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US 7,584,027 B2Granted
Aircraft navigation aid method and corresponding device
AssigneeThales
InventorJean-Christophe Jaillant
Life of this patent
Estimating the term…
Abstract
The invention relates to an aircraft navigation aid method. It comprises steps of computing a feeler line ground path that the aircraft would follow if a turn at the maximum rate applicable to the current flight phase of the aircraft were to begin at that instant, and displaying on a navigation screen the feeler line and a ground path to be captured, in order to determine how to place the aircraft in a turn in order to optimize the capture of the path to be captured
Claims15
An aircraft navigation aid method comprising the following steps:
- a) computing a feeler line ground path, wherein the feeler line ground path is a projection on the ground of a flight path that an aircraft follows when turning at the maximum rate, and the computing of the feeler line ground path includes taking into account the effect of the wind on the path of the aircraft;
- and
- b) displaying simultaneously on a navigation screen two alternative flight paths for the aircraft, the two alternative flight paths being the feeler line ground path and a ground path to be captured and the ground path to be captured is a projection on the ground of a flight path to be captured, in order to determine how to place the aircraft in a turn in order to optimize the capture of the flight path to be captured.
An onboard aircraft navigation aid device comprising at least a program memory and a user interface, comprising:
- a program memory configured to store a feeler line computation program, for computing a feeler line ground path, wherein the feeler line ground path is a projection on the ground of a flight path that the aircraft follows when turning at the maximum rate, and the computing of the feeler line ground path includes taking into account the effect of the wind on the path of the aircraft, and configured to store a program for displaying simultaneously on the user interface two alternative paths for the aircraft, the two alternative paths being a ground path to be captured and the feeler line ground path, wherein the ground path to be captured is a projection on the ground of a flight path to be captured.
An aircraft navigation aid method comprising the following steps:
- a) computing a feeler line ground path, wherein the feeler line ground path is a projection on the ground of a flight path that an aircraft would follows when turning at the maximum rate, and the computing of the feeler line ground path includes taking into account the effect of the wind on the path of the aircraft;
- b) displaying simultaneously on a navigation screen two alternative flight paths for the aircraft, the two alternative flight paths being the feeler line ground path and a ground path to be captured and the ground path to be captured is a projection on the ground of a flight path to be captured, in order to determine how to place the aircraft in a turn in order to optimize the capture of the flight path to be captured, wherein a form of a right feeler line is given by a parametric equation of the form:
- {
- x
- =
- ⌊
- R
- air
-
- [
- 1
- -
- cos
-
- (
- t
-
-
- θ
- .
- )
- ]
- +
- V
- 8
-
- t
- ⌋
-
- cos
-
-
- d
- -
- ⌊
- R
- air
-
- sin
-
- (
- t
-
-
- θ
- .
- )
- +
- V
- y
-
- t
- +
- D
- V
- ⌋
-
- sin
-
-
- dll
- ′
- y
- =
- ⌊
- R
- air
-
- [
- 1
- -
- cos
-
- (
- t
-
-
- θ
- .
- )
- ]
- +
- V
- x
-
- t
- ⌋
-
- sin
-
-
- d
- +
- ⌊
- R
- air
-
- sin
-
- (
- t
-
-
- θ
- .
- )
- +
- V
- y
-
- t
- +
- D
- V
- ⌋
-
- cos
-
-
- dll
- ′
- Rair being the radius of the turn that the airplane would have without wind, {dot over (θ)} being the angular speed of the airplane in the air during the turn that the airplane would have without wind, Vx and Vy being the components of the wind speed vector, t being the time with t=0 at the start of the turn, Dv being the distance to the turn and d being the drift angle.
119 more elements
An aircraft navigation aid method comprising the following steps:
- a) computing a feeler line ground path , wherein the feeler line ground path is a projection on the ground of a flight path that an aircraft follows when turning at the maximum rate, and the computing of the feeler line ground path includes taking into account the effect of the wind on the path of the aircraft;
- b) displaying simultaneously on a navigation screen two alternative flight paths for the aircraft, the two alternative flight paths being the feeler line ground path and a ground path to be captured and the ground path to be captured is a projection on the ground of a flight path to be captured, in order to determine how to place the aircraft in a turn in order to optimize the capture of the flight path to be captured, wherein a form of a left feeler line is given by a parametric equation of the form:
- {
- x
- =
- ⌊
- R
- air
-
- [
- 1
- -
- cos
-
- (
- t
-
- θ
- .
- )
- ]
- +
- V
- 8
-
- t
- ⌋
-
- cos
-
-
- d
- -
- ⌊
- R
- air
-
- sin
-
- (
- t
-
-
- θ
- .
- )
- +
- V
- y
-
- t
- +
- D
- V
- ⌋
-
- sin
-
-
- dll
- ′
- y
- =
- ⌊
- R
- air
-
- [
- 1
- -
- cos
-
- (
- t
-
-
- θ
- .
- )
- ]
- +
- V
- x
-
- t
- ⌋
-
- sin
-
-
- d
- +
- ⌊
- R
- air
-
- sin
-
- (
- t
-
-
- θ
- .
- )
- +
- V
- y
-
- t
- +
- D
- V
- ⌋
-
- cos
-
-
- dll
- ′
- Rair being the radius of the turn that the airplane would have without wind, {dot over (θ)} being the angular speed of the airplane in the air during the turn that the airplane would have without wind, Vx and Vy being the components of the wind speed vector, t being the time with t=0 at the start of the turn, Dv being the distance to the turn and d being the drift angle.
118 more elements
Dependencies are inferred from the claim text.