trying to integrate an acceleration and display the displacement both in frequency domain.

[Alv]

I'm bring in acceleration data from accelerometer and wanting to display the displacment data (frequency domain) at the same time. I have SVT toolset and tried using the AVD (freq).VI but the FFT signal input from the power spectrum vi is in dB hence i'm assuming my displacement is in dB (re ??). I want to display the displacemnt (Mils (inches) vs frequency). any ideas? I assumed this AVD Vi performed this function. Need help.

[dsb@NI]

The SVT Integration (frequency) VI performs the integration and maintains the view (e.g. dB On) of the power spectrum. You can use the SVT Units Conversion VI to convert a spectrum from dB scale to linear scale. If you want both spectra displayed on a linear scale, you can set the dB On control on the SVT Power Spectrum to FALSE, and you would not need to use the SVT Units Conversion VI after the integration.

The attached VI shows how to display the acceleration power spectrum in dB and the displacement magnitude spectrum on a linear scale using VIs from the Sound and Vibration Toolkit.

Hope this helps,
Doug

[Alv]

Doug,
Using the unit conversion vi worked great. Thanks for the your help.

[Don Zoellner]

Doug,
I downloaded your VI to check it out because it always takes me several cuts at this problem to get the chart headers, scales and everything else in sync and working and the block diagram end result is typically less than elegant. However when it was loading it asked for two files that I have either blown away or they were not part of my original Sound and Vibration Toolset, "SVL Integration (Frequency) (1ch).vi" and "SVL Unit Conversion (1ch).vi". I have the SVT VI's, but no cigar on the SVL's. Is there a simple way to get these files wihtout the whole unload & reload of the S&V toolset?
Thanks,
Don

[dsb@NI]

Replace the SVL VIs that you did not have with the SVT VIs found in the Frequency Analysis>>Extended Measurements palette.

Good luck,
Doug