Project Title:

Quick Look Modal Testing of Flexible Structures

04.14-2733
900163
Quick Look Modal Testing of Flexible Structures

Abstract:

An innovative modal test analysis technique for successful ground testing of large
precision space structures will be investigated. In particular, traditional approaches
to modal testing are hampered by the overwhelming amount of data which must be acquired,
stored and analyzed for these large flexible structures, which reflects directly
on testing costs and time. The application of data compression principles to modal
analysis is proposed as a method of providing a cost-effective, quick look at the
test data. This is accomplished by a combined automated zooming in on the band-widths
of interest, and efficient manipulation of the compressed information for the eventual
visualization of the modal data. The speed and accuracy of the proposed quick look
method will be compared to standard modal testing algorithm such as ERA, ITD and
the polyreference method.
This method is potentially faster than existing research and commercial packages
and would be applicable to all areas of modal testing (auto industry, spacecraft,
computer industry, etc.)
rule based data retrieval, data compression, mode shape