Patent ID: 9045221
Filing Date: 2015-06-02
Classification: B64C,G05D

Abstract:
1. A guidance method of an aircraft for correcting a trajectory deviation due to a presence of wind during a phase of alignment of a trajectory according to an imposed direction of alignment passing through a determined point comprising the steps of: determining an instant at which the aircraft starts the alignment phase with a guidance system; determining a stored wind speed on a basis of at least one wind speed computed by the guidance system on the basis: loading a current air speed of the aircraft with respect to the surrounding air to the guidance system; determining a current estimated ground speed of the aircraft with respect to a frame of reference tied to the ground on the basis of the current air speed and of the determined stored wind speed with the guidance system; loading a current angular divergence to the guidance system between a straight line passing through the determined point and the aircraft on the one hand and the direction of alignment on the other hand; and computing a roll command of the aircraft with the guidance system during said phase of alignment on the basis of said current angular divergence and said current estimated ground speed, the computing of the roll command being thus performed without using the satellite navigation system during the alignment phase for determining a current ground speed.