STABILISED GYROCOMPASS SYSTEM Russian patent published in 2017 - IPC G01C19/38 G01C17/00 

FIELD: physics.

SUBSTANCE: stabilised gyrocompass system contains a vertical angular velocity sensor, a coordinate converter, and a yaw rate sensor consisting of the first integrator, the adjustable link and the second integrator, a closed loop of the stabilised gyrocompass system with the first pitching angles located at the output of the second integrator. The second output of the Earth rotational speed projection signal is inserted into the circuit of the stabilised gyrocompass system located between the adjustable link and the second integrator. A new closed loop of the derived calculation from the Earth's rotation speed projections is inserted into the stabilised gyrocompass system, and consists of the series-connected adders, an azimuth unit, a unit of filters and derivatives. The second circuit output of the stabilised gyrocompass system through the adder is connected with a new circuit of the derived calculation from the Earth's rotation speed projections. The filter parameters in the new circuit are set so that the useful output signal of the adder is independent from them. The unit of the derivatives is connected to the vertical angular velocity sensor, the azimuth unit output is an azimuth output of the stabilised gyrocompass system and is connected to the input of the coordinate converter. Two other input converters are connected to the first output circuit of the stabilised gyrocompass system and the course angle sensor, the output of the coordinate converter is the output of the stabilised gyrocompass system by course.

EFFECT: improved accuracy of the instrument azimuth generation and the object course, excluding the amplitude and phase distortion inserted by the filters.

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