METHOD OF INCREASING ACCURACY OF INITIAL ALIGNMENT OF STRAPDOWN INERTIAL SYSTEM Russian patent published in 2016 - IPC G01C23/00 

FIELD: information technology.

SUBSTANCE: invention, characterized as method of increasing accuracy of initial alignment of strap down inertial system (SDIS) during aircraft (AC) location at aerodrome, after initial alignment and transition SDIS in navigation mode, during AC location at aerodrome, combined processing of inertial calculation and external information, at least, from satellite navigation system (SNS), relates to inertial navigation and can be used in aircraft SDIS. Said information processing includes generating estimates of corrections to calibration values of primary errors SDIS and generating estimates of corrections to output parameters of inertial calculation. Combined processing of information further includes filtering obtained said estimates of corrections at conditions observability and reliability, wherein evaluation of corrections meets above criteria, and/or zero values for estimates, does not satisfy said criteria are introduced into the corresponding estimates of corrections to calibration values of primary errors SDIS and adjustments to estimates of inertial calculation output parameters, including orientation angles determined at stage of initial alignment, directly at moment of AC take-off from runway.

EFFECT: technical result is increase of accuracy of SDIS initial alignment.

3 cl