Electronically commutated two-axis gyro control system

Details Electronically commutated two-axis gyro control system Electronically commutated two-axis gyro control system

1994-05-11

1996-09-24

Wysocki, Jonathan

Electricity: motive power systems

Torquing motors

74 56D, G05B 1700

Patent

active

055594174

ABSTRACT:
A two degree of freedom gyroscope having a drive motor (20), with a permanent magnet rotor (22), which includes an optical sensor (11) for providing an X-axis signal and a Y-axis signal which are indicative of the displacement of the actual rotor (22) spin axis from the null spin axis (28), a torquer coil (26) looped around the permanent magnet rotor (22) and disposed in a plane orthogonal to the null spin axis, and torquer drive elements (52, 54, 56) responsive to the X-axis and Y-axis signals induced in the sensor when the actual rotor (22) spin axis is displaced form the null spin axis (28) for providing current to said torquer coil (26) to urge the axes to coincide. A voltage induced in an open phase of a two phase motor stator is used to provide the instantaneous position of the rotor poles to obtain correct phasing information for commutation of the single polar torquer.

REFERENCES:
patent: 4694210 (1987-08-01), Elliott et al.
patent: 4743815 (1988-05-01), Gee et al.
patent: 5182499 (1993-01-01), Inaji et al.
patent: 5235264 (1993-08-01), Kaneda et al.
patent: 5313148 (1994-05-01), Sears et al.

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