I have conducted an experiment in which the impulse was exerted on sound bowl (it was hit by a hammer). As a result I have obtained acceleration from accelerometer on 3 axis, calculated net acceleration ( sqrt(x^2+y^2+z^2) ) and tried to obtain frequency components of the response. What I need to do is to identify input impulse but I have no idea on how to do that and I'm kind of walking blindly. I would appreciate any ideas/references.
Accelerometer gives system response. I think you need input signal( excitation source ) or hammer signal. To measure system response you should connect hammer cable to the FFT device. Actually you measure a transfer function. As you know transfer function is output/input. you may get input from transfer function itself. The following link may help you:
http://www2.me.rochester.edu/courses/ME443/Assignments/VibrationTesting.pdf
Mr M . Buszta: In classical mechanics, impulse (symbolized by J or Imp) is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector in the same direction. ... A resultant force causes acceleration and a change in the velocity of the body for as long as it acts. An elementary insightful reference is:
https://www.physicstutorials.org/pt/42-Impulse
A useful link: https://www.sciencedirect.com/topics/engineering/impulse-force
I hope this helps. Should there be any further posers don't hesitate to post. Regards--
Hi Marcin Buszta. Mass of the hammer times the acceleration will give you force. The area under the acceleration time plot will give you the impulse. Hope this helps.
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