Patent ID: 8190306

Claim:
A method for attenuating vertical turbulence on an aircraft during flight, the method comprising the steps of: a) determining, by a wind determining unit, a vertical wind component existing outside the aircraft at a current position of said aircraft; b) calculating, by a calculating unit, based on the determined vertical wind component: a first control order to control movement of at least one first controllable movable member to act on aircraft lift, said first control order minimizing amplitude of vertical turbulence load factors on the aircraft due to vertical turbulence; and a second control order to control movement of at least one second controllable movable member to act on aircraft pitch, said second control order compensating for pitch moment of the aircraft due to the movement control of said first movable member; c) verifying, by a verification unit, activation conditions evidencing severe turbulence are in effect; wherein said first control order is transmitted to at least one actuator of said first controllable movable member; said second control order is transmitted to at least one actuator of said second controllable movable member, and in the course of the flight, the following series of successive steps is carried out: α) determining, based on the determined vertical wind component, a standard deviation of the wind; β) comparing the determined standard deviation with a predetermined threshold value, said threshold value being such that, when the determined standard deviation is greater than or equal to said threshold value, the frequency of the wind is less than that of an oscillation of the incidence of the aircraft, due to the wind; γ) calculating, based on current flight parameter values, a second auxiliary control order to control said second controllable movable member to act on the aircraft pitch, said second auxiliary control order acting indirectly on the aircraft lift at a center of gravity of the aircraft to increase the load factor amplitude; and δ) transmitting, when said standard deviation is greater than or equal to said threshold value, said second control order to the actuator of said second movable member so that said second movable member is subjected to a global control order corresponding to a sum of said second control order and of said second auxiliary control order.