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Smoothing Filter

The Smoothing Filter computed channel generates an output that is a smoothed representation of the input without generating any phase lead or lag.

NOTE
The Smoothing Filter can result in loss of data significance if not used properly. It is provided primarily for digital pulse counter inputs .In general, it should not be used for analog input channels with digital anti-aliasing filters.

ClosedScreenshot

ClosedGeneric parameters

  • Name: The computed channel name must be unique and contain valid characters (invalid characters are single and double quotes, '\', '@', '#', '&', '<', '>').
  • Collect: If checked, the channel data is written to the SIE data file during a test run.
  • Input channel: Select the desired input channel. In the edit dialog, the channel sample rate is displayed in Hz.

Specify the Filter Length as an odd number between 3 and 201 samples. The filter is a simple boxcar filter where each output sample is the linear average across the filter length.

For example, for a filter length of five, the filter averages the current sample, the two samples before, and the two samples after. Note that the channel backfills the initial output samples with the first fully filtered output value. For example, if the filter length is nine, the first four output samples are assigned the same value as the fifth output sample value.

Web Interface

Computed Channels