Patent ID: 9493234
Filing Date: 2016-11-15
CPC Classification: B64C,G01P,G05D

Claim Text:
1. A method of determining an angular velocity in turning for a rotary wing aircraft, the aircraft flying along a track T sol relative to the ground at a speed of advance Vα, which speed of advance Vα may be determined relative to the ground in order to form a speed of advance relative to the ground Vα sol and relative to the air in order to form a speed of advance relative to the air Vα air , a longitudinal direction X extending from the front of the aircraft to the rear of the aircraft, an elevation direction Z extending upwards perpendicularly to the longitudinal direction X, and a transverse direction Y extending from right to left perpendicularly to the longitudinal and elevation directions X and Z, the aircraft comprising: at least one rotary wing having a plurality of blades of collective pitch and of cyclic pitch that are variable about respective pitch axes, the aircraft being capable of performing movements in rotation about the directions and in translation along the directions; and an autopilot for generating control signals in compliance with predefined modes of operation and in compliance with flight setpoints, the control signals being capable of causing the aircraft to form the movements in rotation and/or translation relative to the directions; the method including the following steps: the longitudinal speed V determining the anticipation value A for the angular velocity in yaw ({dot over (ψ)}) such that: where G y is a lateral acceleration of the aircraft under the control of a pilot of the aircraft; determining a lateral speed V the lateral speed V the lateral speed V the lateral speed V determining the correction value B for the angular velocity in yaw {dot over (ψ)} such that: K 2 being a second multiplier coefficient; and determining the angular velocity in yaw {dot over (ψ)} so as to follow the track T