支承结构惯量对激光陀螺抖频及精度特性的影响分析  

Analysis of Dithered Frequency of RLG and Influence on Its Precision

作　　者：韩雪峰[1] 

机构地区：[1]海军驻大连地区军事代表室,辽宁大连116021

出　　处：《光学与光电技术》2017年第6期89-94,共6页Optics & Optoelectronic Technology

基　　金：海军装备十三五预研基金(302010701××××)

摘　　要：激光陀螺的机抖特性有效克服了陀螺的闭锁效应,是其高精度输出的重要保障。陀螺在不同惯性装置下的抖频会发生变化,这极大地影响了其输出精度,严重制约了激光陀螺在各类惯性装备下的服役能力。从激光陀螺抖动偏频系统入手,对陀螺及其支承结构进行了结构动力学建模及分析,从理论与原理实验两方面论证了支承结构惯量对陀螺抖频特性,乃至陀螺输出精度的影响,分析结果表明,减小支承结构惯量能提高陀螺抖频,进而提高其精度。为激光陀螺在惯导装备中更好的应用起到了指导作用。Mechanically dithered characteristics of ring laser gyroscope （RLG） effectively eliminate its lock-in effect, and guarantee its measurement precision. However, the dithered frequency of RLG varies with its installation in different inertial equipments, which severely affects its measurement precision, so as to restrict the capability of its active service seriously. Beginning with the principle of dither bias system of RLG, the structral dynamics of RLG with its supporting structures is modeled and analyzed. The influences of the inertia of supporting structure on the dithered fre- quency and even the measurement precision of RLG are demonstrated from the theory and experiment. Analysis results show that the dithered frequency and measurement of RLG can be improved while decreasing the inertia of supporting structure, so as for guiding the better prospect of application of RLG in inertia equipments.

关 键 词：惯性测量单元 激光陀螺 抖动偏频系统 抖频特性 动力学分析 

分 类 号：V241.558[航空宇航科学与技术—飞行器设计]