Abstract: Disclosed are a method and system for improving real-time determination of flight parameters of an aircraft during flight. A selection module selects and delivers measured values of input parameters to an estimation unit, and the estimation unit uses the input parameters to estimate at least two selected flight parameters. The input parameters are received by the estimation unit on the basis of identified flight mechanics equations associated with the selected flight parameters. The estimation unit includes an extended Kalman filter, which is configured to receive the values of the input parameters and to output joint estimations of the selected flight parameters based on the flight mechanics equations, during the flight of the aircraft.

Abstract: A process and device for optimising the performance of an aircraft in the presence of a lateral dissymmetry is disclosed. The device (1) includes means (2, 3, 4, 5, 7, 9) for controlling, during a lateral dissymmetry, at least one rudder such as to generate an optimum sideslip for reducing the drag of the aircraft.

Abstract: Method and device for detecting an erroneous speed generated by an air data inertial reference system. The device can be configured to detect an erroneous speed provided by an air data and inertial data system and to generate a substitution speed.

Abstract: The device (1) includes means (2, 3, 4) for observing the overall conditions of the aircraft and for determining whether the lateral behavior thereof is normal.

Abstract: According to the invention, the system for determining, in real time, flight parameters of an aircraft, in the course of a flight of the latter, comprises an extended Kalman filter (10) which is configured on the basis of flight mechanics equations establishing a dependency relationship between at least two preselected flight parameters of said aircraft to be estimated and which is formed so as to deliver, during a flight of said aircraft, joint estimations of said selected flight parameters.

Abstract: Method and device for detecting an erroneous speed generated by an air data inertial reference system. The device (1) comprises means (2) for detecting an erroneous speed provided by an air data and inertial data system (3) and means for generating a substitution speed.

Abstract: A process and device for optimising the performance of an aircraft in the presence of a lateral dissymmetry is disclosed. The device (1) includes means (2, 3, 4, 5, 7, 9) for controlling, during a lateral dissymmetry, at least one rudder such as to generate an optimum sideslip for reducing the drag of the aircraft.

Abstract: The device (1) includes means (2, 3, 4) for observing the overall conditions of the aircraft and for determining whether the lateral behaviour thereof is normal.