Two-axis optical inertial system using a gyro rotor as a stable

Details Two-axis optical inertial system using a gyro rotor as a stable Two-axis optical inertial system using a gyro rotor as a stable

1983-08-01

1987-05-05

Punter, William H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356149, 356152, G02B 2764, G01C 100

Patent

active

046627278

ABSTRACT:
The present invention provides a two-axis optical inertial reference system wherein the rotor (12) of a gyro (10) is utilized as a stable reference. A surface (19) of the rotor is made reflective. Sighting on the reference is provided through a window (18) in the gyro case, (16) to access rotor reflective surface (19) the gyro case being hard mounted to a moving surface in the coarse gimbal of the system, since the gyro rotor has a finite angle of travel with respect to the case. A stabilized inertial platform (gyro rotor (12)) is achieved without the need of intermediate servoed gimbals. The gyro torquers are used to precess the rotor's spin axis to provide a means for slewing the spin axis and, hence, the optical system's line-of-sight (60) to the desired direction of the optical system. Specific embodiments for obtaining the required reference beam are disclosed.

REFERENCES:
patent: 2432613 (1947-12-01), Fedde
patent: 3326619 (1967-06-01), Johnson et al.
patent: 3522993 (1970-08-01), Gabriet
patent: 3684383 (1972-08-01), Johansson
patent: 3989942 (1976-11-01), Waddoups
patent: 4108551 (1978-08-01), Weber
patent: 4144505 (1979-03-01), Angelbeck et al.
patent: 4173414 (1979-11-01), Vauchy et al.
patent: 4270044 (1981-05-01), Elwell, Jr.
patent: 4326800 (1982-04-01), Fitts

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