Automatic Termination Criteria Saves Simulation Time

The Analyze Project Contents functionality provides a simplified input method for the termination criteria based on the project setup. The minimum simulation time, maximum simulation time and convergence threshold are calculated from the project contents. The default settings work well for most cases, but there are several classes of problems which require the settings to be modified; for instance, highly resonant structures may require the maximum criteria to be increased.

Under Analyze Project Contents the convergence threshold is separated into two values for sinusoidal and broadband waveform shapes. The value is chosen based on the active waveforms in the simulation. Often the sinusoidal convergence requires a lower threshold to ensure convergence has been reached. The convergence threshold used will be reported in the threshold spin box. Both minimum and maximum criteria may be set using two different inputs. The grid diagonals entry uses the maximum extent of the simulation space as a relative metric to define time using the speed of light in free space medium. When a sinusoidal waveform is active the sinusoid periods entry method will also be used. The maximum of the two entry methods determines the simulation time.

To use Project Contents Termination Criteria Properties, go to Simulations, select the "Specify Termination" option and check "Analyze Project Contents." The convergence threshold is -30 dB for Broadband and -40 dB for Sinusoid.