Device for determining the north direction

Details Device for determining the north direction Device for determining the north direction

1976-10-08

1978-02-28

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Gyroscopically controlled or stabilized

G01C 1938

Patent

active

040757641

ABSTRACT:
A highly-amplified pickoff signal responding to positional deviations of a wire-suspended gyro are fed to a torquer connected to the gyro. In response to these the torquer exerts on the gyro a torque counteracting the gyro directing torque. The pickoff signals are sampled at time internals T and an analogue-digital converter produces therefrom a timed sequence of digital signals with each digital signal being proportioned to the pickoff signal at a time of sampling. This sequence of digital signals are fed to a digital filter which produces an output signal, indicative of the deviation, in accordance with the equation:

REFERENCES:
patent: 3750300 (1973-08-01), Tumback

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