SU139088A1 - Magnetic auto-limiting method for gyromagnetic compass errors - Google Patents

Description

Known methods of magnetic auto-limiting errors of a gyromagnetic compass prevent the transfer of incorrect readings of magnetic sensors to a gyro unit using a gyroscopic correction switch that disconnects the magnetic sensor from the gyrocompass when the angular velocity of the aircraft turns or turns. When the plane flies straight ahead or turns with small angular velocities of the magnetic sensors, such as rotational error, error due to the influence of the aircraft’s own magnetic fields (deviation) and others, will be completely transferred to the gyrocompass, distorting its readings.

The proposed method makes it possible to eliminate the transmission of any errors of magnetic sensors (including methodological errors) to the readings of the gyromagnetic compass, which is achieved by comparing the value of the horizontal component of the earth's magnetic field produced by the sensor element with its calculated value taken from the map. When the difference between them, more than acceptable, is reached, the sensitive element of the compass is automatically disconnected from the gyro unit, thus preventing the penetration of distorted information into the compass pointer.

The drawing shows a schematic diagram of the connection of a magnetic sensor to a gyro unit for the implementation of the proposed method.

The horizontal component of the earth's magnetic field produced by the magnetic sensor 1 is transmitted through switch 2 to the gyro unit 3 of the heading system. The output signal from sensor 1 also goes to the comparison device 4, where it is compared with the calculated value of 139088-2 by the horizontal component of the earth’s magnetic field generated by the converter 5. If the difference between the signals generated by sensor / and converter 5 is greater than acceptable, then time relay 6 is activated and the sensor is automatically disconnected from the gyrocompass. The converter 5 can operate from a software device 7 controlled by the navigation machine 8 or manually. The automatic disconnection of the sensor from the gyrocompass makes it possible to eliminate the penetration of errors on the pointer 9.

Subject matter

The method of magnetic auto-limiting errors of a gyromagnetic compass, characterized in that, in order to eliminate the influence of magnetic sensor faults on the readings of a gyromagnetic compass, the horizontal component of the earth’s magnetic field, produced by the sensor, is compared with the calculated value of the horizontal component of the earth’s magnetic field maps, and when the difference of readings is given, the sensitive element of the compass is disconnected from the gyro unit.