Patent Document ID: 9984581
Application ID: 15162752
Patent Flag: 1

Claim One:
1. A piloting assistance method for avoiding an obstacle with a rotorcraft flying along a current speed vector (Vect 0 ), an alert being generated by an alert unit of an avionics equipment of the rotorcraft if an obstacle might be impacted by the rotorcraft, wherein a processor of the avionics equipment of the rotorcraft controls the alert unit to generate the alert by using a speed vector of the rotorcraft referred to as a “calculation” speed vector (Vect 1 ) for the processor to determine whether the rotorcraft might impact an obstacle, and during a correction stage (STP 3 ) and at each calculation iteration, the calculation speed vector (Vect 1 ) is determined by the processor using a horizontal component (V 1 ) of the calculation speed vector in a horizontal plane (P 1 ) orthogonal to gravity direction (AX), as determined by the processor, and a vertical component (V 2 ) of the calculation speed vector along the gravity direction (AX), as determined by the processor, the vertical component (V 2 ) being a function of a current vertical speed (Vv) of the rotorcraft relative to the ground, as determined by an inertial unit of the rotorcraft connected to the processor, at the calculation instant corrected with a corrective term (Vvp), the corrective term (Vvp) being a function of a product of a current path speed (Vt) of the rotorcraft, as determined by the inertial unit, multiplied by the derivative of the path speed.