CALIBRATION METHOD OF INERTIAL MEASUREMENT MODULE AS TO CHANNEL OF ACCELEROMETERS

摘要

FIELD: instrument making.;SUBSTANCE: when performing the calibration, inertial measurement module (IMM) is fixed on a low-accuracy rotary table platform. Rotary table platform is turned in the whole range of roll and pitch angles relative to a free-fall acceleration vector g with a fixed pitch. Readings of accelerometers and angles of rotation are fixed in each position. Mathematical model of each accelerometer is identified using numerical methods. Minimisation of total error in sensor readings is performed during identification process, at variation of scale displacements of sensors of rotation angles of the platform and angular displacements of rotation axes of the platform. Then, measurement basis of accelerometers is matched with IMM axes. The method does not limit the number and location of calibrated accelerometers comprised of IMM.;EFFECT: simpler design and higher accuracy.;1 dwg