单轴旋转惯导系统在晃动基座上的建模及误差分析

Modeling and Error Analyzing of Single-Axial Rotation Strapdown Inertial Navigation System on Moving Base

阐述了船用单轴旋转捷联惯导系统的基本原理,推导了系统在动态条件下的误差传播方程。在三轴摇摆这种典型运动形式下,对单轴旋转惯导系统各主要误差因素的传播特性进行了仿真分析,并与不旋转时的误差传播特性进行了对比,给出了各种误差因素对系统的影响规律,并定量地得到了其对导航精度的影响程度。研究结果可为船用单轴旋转惯导系统的工程设计提供理论参考作用。

The principle of the ship＇s single-axial rotation strapdown inertial navigation system （SINS） was introduced and the error differential equation was established on moving base. By simulation, the dominating error elements which effect the performance of SINS were analyzed on the typical three-axial rotation, and the results were compared with the situation of non-rotation. The effect of the error elements were given and the analyzing conclusions were gained quantificationally. The study results offer an academic basis for designing of single-axial rotation SINS.