Fourier
Problem
Problem
Freq4P03
Name_______________________________________
Dr. Abner Mallity needs your help with a data analysis problem. He
has some data taken with strain gages attached to a small flat steel beam.
When the end of the beam is deflected and released it "twangs" (emits
a strange twanging sound). He has recorded that transient and stored
the data in a file. You can access that data by clicking
here.
Dr. Mallity wants to call on your expertise with Matlab and your ability
to use the fft algorithm. So, do the following.
-
Import the data into a
Matlab workspace.
-
You may need to copy the
data from the web page and paste it into Notepad, etc. so that you can
save it as a text file.
-
You might be able to right
mouse-click on the page to get it in a separate window, then save it as
a plain text file.
-
Plot the data vs time
so that you can see the signal.
-
Using the fft function,
determine the resonant frequency of the bar.
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Note that the time data
is in milliseconds.