Terrain avoidance system for transport aircraft
First Claim
1. A system onboard an aircraft, for preventing collisions with a terrain based on a risk of collision with the terrain after a predetermined forecast delay to the penetration of a cartographic representation of the terrain being flown over, stored in a database accessible to the aircraft, into a protection volume linked to the aircraft located relative to the terrain being flown over by means of onboard locating equipment, oriented in the direction of progress of the aircraft and configured so as to model a standard terrain vertical avoidance maneuver path engaged over the forecast delay based on the path followed by the aircraft predicted from flight information delivered by aircraft flight equipment, assuming that the aircraft maintains a current speed vector thereof with the same trend, if the aircraft is in the process of changing, said system comprising:
- means for detecting a limit-point of success of a standard terrain vertical avoidance maneuver likening the crossing of the limit-point by the aircraft to the penetration of the terrain into a first protection volume linked to the aircraft and configured so as to model a standard vertical avoidance maneuver path executed without notable delay, said path being predefined according to the aircraft type;
means for determining azimuth disengagement sectors, either side of the direction of progress of the aircraft, suitable for the success of a standard terrain vertical avoidance maneuver, said means for determining azimuth disengagement sectors includingmeans for determining a second protection volume with a larger azimuth aperture than that of the first limit-point protection volume, linked to the aircraft and configured so as to contain the first limit-point protection volume and, for the various azimuths covered, paths of a composite maneuver beginning with change-of-heading maneuvers with which to reach the azimuth concerned and continuing with the standard terrain vertical avoidance maneuver, said paths being, over parts corresponding to the standard vertical avoidance maneuver, predefined according to the aircraft type, andmeans for determining penetration of the terrain into the protection volume,wherein the azimuth disengagement sectors are free of penetration of the terrain into said first protection volume;
means for signaling the crossing of the limit-point of success of the standard terrain vertical avoidance maneuver; and
means for signaling the azimuth disengagement sectors.
1 Assignment
0 Petitions
Accused Products
Abstract
A system indicating to a pilot that an aircraft has passed the limit-point of success of a standard vertical avoidance maneuver is disclosed. To determine the limit-point, the system monitors a penetration of a model of the terrain being flown over into a first protection volume linked to the aircraft and configured so as to model a standard vertical avoidance maneuver path executed without delay. To determine disengagement azimuth sectors, the system monitors the penetrations of the model of the terrain being flown over into a second protection volume with large azimuth aperture, linked to the aircraft and configured so as to contain the limit-point protection volume and, for the various azimuths covered, paths of a composite maneuver beginning with change-of-heading maneuvers with which to reach the azimuth concerned and continuing with the standard terrain vertical avoidance maneuver.
32 Citations
11 Claims
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1. A system onboard an aircraft, for preventing collisions with a terrain based on a risk of collision with the terrain after a predetermined forecast delay to the penetration of a cartographic representation of the terrain being flown over, stored in a database accessible to the aircraft, into a protection volume linked to the aircraft located relative to the terrain being flown over by means of onboard locating equipment, oriented in the direction of progress of the aircraft and configured so as to model a standard terrain vertical avoidance maneuver path engaged over the forecast delay based on the path followed by the aircraft predicted from flight information delivered by aircraft flight equipment, assuming that the aircraft maintains a current speed vector thereof with the same trend, if the aircraft is in the process of changing, said system comprising:
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means for detecting a limit-point of success of a standard terrain vertical avoidance maneuver likening the crossing of the limit-point by the aircraft to the penetration of the terrain into a first protection volume linked to the aircraft and configured so as to model a standard vertical avoidance maneuver path executed without notable delay, said path being predefined according to the aircraft type; means for determining azimuth disengagement sectors, either side of the direction of progress of the aircraft, suitable for the success of a standard terrain vertical avoidance maneuver, said means for determining azimuth disengagement sectors including means for determining a second protection volume with a larger azimuth aperture than that of the first limit-point protection volume, linked to the aircraft and configured so as to contain the first limit-point protection volume and, for the various azimuths covered, paths of a composite maneuver beginning with change-of-heading maneuvers with which to reach the azimuth concerned and continuing with the standard terrain vertical avoidance maneuver, said paths being, over parts corresponding to the standard vertical avoidance maneuver, predefined according to the aircraft type, and means for determining penetration of the terrain into the protection volume, wherein the azimuth disengagement sectors are free of penetration of the terrain into said first protection volume; means for signaling the crossing of the limit-point of success of the standard terrain vertical avoidance maneuver; and means for signaling the azimuth disengagement sectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification