ME345_Lecture_19

# ME345_Lecture_19 - frequency of 100 Hz for a total sampling...

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M E 345 Spring 2008 Professor John M. Cimbala Lecture 19 02/27/2008 Today, we will : Discuss an additional item not in the pdf notes: Analogy between Fourier series and FFTs Do an example problem – FFT with windowing Review the pdf module: How to Analyze the Frequency Content of a Signal Do some example problems – analyzing the frequency content of a signal

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Example Given : Voltage data are acquired with a digital data acquisition system at a sampling
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Unformatted text preview: frequency of 100 Hz for a total sampling time of 3 s. [See Excel data on course website.] To do : Calculate the following: o Number of useful data points for calculation of a frequency spectrum o The folding frequency of the spectrum o The frequency resolution of the spectrum o Generate a frequency spectrum, using the Hanning window o Summarize the voltage signal – i.e., DC offset, frequency component(s), and their amplitudes Solution :...
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ME345_Lecture_19 - frequency of 100 Hz for a total sampling...

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