An Improved Attitude Compensation Algorithm for SINS/GNS Integrated Navigation System

In order to suppress the error caused by the drift of the gyroscope and further improve accuracy of the navigation system, combined with the method of measuring attitude by using the three-axis components of geomagnetic, a new scheme, consisting of Strapdown Inertial Navigation System (SINS)/Geomagnetic Navigation System (GNS), is designed for autonomous integrated navigation systems. The principle of this SINS/GNS integrated navigation system is explored, and the corresponding mathematical model is established. Furthermore, a Marginalized Particle Filter (MPF) is designed for this autonomous integrated navigation system. The simulation experiments are conducted, and the results show that the improved SINS/GNS autonomous integrated navigation system possesses strong robustness and high reliability, thus providing a new reference solution for autonomous navigation technology.