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A pneumatic axial support prototype of the primary mirror of a 2m solar telescope
Yang, Dehua1; Wu, Changcheng1; Fei, Fei1; Jin ZY(金振宇)2; Liu Z(刘忠)2
Source PublicationProceedings of SPIE - The International Society for Optical Engineering-Ground-Based and Airborne Telescopes VII
Author of SourceSPIE - The International Society for Optical Engineering
Contribution Rank第2完成单位
Indexed ByEI ; CPCI
Conference NameGround-Based and Airborne Telescopes VII 2018
Conference Date2018-06-10
Conference PlaceAustin, TX, United states
Conference Sponsor4D Technology; Andor Technology, Ltd.; Astronomical Consultants and Equipment, Inc.; et al.; Giant Magellan Telescope; GPixel, Inc.
KeywordSolar Telescope Ring Primary Mirror Support Pneumatic Actuator Steel Bellow Displacement Actuator

A so-called Semi-Active Support (SAS) system was proposed for the primary mirror of the YNAO 2-m Ring Solar Telescope (2-m RST of Yunnan Astronomical Observatory, China), whose primary mirror is distinctively figured in a ring with an outer diameter of 2.02 m and a ring width of 0.35 m. This paper reports the design and tests of the prototype of the pneumatic-based semi-active axial support system of the 2-m RST. The dummy mirror was a solid circular plate glass of 700 mm in diameter and 20 mm in thickness, which was support by nine Pneumatic Force Actuators (PFAs) organized in three groups, each group was regulated by one proportional regulating solenoid valve. Besides, three Displacement Actuators (DAs) were used to actively define the three Degrees Of Freedom (DOFs) of piston and tip/tilt of the dummy mirror. The pneumatic force actuators were to be actively pumped and regulated, meanwhile, the displacement actuators to actively define the primary's position, according to the variation of the elevation pointing of the telescope. The PFA was build with a metal bellow as its cylinder, and a pressing load cell of 200 N capacity with 5 mN resolution was integrated on its output tip. The DA was a step-motor based design with a travel range of 4 mm and a theoretical resolution of 50 nm. Basic technical requirements for the PFAs and DAs were reviewed first. General consideration and configuration of the prototype was elaborated, followed by detailed designs and comprehensive tests of the either type standalone actuator. The prototype was finally tested on a systematic level as well. This prototype study has paved a reasonable way for critical design of the axial support system of the 2-m RST primary mirror.

Funding ProjectNational Natural Science Foundation of China[U1531110]
Funding OrganizationNational Natural Science Foundation of China
Subject Area太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
Publication Place1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
WOS IDWOS:000450858000106
WOS Research AreaAstronomy & Astrophysics ; Instruments & Instrumentation ; Optics
WOS SubjectAstronomy & Astrophysics ; Instruments & Instrumentation ; Optics
EI Accession Number20183305684541
EI KeywordsPneumatic Actuators
EI Classification Number535.2metal Forming - 619pipes, Tanks And Accessories ; Plant Engineering Generally - 632.3pneumatics - 705.3electric Motors - 732.1control Equipment - 741.3optical Devices And Systems - 931.1mechanics
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Document Type会议论文
Corresponding AuthorYang, Dehua
Affiliation1.College of Automation Engineering, Nanjing University of Aeronautics and Astronautics (NUAA), 29 Jiangjun Ave., Nanjing, 211106, China
2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, 650216, China
Recommended Citation
GB/T 7714
Yang, Dehua,Wu, Changcheng,Fei, Fei,et al. A pneumatic axial support prototype of the primary mirror of a 2m solar telescope[C]//SPIE - The International Society for Optical Engineering. 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA:SPIE-INT SOC OPTICAL ENGINEERING,2018.
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