METHODS FOR DETERMINING THE VALUES OF ORIENTATION ANGLES DURING THE MOVEMENT OF THE AIRCRAFT AND CORRECTING THE VALUES OF ORIENTATION ANGLES Russian patent published in 2022 - IPC G01C21/20 

FIELD: aircraft technology.

SUBSTANCE: invention relates to the field of aircraft orientation systems, mainly unmanned aircraft and guided projectiles. The claimed methods for determining the values of the orientation angles during the movement of the aircraft and correcting the values of the orientation angles are that to determine the course and pitch angles in the radio navigation mode, the altitude and linear velocities found by the radio navigation part (RNP) of the navigation system and the deviation angles of the control aerodynamic surfaces of the aircraft are used. To determine the roll angle in this mode, the aircraft is periodically subjected to a test movement in a plane perpendicular to its longitudinal axis. At the time intervals corresponding to the test displacements, there are derivatives of linear velocities, which, after taking into account the acceleration of gravity, are recalculated into a semi-connected coordinate system (SCCS). The ratio between the values of the acceleration projections on the vertical and transverse axes of the SCCS is used to determine the roll angle. The angles of course, pitch and roll obtained on the basis of the RNP data are used to correct the results of calculations of the same angles using the inertial part (IP) of the navigation system.

EFFECT: increase in the accuracy of setting the initial conditions when restarting the calculation of course, pitch and roll angles in the inertial mode of operation of the navigation system due to correction and, as a result, an increase in the duration of the aircraft’s operation in this mode without reducing the probability of completing the flight task.

12 cl, 1 dwg