Systematic calibration for inertial instruments errors in laser gyro strapdown inertial navigation system

Presents the Kalman filtering calibration approach developed to calibrate inertial instrument errors in a laser gyro SINS using systematic measurements from the six position test on a fixed base, which includes estimating both laser gyro′s random drift errors and coupled error parameters in SINS system from systematic measurements from fixed based test by Kalman filter and comparing filtering results of two different position test and processing estimates of coupled error parameters and then computing calibration values of other inertial instrument errors and points out that the Kalman filtering calibration approach is simple and the test can be easily implemented using only a manual three axis orientation rotating table at high precision, and the advantages of the Kalman calibration approach being insensitive to both measurement noise and environment disturbance and being of high precision demonstrates both the feasibility and validity of the new calibration approach.