METHOD TO IMPROVE ACCURACY OF PLATFORMLESS INERTIAL NAVIGATION SYSTEM

摘要

FIELD: instrument engineering.;SUBSTANCE: present invention relates to instrument-making and can be used in platformless inertial navigation systems (platformless INS). Method of improving accuracy of platformless INS is based on application of mathematical model of platformless INS errors. At that, estimation of corrections to output parameters of platformless INS and to calibration values of primary information sensors is carried out continuously. Estimate is generated using a Kalman filter by processing observations of geophysical invariants. Differences of signals are used as observations, which are proportional to calculated in platformless INS and known prior values of projections of vector of angular velocity of the Earth rotation on axis of inertial coordinate system.;EFFECT: technical result is higher accuracy of platformless INS in autonomous mode of operation based on data on angular velocity of rotation of the Earth.;1 cl, 1 dwg