Feedback Iterator Component Properties

The Feedback Iterator's primary role is to control iterative solves and its properties target this end.

For Maxwell and HFSS, the Feedback Iterator properties are:

Iterations Completed – a read-only property that displays the number of iterations completed.
Max Iterations – sets the maximum number of iterative solve loops to perform before terminating iterations in case the Target Delta Temperature % or Target Delta Displacement % is not achieved. The default value is 100.
Target Delta Temperature % – specifies the maximum Target Delta Temperature % that signifies convergence. The default value is 5%, and the value must be 0.01 or greater.
Note:
• The delta temperature error is calculated in Kelvins.
• The Maxwell and HFSS design Profile tab displays absolute/relative delta data, while the delta temperate in Workbench means the relative delta (expressed as %).
Target Delta Displacement % – specifies the maximum Target Delta Displacement % that signifies convergence. The default value is 5%, and the value must be 0.01 or greater.

The Feedback Iterator properties also display the most recently achieved Latest Delta Temperature % and Latest Delta Displacement % values, allowing the user to manually abort when satisfied with the achieved deltas.

Note:

Both the Temperature and Displacement Convergence properties sections are always shown irrespective of which feedback types are enabled for the project.

Running a two-way feedback simulation from Workbench while keeping the Maxwell or HFSS Profile tab open shows that the 3D solver keeps track of two feedback related quantities:

Maximum Absolute/Relative Delta Temperature (if temperature feedback is enabled)
Maximum Absolute/Relative Delta Displacement (if displacement feedback is enabled)

These signify the maximum difference on the solution mesh of the quantity in question from one feedback iteration to the next (thus the value is only available from the second iteration onward). This data forms the basis for the convergence controls in the FeedbackIterator. These controls allow the user to base the termination of feedback iterations on a target max delta T and/or max delta displacement. The target max delta forms the convergence condition.