METHOD FOR IMPROVING A FLIGHT TRAJECTORY OF AN AIRCRAFT AS A FUNCTION OF METEOROLOGICAL CONDITIONS

摘要

A navigation aid method to determine an improved trajectory between points of departure and arrival as a function of a trajectory cost, comprises: determining a grid of nodes, loading meteorological data at the nodes, determining for each node, an average instantaneous cost from a first instantaneous cost as a function of a ground speed taking into account meteorological data loaded at the node concerned, and from a second instantaneous cost as a function of a ground speed that does not take into account the loaded meteorological data, determining a length of a trajectory passing through the node and arriving at the point of arrival, determining a cost grid assigning, at each of the nodes of the grid, a local cost determined from the average instantaneous cost and the length, determining an improved trajectory from the cost grid, and graphically representing the improved trajectory and/or the cost grid to a crew.

主权项

1. A navigation aid method, executed by a flight management system to determine an improved trajectory between a point of departure and a point of arrival as a function of a trajectory cost, comprising the steps of:
determining a grid of nodes within an area of predetermined dimensions and comprising the points of departure and of arrival, loading meteorological data at said nodes, determining, for each node, an average instantaneous cost from a first instantaneous cost that is a function of a ground speed of the aircraft taking into account the meteorological data loaded at the node concerned, and from a second instantaneous cost that is a function of a ground speed of the aircraft that does not take into account the loaded meteorological data, determining a length of a trajectory passing through said node and arriving at the point of arrival, determining a cost grid assigning, at each of the nodes of the grid, a local cost determined from the average instantaneous cost and said length, determining an improved trajectory from said cost grid, graphically representing the improved trajectory and/or the cost grid to a crew.