Research on Noise-Eliminating Method for Large Structure Vibration Signals Based on the Prony Algorithm

摘要

Based on the purpose of eliminating the background noise from the large structure vibration response signals which generated by hammer excitation, through analyzing the reason of background noise and the features of vibration signals, a noise eliminating method based on Prony algorithm is presented. Firstly, using the summation of a set of cosine attenuation signals to fit the original signal, compute the parameters of cosine attenuation signals, then identified the background noise and constructed its expression, and eliminated it at last. In this paper, through the processing of the simulation signals and practical signals by using the traditional Prony algorithm and improved Prony algorithm separately, the effectivity of the two algorithms are verified. And the comparison results of the two algorithms shows that the improved Prony algorithm is more effective.