Method for the guidance of a rotorcraft, which method limits noise discomfort in a procedure for the approach to a landing point

Abstract

A method for the guidance of a rotorcraft () in relation to a landing point (Pp) in accordance with a landing procedure. An approach route (R) is identified and an approach trajectory (T) is calculated in accordance with a ground slope (S) imposed by the approach route (R). An upstream segment (Sam) of the approach trajectory (T) is calculated through the application of a typical trajectory, as defined in accordance with the ground slope (S), the current mass of the rotorcraft (), and a low-noise or noise-abatement criterion relating to the noise discomfort generated by the rotorcraft (), taking into consideration a wind model (V) that represents the change in the wind between a current position of the rotorcraft () and the landing point (Pp). The position of the rotorcraft () is adjusted in proximity to the landing point (Pp) along the length of a transitional segment (St) of the approach trajectory (T), excluding, from the extension of the transitional segment (St), an application of the typical trajectory, and taking into consideration the ability of the rotorcraft () to perform a rapid maneuver toward a downstream segment (Sav) of the approach trajectory (T), as predefined in accordance with the ability of the rotorcraft () to reach the landing point (Pp) during stable flight.