Using the rotor angular velocity change mode to increase the latitude gyro accuracy

Navigation of moving objects using inertial navigation systems is impossible without knowing the geographical coordinates of the starting point. It is possible to solve the problem of determining the latitude and longitude of a place using astronomical navigation methods and methods using the global positioning system. The disadvantages of these methods include the following: the former are significantly dependent on weather conditions, while the latter are not autonomous. These shortcomings are deprived of a gyroscopic device - latitude gyro, which is a two-degree gyroscope, the principle of operation of which is as follows. If the axis of the gyromotor suspension is installed in a horizontal plane (this requires a gyroscopic vertical) in the direction “west-east” (this requires a heading gyro), the axis of rotation of the rotor latitude gyro is set along an axis parallel to the axis of rotation of the Earth. The angle between the specified axis and the North direction represents the latitude of the location of the instrument. It is indicated that the presence of a constant uncontrolled harmful moment around the axis of the gyromotor suspension leads to an error in determining the latitude of the place and constructive ways to deal with this error are indicated.