| 光纤陀螺分形噪声的预白化滤波方法 |
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| 引用本文： | 华春红,任章,张敏虎.光纤陀螺分形噪声的预白化滤波方法[J].北京航空航天大学学报,2011,37(2):216-219. |
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| 作者姓名： | 华春红 任章 张敏虎 |
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| 作者单位： | 北京航空航天大学 自动化科学与电气工程学院, 北京 100191 |
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| 基金项目： | 航空科学基金资助项目(20070851011) |
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| 摘 要： | 光纤陀螺分形噪声往往具有长相关特性,导致陀螺输出信号慢漂移.为了滤除这类分形噪声,提出了一种分数阶预白化差分方法,通过该方法可以将分形噪声转化为高斯白噪声;利用小波变换,在小波变换域中采用Bayes软阈值去噪方法去除该白化噪声,从而形成了一种光纤陀螺分形噪声的预白化滤波方法.对VG949p型光纤陀螺实测数据处理结果表明,该方法能够有效地去除其中的分形噪声,抑制了陀螺低频漂移,同时也滤掉了其高频噪声项.
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| 关 键 词： | 光纤陀螺 随机误差 差分方程 小波分析 |
| 收稿时间： | 2009-12-24 |
Pre-whitening filter of fractal noise in fiber optic gyroscope |
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| Hua Chunhong,Ren Zhang,Zhang Minhu.Pre-whitening filter of fractal noise in fiber optic gyroscope[J].Journal of Beijing University of Aeronautics and Astronautics,2011,37(2):216-219. |
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| Authors: | Hua Chunhong Ren Zhang Zhang Minhu |
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| Institution: | School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Fractal noise in fiber optic gyroscope(FOG) usually is long-term dependent,which causes FOG a rather slow drift.In order to filter this noise,a pre-whitening filter based on fractional difference(FD) was proposed.By this filter,fractal noise could be transformed into Gaussian white noise(GWN).And through wavelet analysis,the pre-whitening noise could be eliminated by Bayes soft-threshold denoising in wavelet domain.On the two aforementioned steps,it came into a pre-whitening filter method of fractal noise.A... |
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| Keywords: | fiber optic gyroscope(FOG) random errors difference equations wavelet analysis |
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