FRF in matlab using an accelerometer and a hammer?

04 February 2019 1 7K Report

I am willing to calculate the damping of a cantilever beam by using the Half-power bandwidth method. For that, I need to calculate the FRF where I plot m.s2/N against Hz. I have both the accelerometer signal plus the hammer signal. Does anyone know where can I find the code for matlab where I can obtain this plot?

Thank you very much.

Giuseppe Pennisi

Hello Ana,

You can look into the tfestimate Matlab function. Alternatively, if you wanted to write you own code, you can have good results by simply calculating the FFTs of the two signals X(omega) and Y(omega), and then the transfer function TF = abs(Y/X).

Hope this helps.

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