Machine element or mechanism – Gyroscopes – Gyroscope control
Patent
1984-12-17
1986-09-23
Bonck, Rodney H.
Machine element or mechanism
Gyroscopes
Gyroscope control
74 56D, 74 56E, G01C 1928, G01C 1930
Patent
active
046128190
ABSTRACT:
In a dry tuned gyro, two pairs of coils 44 having ferromagnetic cores 46 are provided as torquers, which act on a ferromagnetic gyro rotor 36. The coils 44 are each angularly offset by 90.degree.. Opposite coils 44 are energized in opposite directions by a direct-current signal and provide a torque. Due to the core 46 only low currents are required for that. The coils 44 are supported on sensors 48, which respond to forces of reaction. The sensors 48 include crystal oscillators and supply a torque signal in the form of a frequency. Simultaneously alternating currents are applied to the pairs of coils 44 and act as position pick-offs as well due to the variation of the inductivities. The pick-off signal from one of the pairs of coils 44 controls the direct-current signal for the other pair, and vice versa.
REFERENCES:
patent: 2746301 (1956-05-01), Henderson
patent: 2964952 (1960-12-01), Hoover et al.
patent: 3107540 (1963-10-01), Curriston
patent: 3147627 (1964-09-01), Hunn
patent: 3241377 (1966-03-01), Newton
patent: 3267746 (1966-08-01), Scotto
patent: 3438270 (1968-04-01), Binder et al.
patent: 3475971 (1969-11-01), Binder et al.
patent: 4487083 (1984-12-01), Quermann
Tietze and Schenk, "Halbleiter-Schaltungstecknik" Springer-Verlag, 2nd edition, pp. 367-372.
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