Position reference devices

Details Position reference devices Position reference devices

1975-11-07

1977-07-12

Pendegrass, Verlin R.

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

244 32, 73516LM, G01P 1502

Patent

active

040349373

ABSTRACT:
The invention provides an angular position reference device for measuring changes in the attitude of a moving body and comprising a closed chamber filled with a liquid and rotatable about an axis by drive means, and position sensing means such as a vane assembly mounted within the chamber for rotation with the liquid independently of the chamber about an axis co-axial with the chamber axis and which, with the liquid, defines a reference position fixed in space in a plane normal to said axis, and which co-operate with the chamber to define a datum position of the chamber relatively to the reference position, in use, rotation of the chamber about said axis tending to cause relative rotation between the chamber and the liquid from said datum position which is sensed by the position sensing means which produces an output proportional to said rotation, said output so controlling the drive means to rotate the chamber to return the chamber to the datum position and, in use, providing a measure of a change in the position of a body to which the device is connected about said axis relatively to the reference position.

REFERENCES:
patent: 2370000 (1945-02-01), Best
patent: 2949782 (1960-08-01), Stedman
patent: 3564928 (1971-02-01), Slater et al.
patent: 3948107 (1976-04-01), Asmar et al.

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