DYNAMIC CALIBRATION OF AN ACCELEROMETER TRIAD ON A TWO-AXIS TEST BED

摘要

Dynamic calibration mode of micromechanical accelerometer (MMA) triad with its distance from the oscillation center taken into account has been considered. During the testing process, the quasi-harmonic oscillations were set by the two-axis test bed. A method for integration of MMA outputs with those of the angular sensors of the two-axis test bed is proposed. The algorithm makes it possible to determine not only the coefficients of the mathematic model of the MMA error, the alignment errors of the test bed and of the angular sensors, but also the location of the accelerometer triad in a closed case of the inertial measurement unit (IMU). In addition, the use of the method for dynamic calibration of accelerometer can significantly shorten the time of testing.