A calibration technique for a laser gyro strapdown inertial navigation system
In the present system for the calibration of a laser gyro strapdown inertial navigation system on a low cost, two-gimbal test table, accelerometer scale factor and bias and accelerometer and gyro misalignments are calibrated by means of navigation frame acceleration measurements after each rotation. Weighted least squares equations are used to furnish instrument parameter measurements. The accelerometer scale factor, misalignment errors, and bias, tilt the navigation frame during the alignment period and give acceleration measurement errors after the rotations. The gyroscope scale factor and misalignment errors propagate through the attitude algorithms, tilting the navigation frame when the inertial navigation unit is rotated.
Ortung und Navigation
- Pub Date:
- Laser Gyroscopes;
- Strapdown Inertial Guidance;
- Least Squares Method;
- Space Communications, Spacecraft Communications, Command and Tracking