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Modification of the azimuth control system in the LLMC
Li BH(李彬华); Yang L(杨磊); Chen LF(陈林飞); Mao W(冒蔚)
Source PublicationProceedings of SPIE - CURRENT DEVELOPMENTS IN LENS DESIGN AND OPTICAL SYSTEMS ENGINEERING
2000
Volume4093
Pages193-203
DOI10.1117/12.405205
Author of SourceFischer, RE; Johnson, RB; Smith, WJ; Swantner, WH
Contribution Rank第1完成单位
Indexed ByEI ; CPCI
Conference NameConference on Current Developments in Lens Design and Optical Systems Engineering
Conference Date2000-08-02
Conference PlaceSAN DIEGO, CA
Conference SponsorSPIE
KeywordLlmc Azimuth Transmission Single Chip Microcontroller Astrometry
Abstract

A new control system of the azimuth transmission mechanism used in the Lower Latitude Meridian Circle (LLMC) is described in this paper. Because the original azimuth transmission mechanism causes too much vibration during the transposition of the horizontal axis of the instrument, we decided to modify the original system by two ways. One is to modify the lift mechanism and the azimuth transmission mechanism. The other is to replace the original stepper motors with a new type of stepper motor. According to the requirement of the new motor and its sine subdivided microstep driver, the original control system has been modified. The new system has an expansion output board and a new control program compared with the original one. The hardware architecture of the new system is described. The program in the single chip microcontroller is written in ASM, which is composed of 10 subroutines. The program in a host PC is written in C++. The methods using in controlling motors and skills in designing these programs are discussed. Two sketch flow charts of the control program are presented in the paper. Modification of the lift mechanism is also introduced. All this works make the vibration very slight.

Funding OrganizationN/A
Language英语
Subject Area物理学 ; 光学 ; 天文学 ; 天体测量学
MOST Discipline Catalogue理学 ; 理学::物理学 ; 理学::天文学 ; 工学 ; 工学::光学工程
SubtypeProceedings Paper
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Publication Place1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
ISBN0-8194-3738-7
ISSN0277-786X
URL查看原文
Archive Date2001-04-06
WOS IDWOS:000165734700021
WOS Research AreaOptics
WOS SubjectOptics
EI Accession Number2001045434620
EI KeywordsOptical Telescopes
EI Classification Number705.3electric Motors - 714.2semiconductor Devices And Integrated Circuits - 723.1computer Programming - 741.1light/optics - 741.3optical Devices And Systems - 941.3optical Instruments
Citation statistics
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6733
Collection天体测量及应用研究组
Corresponding AuthorLi BH(李彬华)
AffiliationChinese Acad of Sciences, Kunming, China
Recommended Citation
GB/T 7714
Li BH,Yang L,Chen LF,et al. Modification of the azimuth control system in the LLMC[C]//Fischer, RE; Johnson, RB; Smith, WJ; Swantner, WH. 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA:SPIE-INT SOC OPTICAL ENGINEERING,2000:193-203.
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