用于测量世界时的大型光纤陀螺仪的噪声分析  

Noise Analysis of the Large-scale Fiber Optic Gyroscope for Measuring the UT1

作　　者：王惜康 高玉平[2,3,4] 孙中苗[1] WANG Xi-kang;GAO Yu-ping;SUN Zhong-miao(State Key Laboratory of Geo-information Engineering,Xi'an Research Institute of Surveying and Mapping,Xi'an 710000;National Time Service Center,Chinese Academy of Sciences,Xi'an 710600;Key Laboratory of Time and Frequency Primary Standards,Chinese Academy of Sciences,Xi'an 710600;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]西安测绘研究所地理信息工程国家重点实验室,西安710000 [2]中国科学院国家授时中心,西安710600 [3]中国科学院时间频率基准重点实验室,西安710600 [4]中国科学院大学,北京100049

出　　处：《天文学报》2019年第6期17-25,共9页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(11373028、91736207)资助

摘　　要：大型光纤陀螺仪可以精确测量地球自转角速率,进而可以运用于世界时(UT1)的解算工作中.光纤陀螺仪包含的噪声会影响测量的精确度以及稳定性,运用Allan方差可以对光纤陀螺仪的输出数据进行噪声分析,同时对陀螺仪测量数据进行功率谱分析,分析测量数据中存在的高频振动变化影响,并结合分析结果,从数据处理方法上提出改进措施.分析结果可以对光纤陀螺仪的改进以及数据处理方法的建立提供参考.The large-scale Fiber Optic Gyroscope(FOG)can measure the Earth rotation rate accurately.It can be used to calculate the UT1 parameters.However,the noises of the FOG will affect measurement accuracy and stability.We can analyze the noises of the FOG in output data by Allan variance.At the same time,we analyze the power spectral density(PSD)of the measurement data,which can be used for analyzing the high frequency vibration existed in the measurement data.According to the analysis results,we provide improvement measures on the data processing method.In this paper,the analysis results can provide a reference for improving the large-scale FOG and establishing the data processing method in future.

关 键 词：光纤陀螺仪 世界时 噪声系数 阿伦方差 功率谱密度 

分 类 号：P122[天文地球—天体测量]