초록 ▼

Disclosed are a method and device for attenuating vertical turbulence encountered by an aircraft during flight. Incorporated into the method and device is a wind determination device, which is used to determine a vertical wind component existing outside the aircraft. A severity level determination u

Disclosed are a method and device for attenuating vertical turbulence encountered by an aircraft during flight. Incorporated into the method and device is a wind determination device, which is used to determine a vertical wind component existing outside the aircraft. A severity level determination unit is used to determine a severity level of the vertical wind component determined by the wind determination device. A control unit calculates at least one control order based on the vertical wind component determined by the wind determination device. In addition, the control unit determines the actual existence of activation conditions determined according to the severity level determined by the severity level determination unit. Upon verifying the activation conditions, the control unit transmits the control order to at least one actuator of the at least one controllable movable member.

대표청구항 ▼

1. A method for attenuating vertical turbulence encountered by an aircraft during flight, the method comprising the steps of: a) determining, by a wind determination device, a vertical wind component existing outside the aircraft at a current position of said aircraft;b) determining, by a severity l

1. A method for attenuating vertical turbulence encountered by an aircraft during flight, the method comprising the steps of: a) determining, by a wind determination device, a vertical wind component existing outside the aircraft at a current position of said aircraft;b) determining, by a severity level determination unit, according to said determined vertical wind component, a severity level of the vertical turbulence existing outside the aircraft at said current position as a function of deviation in vertical load between a load factor at equilibrium for the aircraft and a load factor resulting from the vertical turbulence;c) calculating, by a control unit, according to said determined vertical wind component, at least one control order to control at least one controllable movable member configured to act on aircraft lift, said control order controlling amplitude of the vertical load generated on the aircraft by the vertical turbulence;d) determining, by said control unit, existence of activation conditions based on verification of the severity level of the vertical turbulence and deviation between a value of the control order and a predetermined threshold value; ande) transmitting, by said control unit, said control order to at least one actuator of said at least one controllable movable member,wherein:said control order is transmitted to said at least one actuator of said at least one controllable movable member, upon the determination of the existence of said activation conditions. 2. The method as claimed in claim 1, wherein, the vertical wind component is calculated according to the steps of: a1) measuring actual values of a plurality of parameters of the aircraft at said current position; anda2) calculating said vertical wind component according to said measured actual values. 3. The method as claimed in claim 2, wherein: in step a1), the measuring is carried out by:an inertial platform, with the measurements including vertical speed Vz of the airplane relative to the ground, angle φ of inclination of the wings of the airplane relative to horizontal, attitude θ of the airplane relative to the horizontal, and pitch rate q;an anemometric probe, with the measurements including speed Vtas of the airplane relative to air mass in which the airplane is traveling;an incidence probe, with the measurements including angle of incidence α of the airplane; anda sideslip probe, with the measurements including angle of sideslip β of the airplane; andin step a2), the vertical wind component is calculated according to the following expression, in which Wz is the vertical wind component:Wz=Vz+Vtas·(cos φ·cos θ·cos β·sin [α+(q·l/Vtas)]−sin θ·cos β·cos [α+(q·l/Vtas)]+sin β·cos θ·sin φ) in which l represents an algebraic distance between the incidence probe and the airplane center of gravity. 4. The method as claimed in claim 1, wherein said severity level corresponds: to a first level, when said deviation in vertical load is less than or equal to a first predetermined value;to a second level, when said deviation in vertical load is greater than said first predetermined value and less than a second predetermined value; andto a third level, when said deviation in vertical load is greater than or equal to said second predetermined value. 5. The method as claimed in claim 1, wherein in step b), the severity level of the vertical turbulence is determined according to two linear combinations of the vertical wind component of the wind and a derivative of the vertical wind component. 6. The method as claimed in claim 1, wherein in step b), the severity level of the vertical turbulence is determined according to a calculation based on two probabilities. 7. The method as claimed in claim 1, wherein in step c), said control order is calculated according to a linear combination of the vertical wind component and a derivative of the vertical wind component. 8. The method as claimed in claim 1, wherein in step d), the control order is transmitted to at least one of the following movable members of the airplane: a spoiler and an aileron; and at least one auxiliary control order that compensates for pitch moment generated by the control of said movable member is determined and transmitted to an elevator of the airplane. 9. A device for attenuating vertical turbulence encountered by an aircraft during flight, said device comprising: at least one controllable movable member configured to act on aircraft lift;wind determination device configured to determine a vertical wind component existing outside the aircraft at a current position of said aircraft;control unit configured to calculate, according to said determined vertical wind component, at least one control order for said at least one controllable movable member, said at least one control order controlling amplitude of vertical load generated on the aircraft by the vertical turbulence; andseverity level determination unit configured to determine, according to said determined vertical wind component, a severity level of the vertical turbulence existing outside the aircraft at said current position as a function of deviation in the vertical load between a load factor at equilibrium for the aircraft and a load factor resulting from the vertical turbulence,wherein:said control unit is further configured to transmit said at least one control order to at least one actuator of said at least on controllable movable member, andsaid control unit is additionally configured to determine existence of activation conditions based on verification of the severity level of the vertical turbulence and deviation between a value of the control order and a predetermined threshold level, and to transmit, upon determination of the existence of said activation conditions, said control order to said actuator of said controllable movable member. 10. The device as claimed in claim 9, wherein said wind determination device comprises: a set of measurement elements configured to measure actual values of a plurality of parameters of the aircraft at said current position; anda wind calculation unit configured to calculate said vertical wind component according to said measured actual values. 11. The device as claimed in claim 10, wherein said set of measurement elements comprises at least one inertial platform, at least one anemometric probe and at least one incidence probe. 12. The device as claimed in claim 11, wherein said set of measurement elements comprises at least one sideslip probe. 13. The device as claimed in claim 9, wherein said severity level determination unit, said calculation unit, and said calculation unit form part of an automatic piloting system of the aircraft. 14. The device as claimed in claim 9, wherein said at least one movable member is a spoiler. 15. The device as claimed in claim 9, wherein said at least one movable member is an aileron. 16. An aircraft, comprising the device of claim 9. 17. A method for attenuating vertical turbulence encountered by an aircraft during flight, the method comprising the steps of: a) determining, by a wind determination device, a vertical wind component existing outside the aircraft at a current position of said aircraft;b) determining, by a severity level determination unit, according to said determined vertical wind component, a severity level of the vertical turbulence existing outside the aircraft at said current position as a function of deviation in vertical load between a load factor at equilibrium for the aircraft and a load factor resulting from the vertical turbulence;c) calculating, by a control unit, according to said determined vertical wind component, at least one control order to control at least one controllable movable member configured to act on aircraft lift of the aircraft, said control order controlling amplitude of the vertical load generated on the aircraft by the vertical turbulence;d) determining, by said control unit, existence of activation conditions based on verification of the severity level of the vertical turbulence and deviation between a value of the control order and a predetermined threshold value; ande) transmitting, by said control unit, said control order to at least one actuator of said at least one controllable movable member,wherein:said control order is transmitted to said at least one actuator of said at least one controllable movable member, upon the determination of the existence of said activation conditions, andthe vertical wind component is calculated according to the steps of:a1) measuring actual values of a plurality of parameters of the aircraft at said current position by: an inertial platform, with the measurements including vertical speed Vz of the airplane relative to the ground, angle φ of inclination of the wings of the airplane relative to horizontal, attitude θ of the airplane relative to the horizontal, and pitch rate q;an anemometric probe, with the measurements including speed Vtas of the airplane relative to air mass in which the airplane is traveling;an incidence probe, with the measurements including the angle of incidence α of the airplane; anda sideslip probe, with the measurements including angle of sideslip β of the airplane; anda2) calculating said vertical wind component according to the following expression, in which Wz is the vertical wind component:Wz=Vz+Vtas·(cos φ·cos θ·cos β·sin [α+(q·l/Vtas)]−sin θ·cos β·cos [α+(q·l/Vtas)]+sin β·cos θ·sin φ) in which l represents an algebraic distance between the incidence probe and the airplane center of gravity. 18. A method for attenuating vertical turbulence encountered by an aircraft during flight, the method comprising the steps of: a) determining, by a wind determination device, a vertical wind component existing outside the aircraft at a current position of said aircraft;b) determining, by a severity level determination unit, according to said determined vertical wind component, a severity level of the vertical turbulence existing outside the aircraft at said current position as a function of deviation in vertical load between a load factor at equilibrium for the aircraft and a load factor resulting from the vertical turbulence;c) calculating, by a control unit, according to said determined vertical wind component, at least one control order to control at least one controllable movable member configured to act on aircraft lift of the aircraft, said control order controlling amplitude of the vertical load generated on the aircraft by the vertical turbulence;d) determining, by said control unit, existence of activation conditions based on verification of the severity level of the vertical turbulence and deviation between a value of the control order and a predetermined threshold value; ande) transmitting, by said control unit, said control order to at least one actuator of said at least one of the following movable members of the airplane: a spoiler and an aileron,wherein:at least one auxiliary control order, which compensates for pitch moment generated by said movable member, is determined and transmitted to an elevator mounted on a horizontal empennage of the airplane, with said auxiliary control order being proportional to the at least one control order transmitted to the at least one actuator of the spoiler or aileron, with each order calculated on a phase basis according to equalizing time movement between each moveable member. 19. The method as claimed in claim 18, wherein the control order is determined and superimposed on preexisting orders being transmitted to the actuators of the movable elements.