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US 2012/0056760 A1Published application
Method And Device For Automatically Determining An Erroneous Height Value Of A Radioaltimeter Mounted On An Aircraft
AssigneeAirbus Operations GmbH
InventorsThierry Bourret, Pierre-Antoine Lierman
Life of this patent
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Abstract
Method and device for automatically determining an erroneous height value of a radio altimeter mounted on an aircraft. The device (1) includes means (12, 13, 15) for comparing the duration between two height thresholds to a predetermined reference time, by taking account of current height values of the radio altimeter (2), during an approach phase.
Claims10
A method for automatically detecting an erroneous height value supplied by a radio altimeter mounted on an aircraft,
- wherein, during an approach phase of the aircraft, with a view to landing, the following operations are automatically performed:
- a1) measuring the duration between the times where two thresholds are reached relative to the altitude, by taking into account the current height values supplied by said radio altimeter;
- b1) comparing such a measured duration to a predetermined reference time, being lower than a flight duration allowing the aircraft to descend from the highest threshold (of said thresholds) to the lowest threshold at an approach maximum vertical speed of said aircraft;
- and
- c1) if said duration is lower than said reference time, detecting an erroneous height value.
2 more elements
A device for automatically detecting an erroneous height value supplied by a radio altimeter mounted on an aircraft, further comprising:
- first means for monitoring parameters available on the aircraft and for automatically measuring, during an approach phase with a view to a landing of the aircraft, the duration between the times where two thresholds are reached relative to the altitude, by taking into account the current height values supplied by said radio altimeter;
- and
- second means for comparing, automatically, such a measured duration to a predetermined reference time, being lower than a flight duration allowing the aircraft to descend from the highest threshold of said thresholds to the lowest threshold at an approach maximum vertical speed of said aircraft;
- and for detecting an erroneous height value, if said measured duration is lower than said reference time.
1 more element
Dependencies are inferred from the claim text.