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Owning Palette: Order-Domain Measurements Express VIs

Installed With: Sound and Vibration Measurement Suite

Displays the Bode plot and polar plot of designated orders and the overall level of an input signal for a single channel or for N channels.

Dialog Box Options

Block Diagram Inputs

Block Diagram Outputs

Dialog Box Options

Parameter	Description
Channel selection	Specifies the channel for which to display the magnitude and phase. This option is available only when you set the Input signal to N Channels.
View	Specifies whether to display the input time-domain signals, the Bode plot, the overall level, or the polar plot of the input signals. Time Signals—Displays the input signals and the input speed profile. Bode Plot—(Default) Displays the Bode plot of the input signals. Overall Levels—Displays the overall levels of the input signals. Polar Plot—Displays the polar plot of the input signals.
Signals	Displays the input signal for the channel you specify. 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 profile	Displays 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.
Magnitudes	Displays the magnitudes of the specified orders. This option is available only when you set View to Bode Plot. Autoscale—Automatically adjusts the scales of the graph to display the data.
Phases	Displays the phases of the specified orders. This option is available only when you set View to Bode Plot. Autoscale—Automatically adjusts the scales of the graph to display the data.
Overall levels	Displays the overall level of the input signals. This option is available only when you set View to Overall Levels. Autoscale—Automatically adjusts the scales of the graph to display the data.
Polar plot	Displays the polar plot of the specified orders. This option is available only when you set View to Polar Plot. Autoscale—Automatically adjusts the scales of the graph to display the data. Channel selection—Specifies the channel for which to display the polar plot. This option is available only when you set the Input signal to N channels. Order selection—Specifies the order for which to display the polar plot. Cursor information—Displays the magnitude, phase and reference information of the current cursor position.
Input/Output	Specifies the input and output settings. Input Settings—Specifies the channel settings for the input signal. Input signal—Specifies whether this step computes the magnitude, phase, overall level, and polar plot for a single channel or for N channels. The default is 1 Channel. 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 Bode—Specifies whether to export the Bode plot of the input signals. The default is TRUE. Export overall level—Specifies whether to export the overall level of the input signals. The default is FALSE. Export polar plot—Specifies whether to export the polar plot of the input signals. The default is TRUE.
Configuration	Contains the following options: Orders to track—Specifies the orders for which you want to display the Bode plot and polar plot. X-axis selection—Specifies the type of scale to use for the x-axis of the Magnitudes, Phases, and Overall levels plots. Time Speed (Default) Revolution Bandwidth (order)—Specifies an order span centered at the order that you specify in Orders to track. 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. Run type—Specifies whether this data represents a Run-up (Default) or Run-down test. This parameter is available only if you select Speed from the X-axis selection pull-down menu.If you select Run-up, this step performs order analysis only when the measured speed increases. If you select Run-down, this step performs order analysis only when the measured speed decreases.If you place a checkmark in the Limit range checkbox, the Run type parameter has a higher priority than the Start speed (RPM) and End speed (RPM) parameters. For example, if you set Run type to Run-up and Start speed (RPM) is greater than End speed (RPM), the NI Sound and Vibration Assistant switches the numeric values such that Start speed (RPM) is less than End speed (RPM). Speed interval (RPM)—Specifies the speed interval between two consecutive order magnitude, phase, or overall level results. Speed interval (RPM) is available only when you set X-axis selection to Speed. The minimum value of Speed interval (RPM) is 1. The default is 50.00. Time interval (s)—Specifies the time interval between two consecutive order magnitude, phase, or overall level results. Time interval (s) is available only when you set X-axis selection to Time. The minimum value of Time interval (s) is 0.001. The default is 0.1. Limit range—Specifies whether to set a start and end value for the time or rotational speed at which to compute the magnitude, phase, or overall level. Limit range is available when you set X-axis selection to Time or Speed. The default is FALSE. Note  If the values you specify for the Start speed (RPM) and End speed (RPM) parameters do not match the setting of the Run type parameter, the Sound and Vibration Assistant switches the numeric values to match the Run type parameter. Start time (s)—Specifies the start time at which to compute the magnitude, phase, or overall level. Start time (s) is available only when you set X-axis selection to Time. The default is 0. The value of Start time (s) must be less than the value of End time (s). End time (s)—Specifies the end time at which to compute the magnitude, phase, or overall level. End time (s) is available only when you set X-axis selection to Time. The default is Inf, which means this step computes the magnitude, phase, or overall level from the start time to the end of the signal. The value of End time (s) must be greater than the value of Start time (s). Start speed (RPM)—Specifies the start rotational speed at which to compute the magnitude, phase, or overall level. Start speed (RPM) is available only when you set X-axis selection to Speed. The default is 0. End speed (RPM)—Specifies the end rotational speed at which to compute the magnitude, phase, or overall level. End speed (RPM) is available only when you set X-axis selection to Speed. The default is Inf, which means this step computes the magnitude, phase, or overall level from the start rotational speed to the end of the signal.
View Settings	Specifies how to display the Magnitudes, Phases, Overall levels, and Polar Plot plots. Magnitude View—Contains the following options: Magnitude scale—Specifies whether to display the magnitude linearly or in decibels. The default is Linear. Peak conversion—Specifies the peak scaling of the converted spectrum. You can select RMS (default), Peak, or Peak to Peak. Phase View—Contains the following options: Phase unit—Specifies whether to display the phase in units of Degree or Radian. The default is Degree. Unwrap phase—Specifies whether to unwrap the phase. If Unwrap phase is FALSE, this step wraps the phase between 0 and 360 degrees, or between 0 and 2 pi. If Unwrap phase is TRUE, this step removes discontinuities from the phase and does not restrict the phase to values between 0 and 360 degrees. The default is TRUE. Level View—Contains the following option: Level scale—Specifies whether to return the overall level linearly or in decibels. The default is Linear.
Channel Settings	Specifies the setting of the probe angle position for each channel.

Block Diagram Inputs

Parameter	Description
input signal	Specifies the input signal.
speed profile	Specifies the rotational speed waveform.
error in	Describes 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.
reset	Specifies the initialization of the internal state of the VI. The default is FALSE.

Block Diagram Outputs

Parameter	Description
magnitudes	Returns the magnitudes of the orders you specify in Orders to track.
phases	Returns the phases of the orders you specify in Orders to track.
levels	Returns the overall level of the input signal.
polar plots	Returns the polar plots of the orders you specify in Orders to track.
units	Returns the units of the magnitudes, phases, and levels.
end reached	Indicates whether the input signal reaches the end time or speed value that you specified in the Limit range.
error out	Contains error information. This output provides standard error out functionality.
level position info	Returns the position information of the levels. The position information includes the locations, in seconds, of the samples and the number of samples per revolution.
mag/phase position info	Returns the position information of the magnitudes and phases. The position information includes the locations, in seconds, of the samples and the number of samples per revolution.
magnitude info	Returns the properties of the magnitudes.