![]() The results of the frequency response measurement can be displayed on a Bode plot or a Nyquist plot. The data from each channel is scaled to engineering units, windowed, and the frequency response is computed. Triggering from either channel is supported. No source is provided from the DAQ board, as you will be providing one from the impulse hammer. This VI continuously acquires data from two channels in the same device. I would recommend using Baseband Frequency Response (DAQmx - No excitation).vi, located at:Ĭ:\Program Files\National Instruments\LabVIEW 7.1\examples\Sound and Vibration\Frequency Analysis\Dual Channel Analysis\SVXMPL_Baseband FRF (DAQmx - no excitation).vi ![]() The frequency response functions (FRFs) included with the Sound and Vibration Toolkit are the methods you'll use to find the natural frequency of the DUT. Cable the output of the impulse hammer to analog input 0 and the output of the accelerometer connected to your device under test (DUT) to analog input 1.
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