A-380 probes
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A-380 probes
On top of the nose cone, the 380 has 3 probes not seen on the other Airbus types. They look similar in shape to the usual AoA probes but are probably dedicated to measure the yaw ... ?
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Those Side Slip probes each report their measurements to their applicable ADR part of the ADIRU. The ADIRU provide the SSA to the respective PRIM. The data provided is used in all sorts of ways. Slip in turn, slip with E/O, crosswind slip, Y* law calculations and a great many other ways. If the SSA data to one ADIRU is corrupt then that data is excluded. If two ADR's receive corrupt SSA data then all SSA data is excluded and the flight control law reverts to Alternate Law.
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If the SSA data to one ADIRU is corrupt then that data is excluded
In the eventuality of 2 SSA probes provide an identical but erroneous data, I presume flight control law will remain normal ... Are we aware of any ill effect such dysfunction would provoke on the airplane behavior ?
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All monitoring relies on a voting principle whereby when one source diverges from the average value, it is automatically rejected.
As your questioning has now descended to the fanciful, I withdraw from the discussion.
In the eventuality of 2 SSA probes provide an identical but erroneous data,.....
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As not likely with three independent systems.
It would be called common mode failure, for which the system will be designed against and the safety case would support.
We do quite a lot of thinking (i.e. engineering) when designing aircraft you know
It would be called common mode failure, for which the system will be designed against and the safety case would support.
We do quite a lot of thinking (i.e. engineering) when designing aircraft you know
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As not likely with three independent systems.
It would be called common mode failure, for which the system will be designed against and the safety case would support.
We do quite a lot of thinking (i.e. engineering) when designing aircraft you know.
It would be called common mode failure, for which the system will be designed against and the safety case would support.
We do quite a lot of thinking (i.e. engineering) when designing aircraft you know.
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Originally Posted by typhoid
We do quite a lot of thinking (i.e. engineering) when designing aircraft you know
Every time another sophisticated feature is brought up, there is an open door for new surprises. Those new Side Slip Angle probes seem to achieve a lot through the flight controls, I think it is worth asking now what if … or we may have to learn it the hard way later on.
