panel set twindow_function dt_differential_equation
The DT_DIFFERENTIAL_EQUATION function returns the value of the time derivative of the state variable associated with the DIFFERENTIAL_EQUATION you specify in the DIFFERENTIAL_EQUATION_NAME parameter.
Format:
panel set twindow_function dt_differential_equation |
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differential_equation_name = | an existing equation |
Example:
panel set twindow_function dt_differential_equation & |
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differential_equation_name = | diff_eq_1 |
Description:
Parameter | Value Type | Description |
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differential_equation_name | An Existing Equation | Specifies an existing differential_equation. |
Extended Definition:
1. In instances, where a DIFFERENTIAL_EQUATION is used to define an implicit algebraic equation, the DT_DIFFERENTIAL_EQUATION function returns an approximation of the time derivative obtained by numerical differencing.
2. You may identify a differential_equation by typing its name or by picking it from the screen.
Since differential_equation do not have a geometric position, Adams View displays differential_equation icons at or near the model origin. If the differential_equation icon is not visible on the screen, you must type the name. You may also find it convenient to type the name even if the differential_equation icon is displayed.
If you created the differential_equation by reading an Adams data set or graphics file, the differential_equation name is the letters DIF followed by the Adams data set differential_equation ID number. The name of Adams DIFF/101 is DIF101, for example. If you created the differential_equation during preprocessing, you gave it a name at that time.
If a differential_equation is owned by the default model, you may identify it by entering its name only. If it is not, you must enter its full name. To identify a differential_equation under a different model, for instance, you may need to enter the model name as well. For example, you may specify differential_equation 'fluid_volume' from model 'hydro' by entering ".hydro.fluid_volume'".
You must separate multiple differential_equation names by commas.
If the differential_equation is visible in one of your views, you may identify it by picking on any of the graphics associated with it.
You need not separate multiple differential_equation picks by commas.
Tips:
1. If you type a "?", Adams View will list the differential_equation available by default.