Seeker

Details Seeker Seeker

1989-08-18

1990-11-27

Steinberger, Brian S.

Aeronautics and astronautics

Missile stabilization or trajectory control

Automatic guidance

F41G 700

Patent

active

049730134

ABSTRACT:
A seeker having a gyroscopic spin stabilized optical arrangement adapted to gimbal relative to a body in response to a current fed to a precession coil by a processor. Gimballing action of such optical arrangement within the body is measured by a voltage induced in a cage coil. The precession coil and cage coil are mounted adjacent to each other. The seeker includes a cage coil compensator comprising a differencing network and a differentiator. Changes in the current fed to the precession coil induces unwanted voltage in the adjacent cage coil. The differentiator is fed by the current in the precession coil to produce a voltage related to the rate of change in the current in the precession coil and hence, related to the undesired voltage induced in the cage coil. The differencing network is fed by the voltage produced by the differentiator and the total voltage induced in the cage coil to subtract from such total voltage the undesired portion thereof induced therein by the adjacent precession coil. With such arrangement, cancellation of the undesired voltage induced in the cage coil is provided by an electronic circuit thereby eliminating the requirement of an additional caging cancellation coil.

REFERENCES:
patent: 3504869 (1970-04-01), Evans et al.
patent: 3872308 (1975-03-01), Hopson et al.
patent: 4542870 (1985-09-01), Howell

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