Geometrical instruments – Indicator of direction of force traversing natural media – Gyroscopically controlled or stabilized
Patent
1981-03-11
1983-06-14
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Gyroscopically controlled or stabilized
74 534, G01C 1944
Patent
active
043875130
ABSTRACT:
A two-gyro four-gimbal attitude sensing system having gimbal lock avoidance is provided with continuous azimuth information, rather than roll information, relative to the magnetic cardinal headings while in near vertical attitudes, thereby to allow recovery from vertical on a desired heading. The system is comprised of means (48) for stabilizing an outer roll gimbal (14) that is common to a vertical gyro (12) and a directional gyro (10) with respect to the aircraft platform (50) which is being angularly displaced about an axis substantially parallel to the outer roll gyro axis, and means (38) for producing a signal indicative of the magnitude of such displacement (62, 64) as an indication of aircraft heading. Means are provided to cause stabilization of the outer roll gimbal (14) whenever the pitch angle of the aircraft passes through a threshold prior to entering vertical flight and destabilization of the outer roll gimbal (14) upon passing through the threshold when departing vertical flight.
REFERENCES:
patent: 2941306 (1960-06-01), Uecker
patent: 2977806 (1961-04-01), Lane
patent: 3045356 (1962-07-01), Uecker
patent: 3069912 (1962-12-01), Faux et al.
patent: 3075729 (1963-01-01), Noxon
patent: 3455172 (1969-07-01), Burns
Bendix Pub. Two Gyro All-Attitude Control, Pub. #663.23, dated 3/21/66.
Haroian Harry N.
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
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