January 9-12, 2006
dc.identifier.citation 44th AIAA Aerospace Meeting and Exhibit, Reno, Nevada, January 9-12, 2006 en
dc.identifier.clearanceno 06-0006
dc.identifier.uri http://hdl.handle.net/2014/38904
dc.description.abstract A low cost imaging displacement technique suitable for use in thermal vacuum testing was built and tested during thermal vacuum testing of the space infrared telescope facility (SIRTF, later renamed Spitzer infrared telescope facility). The problem was to measure the relative displacement of different portions of the spacecraft due to thermal expansion or contraction. Standard displacement measuring instrumentation could not be used because of the widely varying temperatures on the spacecraft and for fear of invalidating the thermal vacuum testing. The imaging system was conceived, designed, purchased, and installed in approximately 2 months at very low cost. The system performed beyond expectations proving that sub millimeter displacements could be measured from over 2 meters away. Using commercial optics it was possible to make displacement measurements down to 10 μm. An automated image processing tool was used to process the data, which not only speeded up data reduction, but showed that velocities and accelerations could also be measured. Details of the design and capabilities of the system are discussed along with the results of the test on the observatory. Several images from the actual test are presented. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 1594069 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003. en
dc.subject thermal vacuum testing en
dc.subject thermal vacuum en
dc.subject imaging displacement en
dc.title A low cost imaging displacement measurement system for spacecraft thermal vacuum testing. en
dc.type Preprint en


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