METHOD FOR INCREASING ACCURACY OF CALIBRATION OF SCALING COEFFICIENTS AND ANGLES OF NON-ORTHOGONALITY OF SENSITIVITY AXES OF SENSOR UNIT OF ANGULAR VELOCITY SENSORS

摘要

FIELD: physics.;SUBSTANCE: invention relates to navigation, navigation instruments, testing and calibration, and can be used for calibration of sensors of strapdown inertial systems of orientation and navigation of aircraft, sea, ground and other mobile objects. Method includes initial platform display, static experiment at fixed platform position, rotation with the help of bench equipment in series on at least two non-parallel axes in the calibrated integrated data base basis, during rotation, recording of the integrated data base readings on the linear acceleration sensors (LAS) channel, the angular velocity sensors (AVS) readings, identifying the AVS mathematical model, determining the AVS zero signals, the matrix describing the scale factors, cross-links, developing a calibration process automation program, which includes performing a sequence of rotations and platform slopes at angles in accordance with 6 of the following experiments with duration of time interval with each rotation and inclination of about 3–4 minutes, processing of obtained data, including selection of time interval with duration of about 2-3 minutes with steady angular velocity and inclination angles, calculation of ADC AVS codes average values, differentiation of readings of goniometers and calculation of average values of angular velocities of table platform, calculation of average values of readings of temperature sensors and, using certain algorithms, calculation of calibration coefficients.;EFFECT: technical result is high accuracy of calibration of scaling coefficients and non-orthogonality angles due to invariance to current offsets of zero signals.;1 cl, 3 tbl