一种外环水平结构双轴光纤惯导系统旋转方案设计方法

目前国内外长航时高精度自主惯导系统多采用双轴旋转调制自动补偿技术,而旋转方案设计对系统导航精度影响至关重要.双轴惯导系统按结构可分为外环水平结构和外环航向结构两类.分析了外环水平结构双轴惯导系统在旋转方案设计中的局限性,考虑到光纤陀螺输出特性,指出外环水平结构双轴光纤惯导系统不宜采用传统旋转方案,并提出了一种该类双轴光纤惯导系统的旋转方案设计方法,最后对所设计旋转方案与十六位置旋转方案进行试验对比,试验表明此设计方案导航精度提升了71％.

Rotation Scheme Design Method for Dual Axis INS with Horizontal Outer Axis Structure

The long endurance and high precision autonomous INS always adopt rotation modulation self compensation technology, and its accuracy is significantly influnced by the rotation scheme design. According to the structure, dual axis INS can be devided into two categories, horizental outer axis and vertical outer axis. Considering the limitation of dual axis INS with horizental outer axis structure and the output characteristics of the FOG, the paper pointed out that INS with horizental outer axis is not suitable to the traditional rotation scheme and proposed a design method of rotation scheme for this kind of dual axis INS. The result of experiment shows that the navigation precision with the proposed scheme increased by 71% compared with sixteen squence scheme