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경희대학교 천문대 30인치 주망원경 TCS 소프트웨어 개발
문병식,김상준,장민환,민상웅,설경환,문기석,Mun, B.S.,Kim, S.J.,Jang, M.,Min, S.W.,Seol, K.H.,Moon, K.S. 한국천문학회 2006 天文學論叢 Vol.21 No.2
Even though 30inch optical telescope at Kyung Hee Astronomy Observatory has been used to produce a series of scientific achievements since its first light in 1992, numerous difficulties in operating of the telescope have hindered the precise observations needed for further researches. Since the currently used PC-TCS(Personal Computer based Telescope Control System) software based on ISA-bus type is outdated, it doesn't have a user friendly interface and make it impossible to scale. Also accumulated errors which are generated by discordance from input and output signals into a motion controller required new control system. Thus we have improved the telescope control system by updating software and modifying mechanical parts. We applied a new BLDC(brushless DC) servo motor system to the mechanical parts of the telescope and developed a control software using Visual Basic6.0. As a result, we could achieve a high accuracy in controlling of the telescope and use the user friendly GUI(Graphic User Interface).
인공우주물체 추적용 완전 개폐형 돔의 설계 및 구조해석
설경환,김상준,장민환,민상웅,문병식,백기민,Seol, K.H.,Kim, S.J.,Jang, M.,Min, S.W.,Mun, B.S.,Baek, K.M. 한국천문학회 2007 天文學論叢 Vol.22 No.4
We have been making dual dome enclosures which are useful to track artificial space objects at SSNT (Space Science and Technology Lab.) Kyung Hee University. We verified the safety of the dome enclosures using basic design and structure analyses before manufacturing them, and then performed an optimization analysis for economic and safe systems. The dome enclosure has a fully-open type structure to smoothly operate a telescope made in the style of altazimuth mount with very fast tracking. It is also designed to be safe against extreme weather conditions. The general structure of the observatory system consists of the dual dome enclosures at the top of a container. For the structural analyses, we consider the following two methods: (1) gravitational sustain analysis - how the structure supporting the dome withstand the weight of the dome, and (2) wind load analysis that considers the effect of the wind velocity at the region where the observatory is located. The result of overall deformation is found to be less than 0.551mm and the result of equivalent stress is found to be 20.293Mpa, indicating that the dual dome system is reasonably designed. This means structurally to be safe.
경희대학교 인공우주물체 관측시스템을 위한 고속 관측기기 회전 장치의 설계
민상웅,김상준,장민환,문병식,설경환,Min, S.W.,Kim, S.J.,Jang, M.,Mun, B.S.,Seol, K.H. 한국천문학회 2006 天文學論叢 Vol.21 No.2
An alt-azimuth type mount system, developed at the Space Science and Technology Laboratory, Kyung Hee University, has been found to experience some difficulties in monitoring of the artificial space objects. Since the telescope installed on the alt-azimuth mount does not rotate on the same axis as the earth does, this mount system needs an instrument rotator to correct the field rotation. Although there are some commercial instrument rotators already in the market, those are not suitable for our system due to their low interchangeability. In this study, we have designed a new high speed instrument rotator and calculated the deformation of new designed system using structural analyses.