COMSOL 6.2 - Generate Events Interface

	The Generate Events Interface feature is obsolete and cannot be added in version 6.2 and later, but may be present in models created by earlier versions of the software. You are advised to update your model to use the Events Timeline feature instead.

The feature is present by default. Additional features can be added to the interface in case, for example, to compare different scenarios based on different events. The feature controls an events interface that is solved for with the interface in order to detect the events times. It also automatically adds explicit events when the spacecraft goes into and out of eclipse.

Click the button to add a new in the same component with the events from the and sections. Alternatively, select an existing event interface in the list and click button to overwrite the autogenerated features of the selected event interface and replace them with the ones from the and sections. Before removing the autogenerated features, the user is prompted with a dialog to confirm this action. The manually added features of the events interface are untouched when the button is clicked.

Select the check box to enable the fast tumbling approximation at the beginning of the simulation. The approximation remains active until an event that specifies that the approximation is not longer enabled is triggered. This approximation replaces the evaluation of the radiation received by the Sun at every position by an averaged value. This option can be used if you assume that the spacecraft is tumbling sufficiently fast that all environmental heat loads can be averaged. It saves computational time by not computing the external sources view factors.

In the list, select the feature specifying the initial pointing direction of the spacecraft.

Set the list to the feature specifying the initial orientation of the spacecraft.

The table lists all the implicit events taken into account during the spacecraft orbit. For each event set the to any implicit available event.

Set the and the to define the spacecraft positioning when the event occurs. The positioning is repeated each time the event type is encountered.

Set the check box to control whether the fast tumbling approximation (see Initial Orientation) is active or not when the event occurs.

There are four types of predefined implicit events:

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: triggered when a user defined condition is fulfilled. This event is optional, multiple features can be added in the interface.

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: triggered when the ground station is visible from the spacecraft given the approach and elevation angles. Another event is triggered when the ground station is out-of-sight. The fast tumbling approximation is always disabled when the ground station becomes visible. When the station becomes out-of-sight the approximation is enabled or not depending on the corresponding setting in the feature. This event is optional, multiple features can be added in the interface.

Add events in the table by setting at which the event occur and what is its corresponding and the at this time. The event is repeated every period specified in the column. Set to inf (default) if the event does not repeat. Set the check box to control whether the fast tumbling approximation (see Initial Orientation) is active or not when the event occurs.