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Combining a disturbance observer with triple-loop control based on MEMS accelerometers for line-of-sight stabilization
Luo, Yong1,2,3; Huang, Yongmei1,2; Deng, Chao1,2,3; Mao, Yao1,2; Ren, Wei1,2,3; Wu, Qiongyan1,2
2017
Source PublicationSensors (Switzerland)
ISSN1424-8220
Volume17Issue:11Pages:2648
AbstractIn the CCD-based fine tracking optical system (FTOS), the whole disturbance suppression ability (DSA) is the product of the inner loop and outer position loop. Traditionally, high sampling fiber-optic gyroscopes (FOGs) are added to the platform to stabilize the line-of-sight (LOS). However, because of the FOGs’ high cost and relatively big volume relative to the back narrow space of small rotating mirrors, we attempt in this work to utilize a cheaper and smaller micro-electro-mechanical system (MEMS) accelerometer to build the inner loop, replacing the FOG. Unfortunately, since accelerometers are susceptible to the low-frequency noise, according to the classical way of using accelerometers, the crucial low-frequency DSA of the system is insufficient. To solve this problem, in this paper, we propose an approach based on MEMS accelerometers combining disturbance observer (DOB) with triple-loop control (TLC) in which the composite velocity loop is built by acceleration integration and corrected by CCD. The DOB is firstly used to reform the platform, greatly improving the medium-frequency DSA. Then the composite velocity loop exchanges a part of medium-frequency performance for the low-frequency DSA. A detailed analysis and experiments verify the proposed method has a better DSA than the traditional way and could totally substitute FOG in the LOS stabilization. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.
KeywordAccelerometers - Closed loop control systems - Fiber optics - Gyroscopes - Optical systems - Stabilization
Indexed ByEi
Language英语
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/8896
Collection光电工程总体研究室(一室)
Affiliation1.Key Laboratory of Optical Engineering, Chinese Academy of Sciences, Chengdu; 610209, China;
2.Institute of Optics and Electronics, Chinese Academy of Science, Chengdu; 610209, China;
3.University of Chinese Academy of Sciences, Beijing; 100039, China
Recommended Citation
GB/T 7714
Luo, Yong,Huang, Yongmei,Deng, Chao,et al. Combining a disturbance observer with triple-loop control based on MEMS accelerometers for line-of-sight stabilization[J]. Sensors (Switzerland),2017,17(11):2648.
APA Luo, Yong,Huang, Yongmei,Deng, Chao,Mao, Yao,Ren, Wei,&Wu, Qiongyan.(2017).Combining a disturbance observer with triple-loop control based on MEMS accelerometers for line-of-sight stabilization.Sensors (Switzerland),17(11),2648.
MLA Luo, Yong,et al."Combining a disturbance observer with triple-loop control based on MEMS accelerometers for line-of-sight stabilization".Sensors (Switzerland) 17.11(2017):2648.
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