CD Construct StateSpace Model VI
Owning Palette: Model Construction VIs
Installed With: Control Design and Simulation Module
Creates a deterministic statespace representation of a system using the matrices A, B, C, and D, and the Sampling Time (s) You must manually select the polymorphic instance to use.
This VI constructs a deterministic statespace model. You can use the CD Construct Stochastic Model VI to construct a stochastic statespace model.
Note This VI supports specific combinations of the system matrices A, B, C, and D. Refer to Required Matrices input of the CD Verify MIMO Properties VI for a complete list of the combinations. 
Use the pulldown menu to select an instance of this VI.
Place on the block diagram  Find on the Functions palette 
CD Construct StateSpace Model (Numeric)
Sampling Time (s) defines whether the model represents a continuoustime system or a discretetime system. If the model represents a continuoustime system, Sampling Time (s) must equal zero. If the model represents a discretetime system, Sampling Time (s) must be greater than zero and equal to the sampling rate, in seconds, of the discrete system. The default is 0.
 
A specifies the system matrix that describes the dynamics of the states of the system.  
B specifies the input matrix that relates the inputs to the states.  
C specifies the output matrix that relates the outputs to the states.  
D specifies the transmission matrix that relates the inputs to the outputs.  
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.
 
StateSpace Model returns the created numeric model. The data consists of the arrays A, B, C, and D. 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.
Rightclick the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.

CD Construct StateSpace Model (Symbolic)
Sampling Time (s) defines whether the model represents a continuoustime system or a discretetime system. If the model represents a continuoustime system, Sampling Time (s) must equal zero. If the model represents a discretetime system, Sampling Time (s) must be greater than zero and equal to the sampling rate, in seconds, of the discrete system. The default is 0.
 
Symbolic A is the symbolic representation of the system matrix that describes the dynamics of the states of the system.  
Symbolic B is the symbolic representation of the input matrix of the system that relates the inputs to the states.  
Symbolic C is the symbolic representation of the output matrix that relates the outputs to the states.  
Symbolic D is the symbolic representation of the transmission matrix that relates the inputs to the outputs.  
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.
 
Variables contains the name and value of each variable.
 
StateSpace Model returns the created model. The data consists of the arrays Symbolic A, Symbolic B, Symbolic C, and Symbolic D in which this VI evaluates string elements using data of the Variables array. 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.
Rightclick the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.

CD Construct StateSpace Model Details
This VI does not support delays directly. To add a delay to the model, use the CD Set Delays to Model VI. Refer to the LabVIEW Control Design User Manual for more information about delays.