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Technical-Preview---Digital-Filter

于 2011-03-02 发布 文件大小:1776KB
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  In this article several methods for measurements of damping are summarized with respect to their advantages and disadvantages. Especially the use of Digital Filters (DF) and Fast Fourier Transform (FFT) are compared. In general FFT analysis is best suited for heavily damped structures although with proper memory and postprocessing facilities, lightly damped structures may also be covered, while it is advantageous to use DF analysis when dealing with lightly damped structures only. The use of Time-frequency analysis techniques such as the Wavelet Transform and the Short-time Fourier Transform is also demonstrated.

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