SI Get Noise Covariance from System Model VI

System Identification VIs

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SI Get Noise Covariance from System Model VI

Owning Palette: Model Management VIs

Installed With: System Identification Toolkit

Obtains noise variance and noise covariance from a system model. Use the SI Set Noise Covariance to System Model VI to apply noise variance and noise covariance to a system model.

Example

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system model contains information about the model structure, nominal or estimated parameters, identification result, and so on.
error in describes error conditions that occur before this VI or function 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. This VI or function runs normally only if no error occurred before this VI or function runs. 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.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function 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 VI or function that produced the error or warning. The default is an empty string.
noise variance returns the variance of the disturbance for a SISO or MISO system. noise variance returns –1 if system model contains a MIMO system.
noise covariance returns the covariance of the disturbances for a MIMO system.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function 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 VI or function that produced the error or warning.

Example

Refer to the Read Information from Model VI in the labview\examples\System Identification\Getting Started\General.llb for an example of using the SI Get Noise Covariance from System Model VI.

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