IMPROVED PRECISION INERTIAL NAVIGATION SYSTEM

摘要

The invention relates to an inertial navigation system for a carrier comprising a heart comprising gyroscopic sensors making it possible to determine its angular speed along three axes defining a reference trihedron, two of the axes defining a reference plane and the third axis being perpendicular to this. plan. The device comprises command and control means making it possible to set the heart in rotation around the third axis and to determine the direction of geographic north from the information supplied by the gyroscopic sensors and by an accelerometer placed in the reference plane; the rotation of the heart being carried out with a period for which the value of the Allan variance of the stability error of the gyroscopic sensors is less than a given value guaranteeing the precision with which the direction of geographic north can be known.