BFF Motion Driver v2 - Short User Guide


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11. Mix Settings


These settings do not apply to independent (uncoupled) actuator output (Rig_Type=0).


In the case of motion platforms with "coupled" 3-point support actuator arrangements (Rig_Type=1) the M settings window is used to set the proportion of the actuator movement range that each cue can use.


For example if the mix proportions are all set to 100% then a maximum pitch cue from the motion driver would utilise all of the available actuator travel range. There would then be no more stroke available if some roll or heave cue was required at the same time. The mix settings can be adjusted to limit the amount of stroke the pitch cue could use - so leaving some for the other cues if the pitch goes to maximum.


What the correct settings might be depends on your flying style. In commercial aircraft flying you will not usually get maximum pitch and roll conditions occurring at the same time. However you will often get pitch and heave, or roll and heave occurring simultaneously. Setting the pitch and roll utilisation to 75% and the heave to 50% say would leave some heave capacity even when the pitch or roll goes to a maximum. And when the there is no pitch or roll there would still be reasonable stroke length available for the more continuous heave motion.


You will probably need to experiment to obtain the mix settings that you think are best suited for your platform and flying style. The balance is between reserving enough stroke length for each DOF to allow reasonable mixing of cues to take place, and in not reserving so much stroke length that the available motion capacity goes largely unused most of the time.


Note that whatever your settings the total cue output will always be capped at the maximum stroke length of the actuators.


Use and Save

The changes you make manually to settings or changes made by the wizard will not be made active until the Use button is clicked. They will then be made active in the current driver session, but will not be saved to your .bff file. To save the changes to your file you must use the Save button.

IMPORTANT – Take great care when making changes to the cue settings as they can directly impact on the motion range. It is recommended that the adjusted cue output is viewed in the Virtual Oscilloscope and its stability assessed BEFORE the driver is put back in Drive mode and the platform made active.

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