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Discussion of Modal Test Techniques as Applied to a Spacecraft Structure
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English
Abstract
Several modal test techniques were employed in the recently completed modal test of a meteorological spacecraft. The primary technique, which was required by the customer, was the classical multiple-shaker sine-dwell method. Although this method is quite time-proven, it takes considerable time to perform the test. Very good results were obtained from this method. The results are used as a basis for comparison with the results of state-of-the-art, less proven but more time efficient test methods.
The paper presents the results of the multiple-shaker sine-dwell test, and comparison is made with the results of both single-point random and multiple-point random tests. The paper concludes with a short discussion of the relative merits of each technique.
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Citation
Voorhees, C. and Clark, G., "Discussion of Modal Test Techniques as Applied to a Spacecraft Structure," SAE Technical Paper 841578, 1984, https://doi.org/10.4271/841578.Also In
References
- Voorhees C.R. Clark G.A. “Design, Construction and Performance of an Inertia-Mass Modal Test Facility” 2nd International Modal Analysis Conference Proceedings February 1984
- Chu F.H. Voorhees C.R. Metzger W.W. Wilding R.E. “Spacecraft Modal Testing Using Systematic Multi-Shaker Sine-Dwell Testing Techniques” Shock and Vibration Bulletin, Part 2 May 1981
- Allemang R.J. Brown D.L. “A Correlation Coefficient for Modal Vector Analysis” 1st International Modal Analysis Conference Proceedings November 1982