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Sensitivity of Force Specifications to the Errors in Measuring the Interface ForceForce-Limited Random Vibration Testing has been applied in the last several years at NASA/GSFC for various programs at the instrument and system level. Different techniques have been developed over the last few decades to estimate the dynamic forces that the test article under consideration will encounter in the operational environment. Some of these techniques are described in the handbook, NASA-HDBK-7004, and the monograph, NASA-RP-1403. A key element in the ability to perform force-limited testing is multi-component force gauges. This paper will show how some measurement and calibration errors in force gauges are compensated for w en tie force specification is calculated. The resulting notches in the acceleration spectrum, when a random vibration test is performed, are the same as the notches produced during an uncompensated test that has no measurement errors. The paper will also present the results of tests that were used to validate this compensation. Knowing that the force specification can compensate for some measurement errors allows tests to continue after force gauge failures or allows dummy gauges to be used in places that are inaccessible.
Document ID
20000013614
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Worth, Daniel
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: International Congress on Sound and Vibration
Location: Garmisch-Partenkirchen
Country: Germany
Start Date: July 4, 2000
End Date: July 7, 2000
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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