Abstract: The present method includes a first step of obtaining first values of compensation coefficients for magnetic anomalies of the magnetometer, and a second step of in-flight refining including: a) an acquisition of a plurality of magnetic field vector values and associated aircraft attitude angle values; b) a calculation of a magnetic heading as a function of the first values of the compensation coefficients and values of magnetic field vector; c) a recursive calculation of a slope coefficient, as a function of a difference in heading between the calculated magnetic heading and a reference magnetic heading, and of values for aircraft attitude angles; and d) a calculation of a value of compensation coefficient for vertical magnetic anomalies using a vertical bias estimator as a function of the slope coefficient, aircraft attitude angle values, and local terrestrial magnetic field values.

Abstract: The present invention relates to a method for self-testing an angle-of-attack probe comprising the steps of controlling an angular excitation of a rotary element that is rotatable about its equilibrium position according to known excitation characteristics; acquiring angular measurements relating to the rotation of the rotary element, determining a parasitic torque applied to the rotary element on the basis of the angular measurements and of the excitation characteristics; comparing at least one component of the parasitic torque with at least one predetermined threshold and detecting an operating fault in the probe when said component exceeds the predetermined threshold.

Abstract: A method for estimating the harmonization values of a magnetometer installed in a mobile machine, said magnetometer being associated with its reference coordinate system XM, YM, ZM, said method, implemented by an electronic device, comprising acquiring magnetic field values measured by the magnetometer and determining the horizontal harmonization (hx, hy) by: estimating a first angle equal to the angle between XM and the large axis of an ellipse, defined in the plane comprising the two axes XM, ZM, by said acquired field values; determining hy as being equal to said first estimated angle, estimating a second angle equal to the angle between YM and the large axis of an ellipse defined, in the plane comprising the two axes YM, ZM, by said acquired field vector values; and determining—hx as being equal to said second estimated angle.

Abstract: A method for estimating the harmonization values of a magnetometer installed in a mobile machine, said magnetometer being associated with its reference coordinate system XM, YM, ZM, said method, implemented by an electronic device, comprising acquiring magnetic field values measured by the magnetometer and determining the horizontal harmonization (hx, hy) by: estimating a first angle equal to the angle between XM and the large axis of an ellipse, defined in the plane comprising the two axes XM, ZM, by said acquired field values; determining hy as being equal to said first estimated angle, estimating a second angle equal to the angle between YM and the large axis of an ellipse defined, in the plane comprising the two axes YM, ZM, by said acquired field vector values; and determining—hx as being equal to said second estimated angle.

Abstract: A control system for an actuator including a straight slot direct current motor comprises a position sensor for measuring the angular position (?) of the motor and a current sensor for measuring the current strength (Im) in the motor, but not having a sensor for measuring the angular rotation speed of the motor.

Abstract: A control system for an actuator including a straight slot direct current motor comprises a position sensor for measuring the angular position (?) of the motor and a current sensor for measuring the current strength (Im) in the motor, but not having a sensor for measuring the angular rotation speed of the motor.