To Perform an Optimization Study
If you have a license for Mechanism Dynamics, the dynamics measures created in Mechanism Dynamics are available under Goals and Design Constraints.
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 You cannot specify an integer parameter to be used in the optimization or feasibility study. |
1. Click
Analysis and then click the arrow next to
Feasibility/Optimization. Click
Feasibility/Optimization. The
Optimization/Feasibility dialog box opens with
Optimization selected.
2. Under Goal, select the objective of the optimization to be applied to a given analysis feature parameter.
3. From the list of available analysis feature parameters on the right, select the parameter to optimize.
4. To create a design constraint, click Add under Design Constraints. The Design Constraints dialog box opens.
a. Select an analysis feature parameter and an operator.
b. Under Value, click Current to accept the current value, or click Set to type the value for the constraint.
c. Click OK in the Design Constraints dialog box to return to the Optimization/Feasibility dialog box.
The names and values for the selected constraints appear under Parameter, Operator, and Value. You can edit these entries directly by clicking the cell.
5. To delete a design constraint, select a constraint and click Delete.
6. To set design variables, click one of these buttons under Design Variables:
◦ Add Dimension—Select a dimension to vary and enter its minimum and maximum values. You can add several variable dimensions.
◦ Add Parameter—From the Parameter Selection dialog box, select an existing independent model parameter and enter its minimum and maximum values.
7. To edit an entry, click the cell and enter a new value.
8. To delete a design variable, select a variable and click Delete.
9. (Optional) Set display preferences for the study by clicking Options > Preferences. In the Graphs tab, you can set the following options:
◦ Goal—Show in a graph the convergence between the selected goal parameter and the chosen constraints after the computation is made.
◦ Constraints—Show in a graph the constraint parameter values during the computation.
◦ Variables—Show in a graph the variable values during the computation.
In the Run tab, you can set the following options:
◦ Convergence %—Use the default or type a value for the convergence criterion. Computation stops when the difference between the parameter values for the current and previous iteration is less than the Convergence %. The lower the value, the longer the calculation takes and, if there is a feasible solution, the more accurate the results.
◦ Max Iterations—Use the default or type in a value for the maximum number of iterations for the computation. The higher the value, the longer the calculation takes and the more specific the results.
◦ Animate model—Animate changes in the model for the computed results.
Under the Method tab, you can select the optimization method:
◦ GDP—Use the standard algorithm to optimize the model using the current model conditions as the starting point.
◦ MDS—Use the multi-objective design studies algorithm to determine the optimum starting point for the optimization. You can specify the number of starting points to compute in the Max Iterations field. This method has a higher chance of finding the overall optimum design within the design parameters and dimensions.
10. Click OK to save and accept the changes for the Preferences dialog box.
11. Click Compute. Creo Parametric calculates and displays the results.
12. To create an Optimization feature, click File > Make Feature and type a name for the feature.
| Make Feature option is available only when you compute the analysis. |
13. To save the study, click File > Save.
14. Click Close.