The Design of an Effective Marine Inertial Navigation System Scheme

Accuracy of marine inertial navigation system (INS) is mainly dominated by gyroscope. In this paper, a new scheme (inertial gyrocompass system) is designed to realize high accuracy INS on the basis of low accuracy float gyros and velocity information of Doppler log. By choosing optimal 2-order horizontal damping network and 1-order azimuth damping network and designing logical damping parameter, the positioning error caused by gyro drift can be eliminated to a large extent. Computer simulation and experimentations show this scheme is effective and practicable.