Inertial instrument

Details Inertial instrument Inertial instrument

1979-04-02

1980-07-29

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

33326, 74 54, 74 57, 364447, G01C 1908, G01C 1934, G01C 1942

Patent

active

042144825

ABSTRACT:
Disclosed is apparatus and method for accurately determining the direction of true north or the change in drift of other gyroscopes. The apparatus comprises a single degree of freedom gyroscope driven by a permanent magnet electric motor. The gyroscope rotor is spun by the motor at varying speeds and the torque required to maintain the rotor at a null orientation is measured and recorded. The measured torques are processed to produce an accurate indication of true heading or to indicate the change in the level of drift of other gyroscopic instruments.

REFERENCES:
patent: 3603161 (1971-09-01), Schwarz
patent: 3611815 (1971-10-01), Fischell
patent: 3664199 (1972-05-01), Lahde
patent: 3753374 (1973-08-01), Strassburg
patent: 3858328 (1975-01-01), La Rose
patent: 3925643 (1975-12-01), Roantree et al.

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