Type Conversion

NI MAX Control Design Steps

Type Conversion

Converts a system model into a transfer function, pole-zero, or state-space model.

Parameter	Description
Resulting Model	Displays the mathematical expression that defines the model you create. If you select a state-space model, Resulting Model displays the matrices of the state-space model.
Data Input	Contains the following option: Model—Specifies the system model whose representation you want to change.
Configuration	Contains the following options: Model Type Conversion—Specifies the type of model to which you want to change the representation. Contains the following options: State-Space—Converts a transfer function or zero-pole-gain model to a state-space model. You can specify a full or minimum realization using the Realization type option. Transfer Function—Converts a state-space or zero-pole-gain model to a transfer function model. Zero-Pole-Gain—Converts a state-space or transfer function model to a zero-pole-gain model. Realization type—Specifies the type of realization to use. You can select one of the following types of state-space realization: Minimum (default)—Provides a system model after removing zero-pole cancellations and all states that do not affect the output of the system. Full—Provides a system model without reducing any states or canceling any zero-pole pairs. Tolerance—Determines a circle where zero-pole cancellations can occur. If the difference between the location of a pole and a zero is within the Tolerance, this step removes the zero-pole pair if the Realization type is Minimum. This option is available only when you select Minimum from the Realization type pull-down menu. The default is 1E–16. Apply canonical form—Transforms the model to a canonical form. You can place a checkmark in the Apply canonical form checkbox if you select State-Space or Transfer Function from the Model Type Conversion pull-down menu. If you select State-Space and place a checkmark in the Apply canonical form checkbox, the Form type option appears. If you select Transfer Function and place a checkmark in the Apply canonical form checkbox, the Transformation type option appears. Form type—Specifies the type of canonical form you want to apply to the state-space model you create. The Form type option appears if you select State-Space from the Model Type Conversion pull-down menu and place a checkmark in the Apply canonical form checkbox. You can select one of the following form types: Modal (default) Controllability Controller Companion Observability Observer Companion Transformation type—Specifies the type of canonical form you want to apply to the transfer function you create. The Transformation type option appears if you select Transfer Function from the Model Type Conversion pull-down menu and you place a checkmark in the Apply canonical form checkbox. You can select one of the following transformation types: Highest Term (default) Lowest Term

Type Conversion Details

Refer to the LabVIEW Control Design User Manual for more information about converting models.

Note You must install the LabVIEW Control Design and Simulation Module to access this manual.

Access this manual by navigating to the labview\manuals directory and double-clicking CD_User_Manual.pdf.

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