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강춘길,원명식,Kang, Choon-Kil,Won, Myong-Shik 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.3
The fins of a missile which is folded within a canister are deployed according to a command during the missile flight. The aerodynamic load generated by operating environments such as missile flight speed, platform movement speed and wind acts as an anti-deploying force and prevents the fins from deploying. As the diversification of platforms and the higher speed of missiles need a larger deploying force but the space for operating the fin deploying device is getting narrower, the new design concepts are required for developing such a device. In this study, a pneumatic device for deploying missile fins is designed and its characteristics are verified through experiments and analyses.
강춘길,이동민,박근수,Kang, ChoonGil,Lee, DongMin,Park, GeunSoo 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.2
In this paper, we have proposed a separable nose cap and its opening device to protect a seeker's window from aerodynamic heating and to decrease the drag force on missile body. The nose cap should be promptly deployed to secure the view field of seeker when it is needed. This cap consists of two nose cap structures and separation devices such as pyro puller and pusher. The performance of pyro puller was fully verified through analyses and several kinds of operating tests. We can obtain a sufficient confidence level of the pyro puller through many operating tests under various environments.
힌지 연결된 분할형 동체를 갖는 유도탄의 고유진동특성 연구
강춘길,원명식,Kang, Choon-Gil,Won, Myong-Shik 한국군사과학기술학회 2007 한국군사과학기술학회지 Vol.10 No.4
The missile for this study has shown different natural frequency characteristics depending on the test conditions; natural frequencies obtained from its flight test are higher than those in its ground test. It was found that the hinged joints connecting front airframe to rear one had the nonlinear stiffness and caused the missile to show very complex dynamic characteristics. The angular stiffness at hinged joints was calculated using 3D finite element analysis, and it was verified that there was a highly nonlinear relationship between angular stiffness and external load. Natural frequencies calculated considering the nonlinearity of angular stiffness were nearly the same as test results. Through this study, the dynamic characteristics of a missile having split airframes with hinged joints could be clearly identified and a way of maintaining its natural frequencies consistent was generated.
강춘길(Chun-Kil Kang),신경희(Kyoung-Hee Shin),유재우(Chae-Woo Yoo) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.1A
본 논문에서 다루는 SGML 문서편집기는 파서를 내포하는 구조로서, 문서편집을 위하여 DTD가 입력되고, 입력된 DTD는 DTD 파서에 의해 적합성을 점검하게 된다. DTD 파서는 표준규칙에 따라 DTD를 파싱하고, 결과로 편집처리에 적합한 BNF-스타일 형태로 변환된 문법 테이블을 생성한다. SGML 문서 편집은 문법테이블 정보에 따라 처리된다. 문법 테이블의 크기는 엘리먼트 선언내용 중 컨텐트 모델의 표현에 따라 결정된다. 그 중 and(&) 접속자는 엘리먼트 개수에 따라 문법수가 기하급수적으로 증가하므로 DTD 파서에 의해 처리된다면 속도나 비용면에서 비효율적이다. 이에 본 논문에서는 고정된 문법테이블을 이용하는 SGML 편집기에 and 접속자로 표현된 엘리먼트 문법을 동적으로 확정 처리할 수 있는 기능이 추가 향상된 구문지향적 SGML 문서편집기를 제시한다. 그러므로 향상된 구문지향 SGML 문서편집기는 고정된 문법을 이용한 문서편집 뿐 아니라 편집처리에 따른 변환에 능동적으로 처리할 수 있다는 특징을 갖게 된다.