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747 Shuttle Carrier Aircraft/Space Shuttle Orbiter Mated Ground Vibration Test: Data via Transient Excitation and Fast Fourier Transform Analysis
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Sector:
Event:
Aerospace Meeting
Language:
English
Abstract
The experimental procedure employed to define the natural modes of vibration of the 747 Shuttle Carrier Aircraft and Space Shuttle Orbiter mated configuration is described. A discussion of test results and comparison to structural analysis results is also included.
Random transient signals were used as inputs to electromagnetic shakers to provide excitation to the mated vehicle test configuration. Acceleration signals were processed via the Fast Fourier Transform algorithm. Magnitude and phase transfer functions were formed and processed to produce modal frequencies, damping, and modal displacements.
Authors
Citation
Olsen, N. and Walter, M., "747 Shuttle Carrier Aircraft/Space Shuttle Orbiter Mated Ground Vibration Test: Data via Transient Excitation and Fast Fourier Transform Analysis," SAE Technical Paper 770970, 1977, https://doi.org/10.4271/770970.Also In
References
- Otnes K. Enochson L. “Digital Time Series Analysis.” 1972
- Rabiner L. R. Gold B. “Theory and Application of Digital Signal Processing.” Prentice Hall 1975
- Hewlett Packard 5451B Fourier Analyzer Operating Manual
- Hewlett Packard Digital to Analog Converter Model 54420 Operating Manual
- Hewlett Packard Modal Analysis II Operating Manual
- Long J. A. Walter M. J. “Summary of Ground Vibration Tests of the 747 SCA/Orbiter Mated Configuration.” Boeing Document D180-20446-1 April 1977