The Principle of Northfinder

The inertial navigation system uses the triaxial fiber optic gyro-sensitive carrier angular motion to output a digital signal proportional to the angular velocity of the carrier motion; the linear acceleration of three orthogonally-configured quartz accelerometer-sensitive carriers outputs a proportional current signal The current signal is converted to a frequency signal input to the navigation computer via the I/F conversion circuit. The navigation computer completes the data reception of gyroscopes, accelerometers, and external GPS, calculates the system error compensation, and solves the navigation, and sends out real-time navigation information such as speed, position, and attitude through the monitoring interface in a specified cycle.

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