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Orbit and Timebase Express VI

Owning Palette: Order-Domain Measurements Express VIs

Installed With: Sound and Vibration Measurement Suite

Displays an orbit plot and a timebase plot with unfiltered or filtered data.

Dialog Box Options
Block Diagram Inputs
Block Diagram Outputs

Dialog Box Options

ParameterDescription
PairSpecifies the pair of channels for which to display the timebase plot and orbit plot. This option is available only when you set View to Timebase Plot or Orbit Plot.
Plot typeSpecifies to display the timebase plot and orbit plot for the unfiltered data or for the filtered data of one specific order. The default is Unfiltered. This option is available only when you set View to Timebase Plot or Orbit Plot.
ViewSpecifies whether to display the input time-domain signals, the timebase plot, or the orbit plot of the input signals.
  • Time Signals—Displays the input signals and the input speed profile.
  • Timebase Plot— Displays the timebase plot of the input signals.
  • Orbit Plot—(Default) Displays the orbit plot of the input signals.
SignalsDisplays the input signals for all channels. This option is available only when you set View to Time Signals.
  • Autoscale—Automatically adjusts the scales of the graph to display the data.
Speed profileDisplays the input rotational speed waveform. This option is available only when you set View to Time Signals.
  • Autoscale—Automatically adjusts the scales of the graph to display the data.
Timebase plotDisplays the timebase plot for all channels. This option is available only when you set View to Timebase.
  • Autoscale—Automatically adjusts the scales of the graph to display the data.
Orbit plotDisplays the orbit plot for all channels. This option is available only when you set View to Orbit.
  • Autoscale—Automatically adjusts the scales of the graph to display the data.
  • Cursor information—Displays the orbit value and properties of the current cursor position.
Input/OutputSpecifies the input and output settings.
  • Input Settings—Specifies the channel settings for the input signal.
    • Input signal—Specifies to compute the orbit plot and timebase plot for N channels. This step supports only an even number of channels.
    • Speed profile—Specifies the rotational speed waveform. This option is available only with the NI Sound and Vibration Assistant.
  • Output Settings—Contains the following options:
    • Export orbit plot—Specifies whether to export the orbit plot of the input signals. The default is TRUE.
    • Export timebase plot—Specifies whether to export the timebase plot of the input signals. The default is TRUE.
Channel PropertyContains the following options:
  • Number of channels—Specifies the number of channels for which you want to display the timebase plot and orbit plot. This option is available only with the Express VI. The Sound and Vibration Assistant automatically detects the number of channels for you.
  • Channel properties—Specifies properties of each channel.
    • Channel Name—Specifies the name of each channel.
    • Probe Angle (deg)—Specifies the probe angle value, in degrees, of each channel.
    • Pair—Specifies the pair number of each channel.
ConfigurationSpecifies the display selection and limit range.
  • Display Selection—Contains the following options:
    • Unfiltered plot—Specifies whether to display the timebase plot and orbit plot for unfiltered data. The default is TRUE.
    • Orders to display—Specifies the orders for which you want to display the timebase plot and orbit plot.
    • Bandwidth (order)—Specifies an order span centered at the order that you specify in Orders to display. Specify a Bandwidth (order) value between 0.01 and 1. If Bandwidth (order) is less than 0.01, this step sets Bandwidth (order) to 0.01. If Bandwidth (order) is greater than 1, this step sets Bandwidth (order) to 1. The default is 1.
    • Samples/rev wanted—Specifies the number of samples to display in one revolution. The default is 64.
  • Limit Range—Specifies a start and end value for the revolution value at which to display the timebase plot and orbit plot.
    • Start (rev)—Specifies the start revolution value at which to display the timebase plot and orbit plot. The default is 0. The value of Start (rev) must be less than the value of End (rev).
    • End (rev)—Specifies the end revolution value at which to display the timebase plot and orbit plot. The default is Inf, which means to display the timebase plot and orbit plot from the start revolution value to the end of the signal.

Block Diagram Inputs

ParameterDescription
input signalsSpecifies the input signals.
speed profileSpecifies the rotational speed waveform.
error inDescribes error conditions that occur before this Express VI runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
resetSpecifies the initialization of the internal state of the VI. The default is FALSE.

Block Diagram Outputs

ParameterDescription
timebase plotReturns the timebase plot.
orbit plotReturns the orbit plot.
end reachedIndicates whether the input signals reaches the end time or speed value that you specified in the Limit Range.
error outContains error information. This output provides standard error out functionality.

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