METHOD FOR INDEPENDENT ALIGNMENT OF AN INERTIAL UNIT FOR AN ONBOARD INSTRUMENT OF AN AIRCRAFT

摘要

The invention relates to a method for the independent alignment of an inertial unit for a backup instrument in an aircraft. According to the invention, the method comprises the following steps: determining a condition of the aircraft, i.e. whether the aircraft is flying or not; in the case the aircraft is flying, carrying out a flight alignment (52); in the case the aircraft is not flying, determining the stability of the aircraft, i.e. whether the aircraft is on the ground or at sea; in the case the aircraft is on the ground, carrying out a ground alignment (54); in case the aircraft is at sea, carrying out a sea alignment (55). The invention is advantageous in that it allows for an alignment with the same precision independently from the conditions in which the aircraft may be, the alignment being adapted to said conditions.