ISE 370: Industrial Automation



ISE 370_Fall2014 Industrial Automation

LabVIEW Problems

1) Create an one dimensional array of 175 random numbers 225 Signal Analysis sub-palette to create an output signal. (See the Configure Simulate Signals dialog box on back). This VI is a powerful computational method that can used to perform a spectral analysis on discrete sampled data such as that from a DAQ system.

ISE 370_Fall2014 Industrial Automation

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Place the Spectral Measurements Express VI, located on the Functions>>Signal Analysis sub-palette on the BD. The VI computes the power spectrum of a signal.

The Configure dialog box for this VI contains:

Power Spectrum under type of Measurement.

Result >> Linear

Window >> Hanning

Place the “Unbundle by Name” function & “Or” function on the BD. This returns the error status Boolean value if an error occurs to stop the While loop.

Your Power Spectrum display is a Waveform graph.

Your Sine display is a chart.

Note: Windowing is used to reduce the amplitude of the discontinuities at the boundaries of each period.

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