Machine element or mechanism – Gyroscopes – Gyroscope control
Patent
1979-06-13
1981-09-22
Bonck, Rodney H.
Machine element or mechanism
Gyroscopes
Gyroscope control
74 56E, G01C 1930
Patent
active
042903165
ABSTRACT:
A two degree-of-freedom, free-rotor, gas-bearing gyroscope having greatly reduced sensitivity to acceleration-induced and other disturbances. An electromagnetic forcer acts on the rotor to keep the axial component of bearing deflection negligible. Closed-loop control circuitry for energizing the axial forcer responds to a linear displacement signal. The circuitry also provides an output signal proportional to the component of acceleration along the spin axis. This signal may be used to replace an accelerometer output signal in navigation equipment. In addition to be being functional during normal operation, the control functions during start-up and shut-down to center the rotor over the support ball. The functions of forcer and torquer are combined in a single structure. A dual motor arrangement and a dual forcer-torquer arrangement provide cancellation of bias variations due to housing, shaft, and bearing deflections. The ball support shaft has larger diameter and the gas fill pressure is lower than would be feasible in the absence of the electromagnetic axial forcing.
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Albertson Michael D.
Fuller Alfred B.
Gall Chester E.
Noar Raymond
Pointer Carl W.
Bonck Rodney H.
Friedman Gilbert H.
Hamann H. Fredrick
Rockwell International Corporation
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