Hi there, I am measuring the output of a mechanical manipulator in response to band limited gaussian white noise. This then allows me to calculate the transfer function using - cross-power spectral density of the stimulus and the response divided by the auto-PSD of the stimulus. I have been able to achieve this in matlab. Now, I want to nullify the effect of the manipulator using a inverse filter with 1/transfer function of the manipulator. This will ensure that the noise that I inject in the manipulator passes faithfully without imposing the transfer function of vibrator. Please advise how could I achieve this in matlab. Shall I use invfreqz to get the a and b coefficients and then filter my input data using this or is there some other way? Start a New Thread