Accession Number : ADD014873

Title :   Apparatus for Scanning a Rotating Gyroscope.

Descriptive Note : Patent, Filed 31 May 83, patented 11 Jun 85,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Moran, Robert D

Report Date : 11 Jun 1985

Pagination or Media Count : 6

Abstract : An apparatus comprising, inter alia, gyroscope feed-back circuitry which allow scanning the rotor magnet of a gyroscope disposed in an associated guided missile system so as to increase the seeker field thereof is disclosed. A signal from the cage coil of the gyroscope having an amplitude approximating a sine function of the angular position of the spin axis of the rotor magnet portion of the gyroscope with respect to the body axis of the associated guided missile is used to generate a constant amplitude drive signal for driving the precession coil of the gyroscope. Scanning, so as to drive the rotor magnet in a predetermined scan pattern is accomplished by phase shifting the signal from the cage coil as a function of its amplitude and then driving the precession coil with the aforementioned constant amplitude drive signal which is phased-locked to the phase shifted or processed cage coil signal.

Descriptors :   AMPLITUDE, ANGLES, CIRCUITS, COILS, DRIVES, FEEDBACK, FUNCTIONS, GUIDED MISSILES, GYROSCOPES, HOMING DEVICES, MAGNETS, PATTERNS, PHASE LOCKED SYSTEMS, PHASE SHIFT CIRCUITS, POSITION(LOCATION), PRECESSION, ROTATION, ROTORS, SCANNING, SIGNALS, SINE WAVES, SPINNING(MOTION)

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE