The establishment and analysis of the high-order error model of platform inertial navigation system in mobile conditions

摘要

In view of the high mobility and the complex track conditions of the cruise missile, this article studies the error propagation characteristics of the PINS-platform inertial navigation system-in the circumstances of great changes of the flight path when taking escape interception and etc., and points out that accelerometer's quadratic term error and course effect error have a great influence on the accuracy of the navigation, establishes a total of 39 error models on the error sources including the accelerometer's quadratic term error and course effect error. In order to evaluate the accuracy of this error model, this study designs multi-track stimulation experiment, and compares it with 33-order error model which does not take the accelerometer's quadratic term error and course effect error into consideration. The simulation results show that when the aircraft penetrates or avoids the flight, the established 39-order error model is more accurate than the 33-order error model.