CD Model Order Reduction VI

Control Design VI and Function

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CD Model Order Reduction VI

Owning Palette: Model Reduction VIs

Installed With: Control Design and Simulation Module

Eliminates state dynamics that you want to ignore in the State-Space Model. This VI can eliminate the state dynamics by deleting the states or by assuming steady state conditions for states with fast dynamics, also known as pseudo-steady-state assumption. The pseudo steady state assumption does not affect the discrete and continuous system gain of the original system, that is, the remaining states will have the same gain as when considering the full order system.

Details  

 Place on the block diagram  Find on the Functions palette
State-Space Model contains a mathematical representation of and information about the system of which this VI reduces the states.
States lists the index number of the states you want to eliminate. The index is zero-based.
Procedure determines how to eliminate the states.

0Match Gain (default)—The VI considers the states, which you want to eliminate, to be in a steady state. This VI substitutes the steady state values of the removed states into the dynamics of the reduced order system.
1Simple Detection—The VI removes the states from the system model.
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 exception control to treat what is normally an error as no error or to treat a warning as an error. 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.
Reduced Model is the resulting reduced State-Space Model. To access and modify the data in the model, use the Model Information VIs.
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.

CD Model Order Reduction Details

This VI supports delays. Refer to the LabVIEW Control Design User Manual for more information about delays.

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