Bracket calibrating and compensating method of inertial system

The invention belongs to the technical field of inertia, and relates to a bracket calibrating and compensating method of an inertial system, which is used for the navigation and the positioning of aviation, spaceflight, navigation and continental rise. The bracket calibrating and compensating method of the inertial system adopts a way of an external compensator which is independent from the inertial system; some parameters which are relevant with a carrier are placed in the external compensator once; and in a normal working process, the inertial system can directly extract data from the inside of the external compensator, thereby omitting lots of leveling time and leveling work. Some parameters (such as a pitching mounting error, a transverse rolling mounting error, the magnetic deviationdata of a magnetic sensor and the like) which are relevant with the carrier or a bracket are placed in the external compensator quite reliably; the problem that the parameters which are relevant withthe carrier are lost after the inertial system on the carrier goes wrong or the inertial system is replaced; and when the inertial system goes wrong, the parameters of the pitching mounting error andthe transverse rolling mounting error of the inertial system, the magnetic deviation data of the magnetic sensor and the like are still stored in the external compensator.