Biswa

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 the vibrator. I am using invfreqz for getting the filter coefficients in matlab. How can I design an arbitrary filter in labview with filter coefficients exported from matlab ? Best, BSG

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 the vibrator. I am using invfreqz for getting the filter coefficients in matlab. How can I design an arbitrary filter in labview with filter coefficients exported from matlab ? Best, BSG

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 the vibrator. I am using invfreqz for getting the filter coefficients in matlab. How can I design an arbitrary filter in labview with filter coefficients exported from matlab ? Best, BSG

Hi there, I have modified the MultiFunction-Sync-In-Out to accept 4 analog ins and 1 analog out but as you can see I always get Error -200288. I have attached the vi along with this message. If one runs Labview in debug mode than anther error 200279 is also visible at the error out port of the Analog Read VI. If this problem is solved, I would like to output a second analog channel with a pulse to mark signal out from the first analog out. Please advise. Cheers, Biswa