Method for calibrating accelerometer units in strapdown inertial combinations

The invention discloses a method for calibrating accelerometer units in strapdown inertial combinations which stand still at 18 positions, all coefficients in error models of the accelerometer units in the strapdown inertial combinations are calculated according to pulse output values within a certain period of measurement time, so as to finish calibration of the accelerometer units. Compared with other error coefficient calibration methods, the method has the advantages that error coefficient calibration of three axis accelerometers of the strapdown inertial combinations is finished, and calibration of second-order error coefficients of the accelerometers is achieved. Thus, not only is the calibration accuracy of the error coefficients improved, but also the calibration process is simple and required time is short.