Patent ID: 7188008

Claim:
A system for supervising the speed of at least one engine of an aircraft, said system comprising, a first and a second information source determining first and second values of at least one predetermined aerodynamic parameter of the aircraft; and at least one unit for supervising said engine, comprising: at least one regulation means for acting on the speed of the engine as a function of control orders received; at least one sensor which is able to measure a fourth value of said aerodynamic parameter, on said engine; and a computation unit which is connected to said first and second information sources, to said regulation means and to said sensor, which receives said first, second and fourth values of said aerodynamic parameter, which takes them into account so as to select a value of said aerodynamic parameter as control value, and which uses the control value thus selected at least to determine a control order which is transmitted to said regulation means, wherein said system furthermore comprises: a third information source determining a third value of said predetermined parameter; and an information transmission network, to which are linked said first, second and third information sources and said computation unit allowing transmission of information between said first, second and third information sources and said computation unit; said first, second and third information sources are independent of one another; said first, second and third information sources respectively determine first, second and third correctness information indicating the correctness respectively of said first, second and third values of said aerodynamic parameter; and said computation unit selects said control value by using said first, second, third and fourth values of the aerodynamic parameter, as well as said first, second and third correctness information.