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Department光电工程总体研究室(一室)
Error-based plug-in controller of tip-tilt mirror to reject telescope's structural vibrations
Tang, Tao1,2; Yang, Tao1,2; Qi, Bo1,2; Cao, Lei1,2; Ren, Ge1,2; Hu, Hongyi1,2
Source PublicationJournal of Astronomical Telescopes, Instruments, and Systems
Volume4Issue:4Pages:049004
2018-10-01
Language英语
ISSN2329-4124
DOI10.1117/1.JATIS.4.4.049004
Indexed ByEi
EI Accession Number20184406011302
SubtypeJ
AbstractStructural vibrations usually feature tip-tilt modes and affect the closed-loop performance of the tip-tilt mirror control system in astronomical telescopes. Long integration time of the image sensor always restricts the closed-loop control bandwidth, resulting in difficulties in rejecting structural vibrations. An error-based plug-in controller to mitigate multimodal structural vibrations is proposed. Only position error is used in this proposed controller, which can be plugged into existing feedback loops to create high gain at the frequencies of multimodal disturbances, and thereby the closed-loop performance can be optimized by designing an appropriate Q-filter. When the centered frequencies of energetic disturbances are determined, a band-pass filter is suggested to mitigate multimodal vibrations. This improved band-pass filter can avoid big amplifications at other frequencies. Due to not being restricted by an accurate model, the plug-in controller does not lead to a compromise between vibration rejection and control stability. Both simulation and experiment validate the effectiveness of the proposed method in the tip-tilt mirror control system under the condition of vibrations. © 2018 Society of Photo-Optical Instrumentation Engineers (SPIE).
KeywordBandpass filters Closed loop control systems Control systems Errors Mirrors Radio telescopes Speed control Structural dynamics
EI KeywordsBandpass filters ; Closed loop control systems ; Control systems ; Errors ; Mirrors ; Radio telescopes ; Speed control ; Structural dynamics
EI Classification Number408 Structural Design ; 657.2 Extraterrestrial Physics and Stellar Phenomena ; 703.2 Electric Filters ; 731.1 Control Systems ; 731.3 Specific Variables Control ; 732.1 Control Equipment ; 741.3 Optical Devices and Systems
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/9292
Collection光电工程总体研究室(一室)
Affiliation1.Chinese Academy of Sciences, Institute of Optics and Electronics, Chengdu, China;
2.Chinese Academy of Sciences, Key Laboratory of Optical Engineering, Chengdu, China
Recommended Citation
GB/T 7714
Tang, Tao,Yang, Tao,Qi, Bo,et al. Error-based plug-in controller of tip-tilt mirror to reject telescope's structural vibrations[J]. Journal of Astronomical Telescopes, Instruments, and Systems,2018,4(4):049004.
APA Tang, Tao,Yang, Tao,Qi, Bo,Cao, Lei,Ren, Ge,&Hu, Hongyi.(2018).Error-based plug-in controller of tip-tilt mirror to reject telescope's structural vibrations.Journal of Astronomical Telescopes, Instruments, and Systems,4(4),049004.
MLA Tang, Tao,et al."Error-based plug-in controller of tip-tilt mirror to reject telescope's structural vibrations".Journal of Astronomical Telescopes, Instruments, and Systems 4.4(2018):049004.
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