Stable subsynchronous drive system for gyroscope rotor

Details Stable subsynchronous drive system for gyroscope rotor Stable subsynchronous drive system for gyroscope rotor

1979-03-15

1982-02-02

Witkowski, Stanley J.

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318314, 318318, H02P 528, G05B 501

Patent

active

043141889

ABSTRACT:
The present invention concerns apparatus for precisely driving the rotors of precision gyroscopes such as small, flexure mounted rate of turn or inertial gyroscopes. The rotor is servo operated subsynchronously whereby a reference frequency generated by a spin frequency reference generator is synchronized with a precisely stable frequency standard, assuring the maintenance of constant rotor speed and permitting precisely calibrated gyroscope torquing. The gyroscope motor rotor is thus spun at a subsynchronous frequency so that the poles in the hysteresis ring are constantly rotating about the ring and their effect on average magnetic bias is averaged substantially to zero. Further, the drive motor is operated at peak efficiency because its excitation is automatically and closely adjusted to be just sufficient to generate only the necessary motor torque for subsynchronous operation.

REFERENCES:
patent: 3110853 (1963-11-01), Jones
patent: 3176208 (1965-03-01), Gifft
patent: 3206665 (1965-09-01), Burlingham
patent: 3331006 (1967-07-01), Strand et al.
patent: 3495152 (1970-02-01), Keiser et al.
patent: 3906319 (1975-09-01), Milligan
patent: 3950682 (1976-04-01), Dohanich, Jr.
patent: 4099107 (1978-07-01), Eder
patent: 4250442 (1981-02-01), McCammon

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