Meng Xiangtao, Xiang Zheng, Guo Jing, Li Meiqing. Signal detecting technique of FOG's micro angle vibration under nonuniform sampling[J]. Infrared and Laser Engineering, 2016, 45(3): 322004-0322004(5). doi: 10.3788/IRLA201645.0322004
| Citation:
|
Meng Xiangtao, Xiang Zheng, Guo Jing, Li Meiqing. Signal detecting technique of FOG's micro angle vibration under nonuniform sampling[J]. Infrared and Laser Engineering, 2016, 45(3): 322004-0322004(5). doi: 10.3788/IRLA201645.0322004
|
Signal detecting technique of FOG's micro angle vibration under nonuniform sampling
- Received Date: 2015-07-05
- Rev Recd Date:
2015-08-15
- Publish Date:
2016-03-25
-
Abstract
During the spacecraft's in-orbit running, its structure could get a micro angular vibration due to various moving parts inside, which has relatively small amplitude and high frequency and could result in quality reduction of the optical load's imaging. With broad bandwidth and high sensitivity, the FOG can output angular increment in a sample cycle, making it the perfect sensor of micro angular vibration. But FOG can't be sampled evenly considering the spacecraft's whole scheduling. This paper proposes a frequency spectrum analysis method for nonuniform sampling, which transforms time sequence in a complete nonuniform sampling cycle to the fourier space to obtain original signal's amplitude and frequency so as to achieve high precision measurement of the micro angular vibration. The method has a precision better than 0.04, which was validated by digital simulation and 6-DOF micro vibration test.
-
References
|
[1]
|
Yu Shuhai, Wang Jianli. Numerical simulation of fourier telescopy based on nonuniform sampling[J]. Acta Optica Sinica, 2013, 33(8):1-6. (in Chinese)于树海, 王建立. 非均匀采样的傅里叶望远镜数值模拟研究[J]. 光学学报, 2013, 33(8):1-6. |
|
[2]
|
Yu Benli, Meng Jun. High-accuracy micro-vibration detector[J]. Opto-Electronic Engineering, 2006, 33(1):120-122. (in Chinese)俞本立, 孟军. 微振动的高精度测量[J]. 光电工程, 2006, 33(1):120-122. |
|
[3]
|
Lin Yifan. Reconstruction of signal from nonuniform samples[J]. Information Communications, 2013, 9:44-46. (in Chinese)林伊凡. 一种非均匀采样信号重构方法[J]. 信息通信, 2013, 9:44-46. |
|
[4]
|
Lu Mingfeng, Zhang Feng, Ni Guoqiang. Analysis and improvement of actual sampling system in fractional fourier transform domain[J]. Journal of Electronics Information Technology, 2013, 35(9):2094-2099. (in Chinese)鲁溟峰, 张峰, 倪国强. 工程采样系统的分数阶傅里叶域分析与改进[J]. 电子与信息学报, 2013, 35(9):2094-2099. |
|
[5]
|
Bhandari A, Zayed A I. Shift-invariant and sampling spaces associated with the fractional Fourier transform domain[J]. IEEE Transactions on Signal Processing, 2012, 60(4):1627-1637. |
|
[6]
|
Tao Ran, Deng Bing, Zhang Weiqiang. Sampling and sampling rate conversion of band limited signals in the fractional Fourier transform domain[J]. IEEE Transactions on Signal Processing, 2008, 56(1):158-171. |
|
[7]
|
Wang Qi, Pepin M, Beach R J. SAR-based vibration estimation using the discrete fractional Fourier transform[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(10):4145-4156. |
|
[8]
|
Maciejewski M W, Qui H Z, Rujan I. Nonuniform sampling and spectral aliasing[J]. Journal of Magnetic Resonance, 2009, 199(1):88-93. |
|
[9]
|
Wang Anmin, Chen Liangfu. Weak signal detection and recovery from nonuniform samples using notch filter[J]. Signal Processing, 2009, 25(1):18-21. (in Chinese)汪安民, 陈良福. 非均匀采样下小信号检测与重构的陷波方法[J]. 信号处理, 2009, 25(1):18-21. |
-
-
Proportional views
-
DownLoad: