Electrical flight control system for an airplane, with attitude protection on takeoff
First Claim
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1. An electrical system for control of an elevator aerodynamic surface (1) of an airplane in proximity to the ground, of the type including:
- a control member (2) actuated by the pilot of the airplane and associated with a position sensor (3) delivering an electrical signal representative of the angle of deflection of said elevator aerodynamic surface on the ground and of the desired attitude (θ
d) for the airplane in flight;
motor means (4) for control of said elevator aerodynamic surface (1); and
calculating means (6) mounted between said position sensor (3) and said motor means (4), receiving said signal delivered by said sensor (3) and delivering a control signal for said motor means (4) in order to impart, to said aerodynamic surface (1), a movement such that said aerodynamic surface, on the ground, reaches an angular position defined by the position of said control member or such that the airplane, in flight, reaches an attitude corresponding to said desired attitude,which includes;
generator means (7) for delivering an electrical signal representative of the actual rate of rotation of said airplane; and
attenuator means (8,11) for attenuating, in pitch-up, said control signal addressed by said calculating means (6) to said motor means (4), said attenuator means receiving said electrical signal representative of said actual rotation rate and exerting an attenuation as a function of the value of said electrical signal representative of said actual rotation rate.
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Abstract
According to the invention, attenuator means (8) are provided, making it possible to limit the rate of rotation of the airplane on takeoff, so as to avoid the tail of the airplane striking the ground and to reduce the dispersion of the rotation rates.
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Citations
8 Claims
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1. An electrical system for control of an elevator aerodynamic surface (1) of an airplane in proximity to the ground, of the type including:
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a control member (2) actuated by the pilot of the airplane and associated with a position sensor (3) delivering an electrical signal representative of the angle of deflection of said elevator aerodynamic surface on the ground and of the desired attitude (θ
d) for the airplane in flight;motor means (4) for control of said elevator aerodynamic surface (1); and calculating means (6) mounted between said position sensor (3) and said motor means (4), receiving said signal delivered by said sensor (3) and delivering a control signal for said motor means (4) in order to impart, to said aerodynamic surface (1), a movement such that said aerodynamic surface, on the ground, reaches an angular position defined by the position of said control member or such that the airplane, in flight, reaches an attitude corresponding to said desired attitude, which includes; generator means (7) for delivering an electrical signal representative of the actual rate of rotation of said airplane; and attenuator means (8,11) for attenuating, in pitch-up, said control signal addressed by said calculating means (6) to said motor means (4), said attenuator means receiving said electrical signal representative of said actual rotation rate and exerting an attenuation as a function of the value of said electrical signal representative of said actual rotation rate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electrical system for control of an aerodynamic surface of an airplane in proximity to the ground, with attitude protection on take-off to eliminate the risk of striking the ground with the tail of the airplane during take-off, said system comprising:
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a control member actuated by a pilot of the airplane and associated with a position sensor delivering an electrical signal representative of the angle of deflection of said aerodynamic surface on the ground; motor means for control of said aerodynamic surface; calculating means, coupled between said position sensor and said motor means, for receiving said electrical signal delivered by said position sensor and delivering a control signal for said motor means in order to impart, to said aerodynamic surface, a movement such that said aerodynamic surface, on the ground, reaches an angular position defined by the position of said control member; generator means for delivering an electrical signal representative of the actual rate of rotation of said airplane; attenuator means for attenuating said control signal, said attenuator means receiving said electrical signal representative of said actual rotation rate and exerting an attenuation as a function of the value of said electrical signal representative of said actual rotation rate; and inhibiting means making said attenuator means active only during take-off of said airplane.
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8. An electrical system for control of an aerodynamic surface of an airplane in proximity to the ground, with attitude protection on take-off to eliminate the risk of striking the ground with the tail of the airplane during take-off, said system comprising:
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a control member actuated by a pilot of the airplane and associated with a position sensor delivering an electrical signal representative of the angle of deflection of said aerodynamic surface on the ground; motor means for control of said aerodynamic surface; calculating means, coupled between said position sensor and said motor means, for receiving said electrical signal delivered by said position sensor and delivering a control signal for said motor means in order to impart, to said aerodynamic surface, a movement such that said aerodynamic surface, on the ground, reaches an angular position defined by the position of said control member; generator means for delivering an electrical signal representative of the actual rate of rotation of said airplane; and attenuator means for attenuating said control signal, said attenuator means receiving said electrical signal representative of said actual rotation rate and exerting an attenuation as a function of the value of said electrical signal representative of said actual rotation rate.
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Specification