INTEGRATED STRAP-DOWN ASTRO-INERTIAL NAVIGATION SYSTEM Russian patent published in 2018 - IPC G01C21/02 

FIELD: navigation.

SUBSTANCE: invention relates to corrected inertial navigation systems and can be used for development of integrated navigation systems, in which the main navigation information supplied by strapdown inertial navigation systems (SDINS), is corrected by positional and speed information supplied by satellite navigation system (SNS), and by the angular information supplied by the astrosystem. Astro-inertial navigation system comprises a system for determining corrections of the strapdown inertial navigation system and sources of external information, signals from which are used as input information for determining corrections. Source of astroinformation is used as the first source of external information, and the first source of external information comprises a teleblock installed within the cardan suspension, which provides the teleblock arrangement at specified angles in azimuth and altitude, block of tracking systems for adjusting pointing angles of the teleblock's sighting axis, an on-board digital computer system, according to the target indications of which, the tracking systems adjust these angles and also a unit for calculating the angular corrections. Source of speed and positional information is used as a second source of external information, and the system for determining the corrections of the strapdown inertial navigation system is three-staged and comprises a sequentially connected positional error, velocity error and vertical construction error block, inputs of which are connected to the on-board digital computer system and the speed and position information source, block for determining the vertical projection of the vector of kinematic errors of the system, as well as a unit for determining instrumental errors of the system.

EFFECT: increased accuracy of SDINS error detection, as well as higher reliability of its operation, by using the positional and speed information supplied by the SNS, as well as astroinformation supplied by the astrosystem means.

1 cl, 16 dwg