Modification of the azimuth control system in the LLMC

	Modification of the azimuth control system in the LLMC
	Li BH(李彬华); Yang L(杨磊); Chen LF(陈林飞); Mao Y(冒蔚); Chen LF(陈林飞); Li BH(李彬华); Mao W(冒蔚); Yang L(杨磊); Yang L(杨磊)
	2000
会议名称	Conference on Current Developments in Lens Design and Optical Systems Engineering
会议日期	2000-08-02
会议地点	SAN DIEGO, CA
关键词	LLMC azimuth transmission single chip microcontroller astrometry
卷号	4093
页码	193-203
通讯作者	Li, BH
英文摘要	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.
收录类别	EI ; CPCI
产权排序	第一完成单位
会议网址	http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=915869
会议录	Proceedings of SPIE - CURRENT DEVELOPMENTS IN LENS DESIGN AND OPTICAL SYSTEMS ENGINEERING
会议录出版者	SPIE-INT SOC OPTICAL ENGINEERING
会议录出版地	1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
学科主题	Optics
语种	英语
ISSN号	0277-786X
ISBN号	0-8194-3738-7
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6733]
专题	云南天文台_天体测量及应用研究组
通讯作者	Li BH(李彬华)
推荐引用方式 GB/T 7714	Li BH,Yang L,Chen LF,et al. Modification of the azimuth control system in the LLMC[C]. 见:Conference on Current Developments in Lens Design and Optical Systems Engineering. SAN DIEGO, CA. 2000-08-02.http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=915869.