Patent ID: 7702429

Claim:
An electric flight control system for the control in terms of load factor of the elevators of an aircraft, said elevators being controlled by a control section that compels said elevators to take a deflection position dependent on an electrical signal δ mc representative of a controlled value of the angle of deflection δ m of said elevators, said system comprising: a first calculation section for calculating, on the basis of an electrical signal nzc representative of a controlled value of said load factor, a first electrical signal {dot over (γ)} c representative of a controlled value of the derivative, with respect to time, of the aerodynamic slope γ of said aircraft; a first constituent device, which: is configured to receive at its input said first electrical signal {dot over (γ)} c ; comprises a first protection section configured to maintain said first electrical signal {dot over (γ)} c between a first minimum value and a first maximum value; on the basis of said first electrical signal {dot over (γ)} c , determines at least a second electrical signal α c , representative of a corresponding controlled value of the incidence α, and a third electrical signal θ c , representative of a corresponding controlled value of the longitudinal attitude θ; comprises a second protection section configured to maintain said second electrical signal α c between a second minimum value and a second maximum value; and delivers at least said third electrical signal θ c to its output; and a second constituent device, which is configured to receive at its input at least said third electrical signal θ c or a fourth electrical signal θ d similar to said third electrical signal θ c ; comprises a third protection section configured to maintain said third or fourth electrical signal between a third minimum value and a third maximum value; and is configured to deliver at its output a fifth electrical signal which constitutes said signal δ mc , representative of the corresponding controlled value of the angle of deflection δ m of said elevators.