| 光纤陀螺信号误差分析与滤波算法的研究 |
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| 引用本文： | 姬伟,李奇.光纤陀螺信号误差分析与滤波算法的研究[J].传感技术学报,2007,20(4):847-852. |
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| 作者姓名： | 姬伟 李奇 |
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| 作者单位： | 江苏大学电气信息工程学院,江苏镇江,212013;东南大学自控系,南京,210096 |
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| 摘 要： | 针对光纤陀螺信号漂移误差和噪声的影响,采用Allan方差法对光纤陀螺的各项随机误差成分进行了分离和计算.然后结合陀螺稳定平台系统研究了滑动滤波、小波变换阈值滤波两种直接对陀螺输出信号进行数字滤波处理的方案.最后对某陀螺惯性稳定跟踪转台中使用的光纤陀螺信号的测试和统计分析结果表明,采用Allan方差法能够有效地分离和辨识陀螺零漂信号中的各项噪声源随机误差系数和误差大小,采用的小波变换阈值滤波的去噪效果明显.
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| 关 键 词： | 光纤陀螺 Allan方差 功率谱密度 滑动滤波 小波变换阈值滤波 |
| 文章编号： | 1004-1699（2007）04-0847-06 |
| 收稿时间： | 2006-06-11 |
| 修稿时间： | 2006-07-20 |
Research on Signal Analysis and Processing of FOG |
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| JI Wei,LI Qi.Research on Signal Analysis and Processing of FOG[J].Journal of Transduction Technology,2007,20(4):847-852. |
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| Authors: | JI Wei LI Qi |
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| Affiliation: | 1.School of Electrical and Information Engineering, Jiangsu University, Zhenj iang 212013;2. Department of Automation Control, Southeast University, Nanj ing 210096, China |
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| Abstract: | The properties of the fiber optic gyro(FOG)random drift are detected with the Allan variance method.The sources of some kinds of noise and its properties are analyzed and calculated.According to the characteristics of the gyro stabilization platform system,the moving filter and the threshold-value filter based on wavelet transform are used to de-noise the signal.The result of testing and statistic analyzing for FOG signal indicates that the Allan variance means is successful in separating the main random error source of signal noise and the advantages of the wavelet threshold-value filter is verified. |
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| Keywords: | fiber optic gyro Allan variance power spectrum density(PSD) moving filter wavelet threshold-value filter |
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