Method and device for aiding the piloting of an aircraft
First Claim
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1. Method for assisting the piloting of an aircraft, the method comprising:
- a) generating a roll instruction for the aircraft;
b) measuring current values of flight characteristics of the aircraft and current values of wind characteristics existing outside of the aircraft;
c) calculating a predicted path according to the generated roll instruction and the measured current values of wind characteristics by;
c1) calculating a first path which exhibits a constant roll angle corresponding to the generated roll instruction but which does not take account of the current values of the wind characteristics; and
c2) integrating the current values of the wind characteristics into the first path to obtain a predicted path which is at a constant roll angle; and
d) following calculating the predicted path, carrying out the following operations α and
β
repetitively;
α
) determining a new roll instruction based on the predicted path to obtain a new predicted path which approaches a particular point (P0); and
β
) repeating calculation of the new predicted path based on a new roll instruction until the new predicted path joins the particular point.
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Abstract
Method and device for assisting the piloting of an aircraft.
- The device (1) comprises means (4) for determining, using a roll instruction and measured current values of external characteristics and of flight characteristics of the aircraft, a predicted path which is a flight path having a constant roll angel, taking account of the effect of the wind.
23 Citations
12 Claims
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1. Method for assisting the piloting of an aircraft, the method comprising:
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a) generating a roll instruction for the aircraft; b) measuring current values of flight characteristics of the aircraft and current values of wind characteristics existing outside of the aircraft; c) calculating a predicted path according to the generated roll instruction and the measured current values of wind characteristics by; c1) calculating a first path which exhibits a constant roll angle corresponding to the generated roll instruction but which does not take account of the current values of the wind characteristics; and c2) integrating the current values of the wind characteristics into the first path to obtain a predicted path which is at a constant roll angle; and d) following calculating the predicted path, carrying out the following operations α and
β
repetitively;α
) determining a new roll instruction based on the predicted path to obtain a new predicted path which approaches a particular point (P0); andβ
) repeating calculation of the new predicted path based on a new roll instruction until the new predicted path joins the particular point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Device for assisting the piloting of an aircraft, the said device comprising:
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roll instruction generator that generates a roll instruction for the aircraft; aircraft information source that measures current values of flight characteristics of the aircraft and current values of wind characteristics existing outside of the aircraft; and predicted path calculator that calculates, according to the generated roll instruction and the said measured current values, a predicted path which is a flight path with a constant roll angle, the predicted path calculator comprising; a first element that calculates a first path which exhibits a constant roll angle corresponding to the generated roll instruction, but which does not take account of the current values of the wind characteristics; and a second element that integrates the current values of the wind characteristics into the first path to obtain the said predicted path; wherein the predicted path calculator comprises a first unit that determines a new roll instruction based on the predicted path to obtain a new predicted path which approaches a particular point and a second unit that repeatedly calculates the new predicted path taking account of the new roll instruction until the new predicted path joins the particular point.
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11. A method for assisting the piloting of an aircraft, the method comprising:
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a) generating a roll instruction for the aircraft; b) measuring current values of flight characteristics of the aircraft and current values of wind characteristics existing outside of the aircraft; c) calculating a predicted path according to the generated roll instruction and the measured current values of wind characteristics by; c1) calculating a first path which exhibits a constant roll angle corresponding to the generated roll instruction but which does not take account of the current values the wind characteristics, wherein the first path is determined as a circular path of constant radius R and the said radius R is calculated using the following expression;
R=(Vtas2/g)/tan φwherein; Vtas is the measured speed of the aircraft; g is the acceleration of gravity; tan is the tangent; and φ
is the said roll instruction; andc2) integrating the current values of the wind characteristics into the first path to obtain a predicted path (Tp) which is at a constant roll angle; and d) following calculating the predicted path, carrying out the following operations α and
β
repetitively;α
) determining a new roll instruction based on the predicted path to obtain a new predicted path which approaches a particular point; andβ
) repeating calculation of the new predicted path based on a new roll instruction until the new joins the particular point.
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12. A method for assisting the piloting of an aircraft, the method comprising:
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a) generating a roll instruction for the aircraft; b) measuring current values of flight characteristics of the aircraft and current values of wind characteristics existing outside of the aircraft; c) calculating a predicted path according to the generated roll instruction and the measured current values of wind characteristics by; c1) calculating a first path which exhibits a constant roll angle corresponding to the generated roll instruction but which does not take account of the current values the wind characteristics; and c2) integrating the current values of the wind characteristics into the first path to obtain a predicted path which is at a constant roll angle, wherein the predicted path Tp comprises a number n of points P1 to Pn, and each of the points Pp of the predicted path, with 1≦
p≦
n, has the following coordinates Xp and Yp in an aircraft reference system;
Xp=R.[1−
cos(π
.p/n)]+R(π
.p/n).(Wsp/Vtas).cos(Wdir-Hdg)
Yp=R. sin(π
.p/n)+R(π
.p/n)(Wsp/Vtas)sin(Wdir-Hdg)in which expressions; R is the radius of the said first path; Wsp is the measured force of the wind; Vtas is the measured speed of the aircraft; Wdir is the direction of the wind, measured and projected into the aircraft reference system; and Hdg is the measured heading of the aircraft; and d) following calculating the predicted path, carrying out the following operations α and
β
repetitively;α
) determining a new roll instruction based on the predicted path to obtain a new predicted path which approaches a particular point; andβ
) repeating calculation of the new predicted path based on a new roll instruction until the new joins the particular point.
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Specification