Type of Document	Master's Thesis
Author	Archibald, Charles Mark
URN	etd-02132009-171416
Title	Experimental determination of the impulse response function for elastic vibrating systems
Degree	Master of Science
Department	Mechanical Engineering
Advisory Committee	Advisor Name Title Wicks, Alfred L. Committee Chair Mitchell, Larry D. Committee Member Pierce, Felix J. Committee Member
Keywords	Vibration
Date of Defense	1990-05-06
Availability	restricted
Abstract 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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