METHOD FOR DETERMINING OF ADJUSTMENT CORRECTIONS IN THE STRAP DOWN INERTIAL NAVIGATION SYSTEM Russian patent published in 2018 - IPC G01C21/02 

FIELD: navigation systems.

SUBSTANCE: invention relates to the field of corrected inertial navigation systems and can be used in the integrated navigation systems development. Method for determining of adjustment corrections in the strap down inertial navigation system, where to correct the strap down inertial navigation system the astroinertial information from the astroinertial navigation system is used, as well as position and speed information from the satellite navigation system. At that, during the astro-information formation process, a star is selected from the to be sighted stars catalog, available to sighting at a given moment of time at a given location of the object, its sighting with the determination of two angular corrections by calculating the difference between the calculated and actual angles of the star's sighting by bearing and the difference between the calculated and actual angles of its sighting by the elevation. Based on the received positional and speed information on the basis of the dynamic group of the corrected system error equations, its positional error, speed error and the vertical line construction error are calculated, by the set of errors, the system kinematic errors vector horizontal projections onto the local horizon plane are determined, then, by the astroinertial information obtained in the form of angular corrections and the kinematic errors vector horizontal projections, its vertical projection is calculated, horizontal and vertical projections are recalculated into the kinematic errors vector, after which instrumental errors such as the gyroscopes uncompensated drifts are determined by its speed.

EFFECT: development of the adjustment corrections determining method in the strap down inertial navigation system, free from said shortcomings by using the SNS supplied positional and speed information, and astro-information, supplied by means of an astro-system, and also significantly increases the correction making reliability.

1 cl, 14 dwg