Improvements in or relating to a gyro-stabilized inertial navigation platform

摘要

979, 580. Gyroscopic apparatus. GENERAL PRECISION Inc. Nov. 5, 1962 [Nov. 7, 1961], No. 41788/62. Heading G1C. An inertial navigation system has the pitch gyro 16, roll gyro 17, azimuth gyro 19, and nuclerometers 21, mounted on members 13, 18, rigid with a shaft 20 so that they may rotate about a pitch axis in a member 11, itself rotatable about a roll axis in the fixed casing, movement about the pitch and roll axes being controlled by hydraulic servomotors. To move shaft 20 and its associated equipment in one direction about the pitch axis, fluid is supplied from a solenoid operated servo-valve through passages in the fixed casing to an annular groove 61, in a fixed insert 59, leading through opening 65 to a cylinder 66. A piston 67 and thus a rack 51 are moved to the right, the rack 51 having teeth engaging a gear on shaft 20 so that the latter is rotated. For rotating the shaft in the opposite direction fluid is supplied through groove 61a and opening 65a to a cylinder 66a, thus causing a rack 50 to move to the left. To rotate the member 11 about the roll axis hydraulic fluid is supplied to one or other of a pair of cylinders whose pistons actuate racks 25, 26 engaging a gear 23 cut around one end of member 11. The members 13, 18, are secured to shaft 20 by the flattened faces of pins in grooves in the members engaging flattened surfaces on the shaft.