Title page for ETD etd-02132009-171416
|Type of Document
||Archibald, Charles Mark
||Experimental determination of the impulse response function for elastic vibrating systems
||Master of Science
|Wicks, Alfred L.
|Mitchell, Larry D.
|Pierce, Felix J.
|Date of Defense
An experimental method for determination and analysis of
the impulse response function of linear, elastic, vibrating
systems is developed. A deconvolution method is developed
for estimation of the impulse response function. The
estimator is shown to be unbiased in the presence of
measurement noise. Modal parameters are extracted from
impulse response estimates using a modification of the
Pisarenko harmonic decomposition method. The advantages of
a time-domain approach over traditional Fourier analysis
procedures, including avoidance of leakage and enhanced
statistical significance, are described. Several tests used
to determine the performance of the impulse response
estimator are described, and the results of these tests,
are presented. It is shown that the method can provide
accurate estimates of modal parameters even for short data
sets or high noise levels.
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