Including Unscheduled Updates in Time History Results

In some cases, events or other changes in the model may not fall exactly on a scheduled update. That is, some events or changes may actually occur between scheduled updates of the model. These trigger an “unscheduled update” of the model. Unscheduled updates are timesteps that are dynamically inserted by GoldSim during the simulation in order to more accurately simulate the system.

Unlike scheduled updates, unscheduled updates do not normally appear in time history plots and tables. That is, although these timesteps may affect the results (e.g., by making them more accurate at the scheduled timesteps), unscheduled updates of the model are not saved and displayed. Only the scheduled updates are actually saved and displayed.

In some cases, however, it may be of interest to see the values of selected outputs at unscheduled updates. To facilitate this, GoldSim provides an option in the Advanced Time settings to save results at unscheduled updates (referred to as “high resolution” results). This option appears at the bottom of the Advanced Time Settings dialog (accessed from the Advanced… button on the Time tab of the Simulation Settings dialog):

By default, the checkbox labeled Include unscheduled updates (high resolution results) in scalar time histories is cleared. If you check this box, GoldSim will save unscheduled updates for time history results (referred to as “high resolution” results) under the following conditions:

• High resolution results can only be viewed from within Time History Result elements. If the output is not referenced by a Time History Result element, high resolution results will not be displayed.

• High resolution results are only available for single realization runs (Deterministic simulations or probabilistic simulation with a single realization).

• High resolution results are only available for scalar outputs.