Patent ID: 8332145
Filing Date: 2012-12-11
Classification: G05D,G08G

Abstract:
1. A method for generating a flight speed profile of an aircraft according to an RTA constraint, using a flight management system, said method comprising the following steps: for a determined current position of the aircraft along a flight plan, determination of at least two reference speed profiles according to the curvilinear abscissa X of the aircraft along the flight plan, comprising a minimum speed profile V min(X) and a maximum speed profile Vmax(X), storage of a plurality of pairs (Tvmin(Xi),Xi) and (Tvmax(Xi),Xi) of values of times of passage of the aircraft at curvilinear abscissa points Xi subsequent to the current position as far as the abscissa of the point at which the RTA isapplied for the reference speed profiles, application at any point of curvilinear abscissa X of the flight plan of a speed setpoint VΩ(X) of the aircraft determined on the basis of the speed profiles V min(X) and V max(X) weighted by proportionality ratios between T(X), Tvmin(X) and Tvmax(X) with flight management system; T(X) designating the time of passage of the aircraft at the point of the flight plan of curvilinear abscissa X, Tvmax(X) designating the time of passage at the curvilinear abscissa point X, for a flight according to the minimum speed profile Vmin(X) reaching the point at which the RTA is applied by observing the RTA constraint, and Tvmin(X) designating the time of passage at the curvilinear abscissa point X, for a flight according to the maximum speed profile Vmax(X) reaching the point at which the RTA is applied by observing the RTA constraint, the values of Tvmin(X) and Tvmax(X) being determined by a linear interpolation based on the corresponding stored pairs of values for the closest points either side of the curvilinear abscissa point X.