Abstract
In order to weaken the error of inertial sensors and to improve assaulting precision of an air launched missile, the technology of neural networks was attempted to on-line calibration of Strapdown Inertial Navigation System (SINS). Aiming at the time-varied specialty of SINS on moving base, an input-output sample structure was proposed to treat the neural networks for calibrating and revising the error of inertial instrument. Consequently, when a missile was appending under the wing, the trained neural networks can be straightway used for automatic calibration in the free-flight phase; In order to resolve inconsistent measurement of gyroscopes and accelerometers when a missile was appending under the wing and in free-flight phase modes, the error angles between master and slave SINS were estimated in advance, then the input sample of neural networks can simulate the free-flight phase. As a result, the precision of inertial sensors can be greatly improved, and the simulation results indicate that the intelligent calibration method is feasible.
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