CD Convert Discrete to Discrete VI

Control Design VI and Function

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CD Convert Discrete to Discrete VI

Owning Palette: Model Conversion VIs

Installed With: Control Design and Simulation Module

Changes the sampling time of a discrete-time system model. The data type you wire to the Discrete State-Space Model input determines the polymorphic instance to use.

Details  

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

 Place on the block diagram  Find on the Functions palette

CD Convert Discrete to Discrete (State-Space)

Prewarp Frequency (rad/s) is the frequency that this VI uses to produce a Tustin (bilinear) transformation with pre-warping. This VI only uses Prewarp Frequency (rad/s) when the Method is Prewarp.
Discrete State-Space Model is the discrete-time system model that this VI resamples with the new sampling time.
Resampling Time (s) is the time this VI uses to resample the input discrete-time model. The default is 1.
Method determines the conversion type this VI uses from discrete to continuous and continuous to discrete when resampling.

0Zero-Order-Hold (default)
1Tustin (Bilinear)
2Prewarp
3Forward
4Backward
5Z-Transform
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.
Resampled State-Space Model is the modified discrete-time system model with the new sampling time. 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 Convert Discrete to Discrete (Transfer Function)

Prewarp Frequency (rad/s) is the frequency that this VI uses to produce a Tustin (bilinear) transformation with pre-warping. This VI only uses Prewarp Frequency (rad/s) when the Method is Prewarp.
Discrete Transfer Function Model is the discrete-time system model that this VI resamples with the new sampling time.
Resampling Time (s) is the time this VI uses to resample the input discrete-time model. The default is 1.
Method determines the conversion type this VI uses from discrete to continuous and continuous to discrete when resampling.

0Zero-Order-Hold (default)
1Tustin (Bilinear)
2Prewarp
3Forward
4Backward
5Z-Transform
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.
Resampled Transfer Function Model is the modified discrete-time system model with the new sampling time. 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 Convert Discrete to Discrete (Zero-Pole-Gain)

Prewarp Frequency (rad/s) is the frequency that this VI uses to produce a Tustin (bilinear) transformation with pre-warping. This VI only uses Prewarp Frequency (rad/s) when the Method is Prewarp.
Discrete Zero-Pole-Gain Model is the discrete-time system model that this VI resamples with the new sampling time.
Resampling Time (s) is the time this VI uses to resample the input discrete-time model. The default is 1.
Method determines the conversion type this VI uses from discrete to continuous and continuous to discrete when resampling.

0Zero-Order-Hold (default)
1Tustin (Bilinear)
2Prewarp
3Forward
4Backward
5Z-Transform
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.
Resampled Zero-Pole-Gain Model is the modified discrete-time system model with the new sampling time. 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 Convert Discrete to Discrete Details

This VI supports time delays. In the conversion process, if the results of the delay conversion contain residues, this VI ignores the residues and gives a warning. Refer to the LabVIEW Control Design User Manual for more information about delays.

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