Modal test - Measurement and analysis requirementsData from the Viking Orbiter Modal Test Program are used to illustrate modal test measurement and analysis requirements. The test was performed using a multiple shake dwell technique where data were acquired one channel at a time and recorded on paper tape. Up to ten shakers were used simultaneously, with a complete set of data consisting of 290 strain-gage readings and 125 accelerometer readings. The data analysis provided information sufficient to minimize errors in the data. The list of analyses in order of value is orthogonality, residual mass, frequency sweep, data checks to assure good test data, multilevel trends, global kinetic energy, and global strain energy.
Document ID
19760039332
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wada, B. K. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1975
Subject Category
Ground Support Systems And Facilities (Space)
Report/Patent Number
SAE PAPER 751066
Meeting Information
Meeting: National Aerospace Engineering and Manufacturing Meeting