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An additional velocity loop in the CCD and MEMS accelerometer-based lightweight optoelectronic system control
Luo, Yong1,2,3; Deng, Chao1,2,3; Huang, Yongmei1,2; Mao, Yao1,2; Wu, Qiongyan1,2
Indexed BySCI ; Ei
WOS IDWOS:000453907800025
EI Accession Number20185006248621
AbstractIn the charge-coupled device(CCD)-based optoelectronic system(OS), the external disturbance has a bad influence on the line-of-sight(LOS) stabilization, especially in a moving platform. Generally, with a high-performance fiber-optic gyroscope(FOG), we build a velocity inner loop to enhance the disturbance suppression ability(DSA). However, FOG has a big size, high cost and power consumption which limit its application in space-constrained occasion. With the development of the micro-electro-mechanical system(MEMS) industry, the MEMS accelerometer and gyro are more used in the optoelectronic field for their small volume and low price. Since the MEMS accelerometer has a much higher bandwidth than the MEMS gyro, it's more suitable to build a high-bandwidth and high-sampling inner loop to enhance the DSA. Unfortunately, since the signal of the MEMS accelerometer in low frequency is weak and commonly with drift and much noise, the low-frequency DSA of the inner loop is insufficient. Considering the CCD has a good low-frequency signal and the MEMS accelerometer has an advantage in high frequency, based on the acceleration and position double-loop control(APDC), we proposed to add an additional velocity loop by fusing the CCD's low-frequency signal and the accelerometer's high-frequency signal with an open-loop bandwidth fusion method(OBF) to further enhance the DSA. The fusion velocity even has a higher bandwidth than the MEMS gyro. A series of comparative experimental results demonstrate the proposed method could get a lightweight OS with a strong DSA, which is close to the triple loop control based on the MEMS accelerometer and real gyro, and even has a better DSA in medium frequency.
Keywordoptoelectronic system disturbance suppression ability line-of-sight stabilization sensors fusion the open-loop bandwidth fusion
EI KeywordsAccelerometers ; Adaptive systems ; Bandwidth ; Charge coupled devices ; Fiber optics ; Gyroscopes ; Light propagation ; Optoelectronic devices ; Stabilization ; Velocity
Conference NameConference on Environmental Effects on Light Propagation and Adaptive SystemsConference on Environmental Effects on Light Propagation and Adaptive Systems
Conference DateSEP 12-13, 2018SEP 12-13, 2018
Conference PlaceBerlin, GERMANYBerlin, GERMANY
EI Classification Number704.2 Electric Equipment ; 714.2 Semiconductor Devices and Integrated Circuits ; 716.1 Information Theory and Signal Processing ; 741 Light, Optics and Optical Devices ; 943.1 Mechanical Instruments
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Document Type会议论文
Corresponding AuthorMao, Yao
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 Science, Beijing; 100039, China
Recommended Citation
GB/T 7714
Luo, Yong,Deng, Chao,Huang, Yongmei,et al. An additional velocity loop in the CCD and MEMS accelerometer-based lightweight optoelectronic system control[C],2018:107870U.
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