Boots – shoes – and leggings
Patent
1993-03-23
1996-11-12
Chin, Gary
Boots, shoes, and leggings
364454, 36457102, 73178R, G06F16500
Patent
active
055746500
ABSTRACT:
A method and apparatus for minimizing the effect of lateral velocity transients upon an aircraft inertial instrument calibration process of the type in which cross-track velocity is measured and utilized to correct for the east component of gyro bias error. A "cross-track position" value is obtained by integration of the cross-track velocity. A Kalman filter calculates a plurality of gain values corresponding to measurements of crab angle, lever arm, north and east velocity, heading angle and rate of change of heading angle and those gain values are applied to the cross-track position value to obtain error values for each of such parameters. The calculated error values are then employed as corrections to, or calibrations of, the inertial instrument outputs.
REFERENCES:
patent: 3702477 (1972-11-01), Brown
patent: 4032759 (1977-06-01), Danik
patent: 4212443 (1980-07-01), Duncan et al.
patent: 4303978 (1981-12-01), Shaw et al.
John W. Diesel, "Calibration of a Ring Lawer Gyro Inertial Navigation System For Minimum Velocity Error," Fourteenth Biennial Guidance Test Symposium, Central Inertial Guidance Test Facility, Guidance Test Division, 6585th Test Group, Holloman AFB, vol. II (Oct. 3-5, 1989), pp. 1-1 through 1-20.
Chin Gary
Kramsky Elliott N.
Litton Systems Inc.
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