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Owning Palette: Tachometer Processing VIs

Installed With: Sound and Vibration Measurement Suite

Removes trend from an analog tachometer signal. You can use the output of this VI as an input for the OAT Analog Tacho Process VI. The data type you wire to the analog tacho signal input determines the polymorphic instance to use.

Use the pull-down menu to select an instance of this VI.

Select an instance OAT Detrend Analog Tacho Signal (1 Tacho)OAT Detrend Analog Tacho Signal (N Tachos)

OAT Detrend Analog Tacho Signal (1 Tacho)

	extension specifies an extension method to lessen the jumps at the beginning and end of the data samples. 0 zero padding—Uses zeros to pad the input data. Watch for abrupt transitions between the padded zeros and the input data, which causes large artifacts near the transition. 1 symmetric ext.—(Default) Uses replications of the input data to pad the data, except that the VI left-flips the block at the input and right-flips the block at the end. 2 periodic ext.—Adds a replication of the input data block before and another replication after the input data block to pad the data. 3 1st derivative—Smooths the padding of order 1 4 2nd derivative—Smooths the padding of order 2
	analog tacho signal specifies the input analog tachometer signal.
	detrend level specifies how close the trend is to the original analog tacho signal. Set a detrend level value between 0 and 1. The default is 0.00. As the value of detrend level increases, the value of trend becomes closer to the value of analog tacho signal. When detrend level approaches 1, trend converges to the original analog tacho signal.
	analysis filters specifies lowpass and highpass analysis filter coefficients. The default filter settings are effective for filtering out unwanted low frequency trends in tachometer signals. lowpass specifies the lowpass filter coefficients. highpass specifies the highpass filter coefficients.
	synthesis filters specifies the lowpass and highpass synthesis filter coefficients that correspond to the coefficients found in analysis filters. The default settings are effective for filtering out unwanted low frequency trends in tachometer signals. lowpass specifies the lowpass filter coefficients. highpass specifies the highpass filter coefficients.
	error in describes error conditions that occur before this node runs. The default is no error. If an error occurred before this node runs, the node passes the error in value to error out. This node runs normally only if no error occurred before this node runs. If an error occurs while this node 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. status is TRUE (X) if an error occurred before this node ran or FALSE (checkmark) to indicate a warning or that no error occurred before this node ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the node that produced the error or warning. The default is an empty string.
	detrended analog tacho signal returns the well-conditioned analog tachometer signal with the trend removed.
	trend returns the trend in analog tacho signal.
	error out contains error information. If error in indicates that an error occurred before this node ran, error out contains the same error information. Otherwise, it describes the error status that this node produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the node that produced the error or warning.

OAT Detrend Analog Tacho Signal (N Tachos)

	extension specifies an extension method to lessen the jumps at the beginning and end of the data samples. 0 zero padding—Uses zeros to pad the input data. Watch for abrupt transitions between the padded zeros and the input data, which causes large artifacts near the transition. 1 symmetric ext.—(Default) Uses replications of the input data to pad the data, except that the VI left-flips the block at the input and right-flips the block at the end. 2 periodic ext.—Adds a replication of the input data block before and another replication after the input data block to pad the data. 3 1st derivative—Smooths the padding of order 1 4 2nd derivative—Smooths the padding of order 2
	analog tacho signals specifies the input analog tachometer signal for each channel.
	detrend level specifies how close the trend is to the original analog tacho signal. Set a detrend level value between 0 and 1. The default is 0.00. As the value of detrend level increases, the value of trend becomes closer to the value of analog tacho signal. When detrend level approaches 1, trend converges to the original analog tacho signal.
	analysis filters specifies lowpass and highpass analysis filter coefficients. The default filter settings are effective for filtering out unwanted low frequency trends in tachometer signals. lowpass specifies the lowpass filter coefficients. highpass specifies the highpass filter coefficients.
	synthesis filters specifies the lowpass and highpass synthesis filter coefficients that correspond to the coefficients found in analysis filters. The default settings are effective for filtering out unwanted low frequency trends in tachometer signals. lowpass specifies the lowpass filter coefficients. highpass specifies the highpass filter coefficients.
	error in describes error conditions that occur before this node runs. The default is no error. If an error occurred before this node runs, the node passes the error in value to error out. This node runs normally only if no error occurred before this node runs. If an error occurs while this node 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. status is TRUE (X) if an error occurred before this node ran or FALSE (checkmark) to indicate a warning or that no error occurred before this node ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the node that produced the error or warning. The default is an empty string.
	detrended analog tacho signals returns the well-conditioned analog tachometer signal with the trend removed for each channel.
	trends returns the trends in analog tacho signals for each channel.
	error out contains error information. If error in indicates that an error occurred before this node ran, error out contains the same error information. Otherwise, it describes the error status that this node produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the node that produced the error or warning.