A rapid method for obtaining frequency-response functions for multiple input photogrammetric dataA two-digital-camera photogrammetric technique for measuring the motion of a vibrating spacecraft structure or wing surface and an applicable data-reduction algorithm are presented. The 3D frequency-response functions are obtained by coordinate transformation from averaged cross and autopower spectra derived from the 4D camera coordinates by Fourier transformation. Error sources are investigated analytically, and sample results are shown in graphs.
Document ID
19840048954
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kroen, M. L. (NASA Langley Research Center Hampton, VA, United States)
Tripp, J. S. (NASA Langley Research Center Instrument Research Div., Hampton, VA, United States)