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Publication Details
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| Citation: | Russell Morrison Senior Product Specialist Geodetic Systems Inc. |
Abstract
This paper describes the dynamic 3D measurement of deployable gossamer antenna structures under zero gravity conditions. The measurement was achieved using multiple synchronized cameras to image targets that were adhered to the antenna surface. To obtain measurements of the antenna surface without distortion induced by gravity, the test articles and the measurement system were attached to a custom fixture and loaded onboard a modified Dassault Falcon 20 jet aircraft where a series of back-to-back parabolic arc maneuvers were performed. During each parabolic arc the approximately 25 seconds of zero gravity is experienced on board the aircraft. At that time three synchronized cameras were triggered and 3D coordinate measurements of more than 400 points were obtained at rate of approximately 5hz. The project presented many coordinate metrology challenges and several environmental challenges. Each of these challenges are discussed. The results provided 3D data of the primary surface that was used for CAD shape comparison and subsequent antenna performance analysis.
