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Electrical flight control system for an airplane, with attitude protection on takeoff

  • US 5,527,002 A
  • Filed: 09/29/1994
  • Issued: 06/18/1996
  • Est. Priority Date: 10/14/1993
  • Status: Expired due to Term
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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