Two-point Calibration Accuracy Analysis Model of Inertial Navigation System

In order to meet the high-accuracy navigation requirements for naval ship navigation, the accuracy of two-point calibration of inertial navigation system of naval ships is quantitatively analyzed. Firstly, the basic principle of two-point calibration of inertial navigation system is described. Secondly, the influence model of measurement error and dynamic misalignment angle on the accuracy of two-point correction is deduced, and the explicit analytical solution is given. Finally, the simulation test is performed for the algorithm. The results show that the dynamic misalignment angle is the main influencing factor of the two-point correction of the inertial navigation system of the naval ships compared with the influence of the measurement error, and the influence magnitude is about 10-3 °/h when α = β = 1.