METHOD FOR CALIBRATING ANGULAR VELOCITY SENSORS OF GIMBALLESS INERTIA MEASUREMENT MODULE Russian patent published in 2012 - IPC G01C21/00 

FIELD: physics.

SUBSTANCE: gimballess inertia measurement module (GIMM) is mounted on a stand equipment which enables to set a near-horizontal angular velocity vector with a fixed direction in space. Using the stand equipment, the GIMM is turned successively on at least two directed axes in the base of the calibrated GIMM. Readings of the GIMM on the linear acceleration sensor (LAS) channel and readings of angular velocity sensors (AVS) are recorded during rotation. Angular velocity of the GIMM in the LAS base is determined from the LAS signals. By identifying a mathematical model for the AVS, AVS zero signals, the matrix describing scaling factors, cross coupling and orientation of axes of sensitivity of the AVS in the GIMM are determined. Automatic referencing of the axes of the AVS to the measurement base of the LAS is enabled.

EFFECT: simple procedure for calibrating AVS, considerable reduction of accuracy requirements for test equipment, wider range of coefficients determined when calibrating GIMM, the method places no restrictions on the number and arrangement of calibrated AVS in the GIMM.