传感技术学报Issue(12)：1789-1794,6.DOI:10.3969/j.issn.1004-1699.2015.12.010
动态总方差及其在陀螺振动信号分析中的应用
Dynamic Total Variance and Its Application in Analysis of Dynamic Characteristics of Gyroscope
摘要
Abstract
The dynamic Allan variance(DAVAR)is a new method for analyzing random error of gyroscope. Howev⁃er,it has defects such as poor confidence on the estimate and great estimation error at long-term t-values,due to the reduced amount of data captured by the truncation windows. An improvement dynamic Allan variance is proposed to increase the confidence in the case of long-term t-values. Firstly,the random error of FOG is truncated with the win⁃dow function. Then the data in the windows are extended by the total variance method to improve the confidence on the estimate,At last the Allan variance of extended data is calculated,and the noise coefficients of gyro can also be identified and extracted at the same time. At last,they are expressed by three or two-dimensional to describe the dy⁃namic characteristics of gyro. The measured data of linear acceleration test for Hemispherical Resonator Gyro is ana⁃lyzed with proposed algorithm and dynamic Allan variance. The results shows that proposed algorithm can track the non-stationary of gyroscope more effectively and obtain a lower estimation error at long-term t-values.关键词
陀螺仪/动态特性/动态Allan方差/总方差/振动信号Key words
gyroscope/dynamic characteristics/dynamic Allan variance/total variance/vibration signal分类
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朱战辉,汪立新,李灿..动态总方差及其在陀螺振动信号分析中的应用[J].传感技术学报,2015,(12):1789-1794,6.基金项目
国家自然科学基金项目 （）
