Abstract:

The non-complete compensated calibration errors of an accelerometer can remain in initial alignment stage and lead to horizontal misalignments. A new approach is presented to calibrate accelerometer bias and fix error angle based on Kalman filter in initial alignment. Based on the analysis of horizontal misalignments, an accelerometer calibration error model is derived, and a four-step-ten-position calibration scheme is given. The optimal calibration path is analyzed, and its effectiveness is proved by simulation. The result shows that this method can further compensate the residual calibration errors with horizontal misalignments, thus improving accelerometer calibration accuracy.