Patent Document ID: 20160351060
Application ID: 15162752
Patent Flag: 0

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 if an obstacle might be impacted by the rotorcraft, wherein the alert is generated by using a speed vector of the rotorcraft referred to as a “calculation” speed vector (Vect 1 ) in order 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 using a horizontal component (V 1 ) of the calculation speed vector in a horizontal plane (P 1 ) orthogonal to gravity direction (AX) and a vertical component (V 2 ) along the gravity direction (AX), the vertical component (V 2 ) being a function of a current vertical speed (Vv) of the rotorcraft relative to the ground 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 multiplied by the derivative of the path speed.