Actions for Dynamic Deformation Measurements of an Aeroelastic Semispan Model

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Dynamic Deformation Measurements of an Aeroelastic Semispan Model

Author
Burner, Alpheus W.
Published
[2001].
Physical Description
1 electronic document
Additional Creators
Graves, Sharon S., Schuster, David M., and Edwards, John W.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
The techniques used to acquire, reduce, and analyze dynamic deformation measurements of an aeroelastic semispan wind tunnel model are presented. Single-camera, single-view video photogrammetry (also referred to as videogrammetric model deformation, or VMD) was used to determine dynamic aeroelastic deformation of the semispan 'Models for Aeroelastic Validation Research Involving Computation' (MAVRIC) model in the Transonic Dynamics Tunnel at the NASA Langley Research Center. Dynamic deformation was determined from optical retroreflective tape targets at five semispan locations located on the wing from the root to the tip. Digitized video images from a charge coupled device (CCD) camera were recorded and processed to automatically determine target image plane locations that were then corrected for sensor, lens, and frame grabber spatial errors. Videogrammetric dynamic data were acquired at a 60-Hz rate for time records of up to 6 seconds during portions of this flutter/Limit Cycle Oscillation (LCO) test at Mach numbers from 0.3 to 0.96. Spectral analysis of the deformation data is used to identify dominant frequencies in the wing motion. The dynamic data will be used to separate aerodynamic and structural effects and to provide time history deflection data for Computational Aeroelasticity code evaluation and validation.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20010086237.
AIAA Paper 2001-2454.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
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