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From: Truan Willis on 3 May 2010 14:05
Hi

I would like to plot the logarithmic decrement of a structures transient vibration response signal so I can calculate its damping ratio.

I can do it manual by simply looking through the data to identify the positive or negative amplitude peaks of the signal. However I have been unable to create an automated m-function to speed up the process.

I've had a look through some of the peak finder functions that have been created but have been unable to apply them to my problem.

Can anyone shed any light on how I might go about formulating an m-function to achieve this?

Any help would be great

Thanks

Truan
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Prev: lsqcurvefit, jacobian
Next: Cross correlation to find time lag by employing chirp signal