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Rainflow

The Rainflow DataMode stores multiple channels of rainflow cycle histograms in the output data file. The CX23-R acquires peaks and valleys from triggered or un-triggered time history data streams using the user-specified hysteresis value and the peak valley processing algorithm. The resulting peak valley stream runs through the rainflow cycle counting algorithm to yield the set of closed cycles. The closed cycles are histogrammed using the user-defined options for the type and size of histogram.

ClosedScreenshot

ClosedGeneric parameters

  • Name: Each DataMode must have a unique name and contain valid characters (invalid characters are single and double quotes, '\', '@', '#', '&', '<', '>').
  • Description: Optional detailed description of the DataMode.
  • Trigger mode: Select one of four available triggering options. Use triggering to eliminate undesired segments of the input data stream before it is processed by the DataMode.
    •  Always on: Do not use triggering. Data sampling is always on from the start of the test.
    •  Trigger: Data sampling starts when the trigger channel becomes TRUE and runs until the end of the data stream.
    •  Gate: Data sampling occurs if and only if the trigger channel is TRUE.
    •  One shot: Take a single data sample when the trigger channel transitions from FALSE to TRUE or if the trigger channel is TRUE on the first sample of any run.
  • Trigger channel: Specify the trigger input when using a trigger option other than Always on. The trigger channel must have the same sample rate as the input channels.
  • Channel select: From the channels list, select the desired input channels for the DataMode and click the appropriate arrow. Alternatively, drag and drop the desired channels to the appropriate list.