Advanced terrain anti-collision device
First Claim
1. An onboard terrain anticollision device for an aircraft, comprising:
- a memory including topographic data of the terrain and/or of the obstacles overflown; and
an information processing apparatus comprising;
an input configured to receive flight parameters;
a first trajectory prediction unit configured to establish, on the basis of said flight parameters, at least a first safety surface corresponding to a first predicted trajectory, the first safety surface having a first flight duration and being bounded laterally by a first left limit and a first right limit, said first right and left limits being defined essentially by a first lateral margin and at least a first angle of left lateral aperture and at least a first angle of right lateral aperture;
a first topographic calculation unit configured to establish, on the basis of said flight parameters, at least a first topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown;
a first comparison unit configured to compare said first safety surface and the first topographic surface for determining at least one first risk of collision of the aircraft with the ground corresponding to the first flight duration;
a second trajectory prediction unit configured to establish, on the basis of the flight parameters, a second safety surface corresponding to a second predicted trajectory, the second safety surface having a second flight duration lesser than the first flight duration and being bounded laterally by a second left limit and a second right limit, said second right and left limits being defined essentially by a second lateral margin and at least a second angle of left lateral aperture and at least a second angle of right lateral aperture;
a second calculation unit configured to establish, on the basis of the flight parameters, a second topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown;
a second comparison unit configured to compare said second safety surface and the second topographic surface for determining a second risk of collision of the aircraft with the ground corresponding to the second flight duration;
a third trajectory prediction unit configured to establish, at least on the basis of the flight parameters, a third safety surface corresponding to a third predicted trajectory, the third safety surface having a third flight duration greater than the first flight duration and being bounded laterally by a third left limit and a third right limit, said third right and left limits being defined essentially by a third lateral margin and at least a third angle of left lateral aperture and at least a third angle of right lateral aperture;
a third topographic calculation unit configured to establish, at least on the basis of said flight parameters, a third topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown;
a third comparison unit configured to compare said third safety surface and the third topographic surface for determining at least one third risk of collision of the aircraft with the ground corresponding to the third flight duration; and
an alarm unit linked to said information processing apparatus and configured to generate;
a first alarm being a vertical avoidance alarm when the first risk of collision is avoidable by a simple vertical avoidance maneuver;
a second alarm being a traverse avoidance alarm when the second risk of collision is not avoidable by a simple vertical avoidance maneuver; and
a prealarm for indicating a potential collision according to the determined third risk of collision.
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Accused Products
Abstract
The field of the invention is that of onboard terrain anticollision systems for aircraft. Collisions with the terrain while the aircraft is fully controlled have been and still remain one of the main causes of air disasters. Several generations of devices for warning of risk of collision with the terrain have been developed for some thirty years now. The most advanced of these systems comprise means of alarm differing according to the maneuver to be performed by the pilot. It is of course vital that the recommended maneuver best guarantee the safety of the aircraft. The device according to the invention proposes a device comprising the calculation of several different safety surfaces or profiles. Their comparisons with the topographic data of the surrounding terrain make it possible to deduce therefrom the best alarm and the best maneuver to be performed to avoid the collision between the aircraft and the ground.
35 Citations
18 Claims
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1. An onboard terrain anticollision device for an aircraft, comprising:
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a memory including topographic data of the terrain and/or of the obstacles overflown; and an information processing apparatus comprising; an input configured to receive flight parameters; a first trajectory prediction unit configured to establish, on the basis of said flight parameters, at least a first safety surface corresponding to a first predicted trajectory, the first safety surface having a first flight duration and being bounded laterally by a first left limit and a first right limit, said first right and left limits being defined essentially by a first lateral margin and at least a first angle of left lateral aperture and at least a first angle of right lateral aperture; a first topographic calculation unit configured to establish, on the basis of said flight parameters, at least a first topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown; a first comparison unit configured to compare said first safety surface and the first topographic surface for determining at least one first risk of collision of the aircraft with the ground corresponding to the first flight duration; a second trajectory prediction unit configured to establish, on the basis of the flight parameters, a second safety surface corresponding to a second predicted trajectory, the second safety surface having a second flight duration lesser than the first flight duration and being bounded laterally by a second left limit and a second right limit, said second right and left limits being defined essentially by a second lateral margin and at least a second angle of left lateral aperture and at least a second angle of right lateral aperture; a second calculation unit configured to establish, on the basis of the flight parameters, a second topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown; a second comparison unit configured to compare said second safety surface and the second topographic surface for determining a second risk of collision of the aircraft with the ground corresponding to the second flight duration; a third trajectory prediction unit configured to establish, at least on the basis of the flight parameters, a third safety surface corresponding to a third predicted trajectory, the third safety surface having a third flight duration greater than the first flight duration and being bounded laterally by a third left limit and a third right limit, said third right and left limits being defined essentially by a third lateral margin and at least a third angle of left lateral aperture and at least a third angle of right lateral aperture; a third topographic calculation unit configured to establish, at least on the basis of said flight parameters, a third topographic surface constituted on the basis of the topographic data of the terrain and/or of the obstacles overflown; a third comparison unit configured to compare said third safety surface and the third topographic surface for determining at least one third risk of collision of the aircraft with the ground corresponding to the third flight duration; and an alarm unit linked to said information processing apparatus and configured to generate; a first alarm being a vertical avoidance alarm when the first risk of collision is avoidable by a simple vertical avoidance maneuver; a second alarm being a traverse avoidance alarm when the second risk of collision is not avoidable by a simple vertical avoidance maneuver; and a prealarm for indicating a potential collision according to the determined third risk of collision. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of operating an onboard terrain anticollision device for an aircraft, comprising:
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receiving flight parameters; establishing, on the basis of said flight parameters, a first safety surface corresponding to a first predicted trajectory, the first safety surface having a first flight duration; establishing a first topographic surface according to the flight parameters and the topographic data of terrain or obstacles; comparing the first safety surface and the first topographic surface for determining a first risk of collision; establishing, on the basis of the flight parameters, a second safety surface corresponding to a second predicted trajectory, the second safety surface having a second flight duration lesser than the first flight duration; establishing a second topographic surface according to the flight parameters and the topographic data of terrain or obstacles; comparing said second safety surface and the second topographic surface for determining a second risk of collision; establishing, on the basis of said flight parameters, a third safety surface corresponding to a third predicted trajectory, the third safety surface having a third flight duration greater than the first flight duration; establishing a third topographic surface according to the flight parameters and the topographic data of terrain or obstacles; comparing the third safety surface and the third topographic surface for determining a third risk of collision; generating a first alarm being a vertical avoidance alarm when the first risk of collision is avoidable by a simple vertical avoidance maneuver; generating a second alarm being a traverse avoidance alarm when the second risk of collision is not avoidable by a simple vertical avoidance maneuver; and generating a third alarm for indicating a potential collision according to the determined third risk of collision. - View Dependent Claims (18)
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Specification