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An automatic data system for vibration modal tuning and evaluationA digitally based automatic modal tuning and analysis system developed to provide an operational capability beginning at 0.1 hertz is described. The elements of the system, which provides unique control features, maximum operator visibility, and rapid data reduction and documentation, are briefly described; and the operational flow is discussed to illustrate the full range of capabilities and the flexibility of application. The successful application of the system to a modal survey of the Skylab payload is described. Information about the Skylab test article, coincident-quadrature analysis of modal response data, orthogonality, and damping calculations is included in the appendixes. Recommendations for future application of the system are also made.
Document ID
19750013271
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Salyer, R. A. (TRW Systems Group Redondo Beach, Calif., United States)
Jung, E. J., Jr. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Huggins, S. L. (Northrop, Inc., Houston Texas, United States)
Stephens, B. L. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1975
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
JSC-S-435
NASA-TN-D-7945
Accession Number
75N21343
Funding Number(s)
PROJECT: RTOP 961-21-31-05-72
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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