基于结构设计的陀螺加速度计温度系数补偿方法  

Temperature coefficient compensation method of gyro accelerometer based on structure design

作　　者：周晓俊 凌林本 杨功流[1] 李亮[2] ZHOU Xiaojun;LING Linben;YANG Gongliu;LI Liang(School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;Beijing Institute of Aerospace Control Devices,Beijing 100039,China)

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]北京航天控制仪器研究所,北京100039

出　　处：《中国惯性技术学报》2023年第2期207-212,共6页Journal of Chinese Inertial Technology

基　　金：国防基础科研计划(WDZC20190101);装备重大基础研究项目(514010208-103)。

摘　　要：针对液浮陀螺加速度计内部温度变化对仪表性能影响明显的问题,通过降低仪表一次项温度系数来减小仪表误差。首先分析液浮陀螺加速度计一次项温度系数的作用机理和计算方法,提出了一种基于结构设计的温度系数补偿方法:在浮子结构上去除一定量的体积,调整浮子的质心和浮心到中心的距离,使得浮油产生的浮力随温度变化,补偿仪表摆性温度变化率和角动量温度变化率的不匹配量。其次对某型陀螺加速度计浮子结构进行补偿设计,并对补偿前与补偿后的温度系数进行实验验证,温度系数由补偿前的-1.04×10^(-5)/℃降低至补偿后的9.39×10^(-7)/℃。实验结果表明,在同等温控精度条件下,采用结构设计补偿温度系数的方法可将温度系数降低一个数量级,这对液浮陀螺加速度计的精度提升具有一定的工程应用价值。Aiming at the obvious influence of internal temperature variation on instrument performance of liquid floating gyro accelerometer,instrument error is reduced by reducing the linear coefficient of temperature coefficient.Firstly,the action mechanism and calculation method of the temperature coefficient of liquid floated gyro accelerometer are analyzed,and a temperature coefficient compensation method based on structural design is proposed.A certain amount of volume is removed from the float structure,the distance from the mass center to the center,and the distance from the floating center to the center are adjusted,so that the buoyancy generated by the oil slick changes with the temperature,and the mismatch between the pendulum temperature change rate and the angular momentum temperature change rate of the instrument is compensated.Secondly,the compensation design of float structure of a gyro accelerometer is carried out,and the temperature coefficient before and after compensation is verified by experiments.The temperature coefficient decreases from-1.04×10^(-5)/℃(before compensation)to 9.39×10^(-7)/℃(after compensation).The experimental results show that the temperature coefficient can be reduced by one order of magnitude by using the method of structural design to compensate the temperature coefficient under the same temperature control accuracy,which has a certain engineering application value for the improvement of the precision of the liquid floating gyro accelerometer..

关 键 词：陀螺加速度计 一次项 温度系数 结构设计 补偿 

分 类 号：U666.1[交通运输工程—船舶及航道工程]