CORRECTION METHOD OF STRAP-DOWN INERTIAL NAVIGATION SYSTEM Russian patent published in 2015 - IPC G01C21/06 

FIELD: measurement equipment.

SUBSTANCE: invention provides use of signals corresponding to an angular speed of an object and a signal corresponding to earth speed of the object, and complexing of these signals and signals corresponding to linear accelerations, converted considering flight parameters of the object, and adaptive roll and pitch evaluation is performed by means of a Kalman filter in which an amplification coefficient is changed depending on current values of overload moduli, angular speeds and earth speed of the object. Correction intensity is adapted during operation to deviations of an apparent vertical from gravitational. Suppression of influence of apparent acceleration occurs, which is sufficient to provide necessary accuracy of roll and pitch evaluation. Due to the above, dependence of pendulum correction on type of movement of the object is weakened till the level allowing to use angular speed sensors and linear acceleration sensors of average and low accuracy, including of a micromechanical type.

EFFECT: improving navigation accuracy of moving objects.

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