Abstract

The paper discusses the structure, algorithms and testing results for a hybrid precision strapdown inertial navigation system (SINS) which is resistant to fast extreme impacts. Impact resistance of the precision SINS is provided by incorporating an auxiliary strapdown inertial attitude control system (SIACS) based on rough sensors that can endure fast extreme shocks without losing the attitude accuracy; and by post-processing of inertial sensors data performed in the onboard computer simultaneously with the main navigation task. The post-processing procedure is designed to identify the moment of shock occurrence and to repeat the attitude problem solving in the onboard computer based on the auxiliary SIACS data within the time interval of exposure to the extreme shock. In the absence of shocks, the auxiliary SIACS is calibrated in accordance with the data of the main precision SINS. The main precision SINS is based on precision fiber-optic gyros (FOG) and the auxiliary SIACS—on micromechanical gyros (MMG). Thus, a hybrid-type precision SINS has been constructed, which has demonstrated required accuracy level during on-ground vehicle tests, including shock tests.

中文翻译：

---

用于地面应用的防震精确捷联惯性导航系统开发

摘要

本文讨论了一种可抵抗快速极端撞击的混合式精确捷联惯性导航系统（SINS）的结构，算法和测试结果。通过结合基于粗糙传感器的辅助捷联惯性姿态控制系统（SIACS）来提供精密SINS的耐冲击性，该系统可以承受快速的极端冲击而不会损失姿态精度；通过对惯性传感器的数据进行后处理，在船上计算机中执行与主要导航任务同时进行的数据。后处理过程旨在识别发生冲击的时刻，并在暴露于极端冲击的时间间隔内根据辅助SIACS数据在车载计算机上重复解决姿态问题。在没有冲击的情况下 辅助SIACS根据主要精度SINS的数据进行校准。主要的精密SINS基于精密光纤陀螺（FOG）和辅助SIACS-基于微机械陀螺（MMG）。因此，已经构造了混合型精密SINS，其已在包括冲击试验在内的地面车辆测试中证明了所需的精度水平。