인증비행시험 안전관리 및 위험도 평가기법 연구

최주원,Choi, Joo-Won 항공우주시스템공학회 2011 항공우주시스템공학회지 Vol.5 No.1

Certification flight test is very risky and there are many hazards. Because the flight test is performed with the aircraft, that is safety and flight characteristics are not proven. And the test items and conditions are critical. If there is loss of aircraft during certification flight test, the certification program, development period can be delayed. Therefore, maintaining safety of the aircraft during flight test is very important. There are not much flight test experiences in Korea. However, developed nations has long history of flight test and experiences of flight test accidents. Based on these experiences, they has developed systematic management methods for the flight test safety. In this study, I would like to introduce safety management and risk assessment of the certification flight test.

무인기 감항기준 안전도 설정기법 연구

최주원,Choi, Joo-won 항공우주시스템공학회 2008 항공우주시스템공학회지 Vol.2 No.4

To operate UAV in the civil airspace, the airworthiness of UAV system have to be proven by the civil certification system. However, it is difficult for UAV to be certified by the existing certification system because the existing certification system has been developed for the manned aircraft. So, many civil aviation authorities and research institutes are studying developing airworthiness standards for UAV certification. To develop an airworthiness standards for UAV, the airworthiness level of safety have to be established based on UAV categorization. I would like to introduce an quantitative methods for establishing airworthiness level of safety of UAV based on UAV categorization and example of Smart UAV.

어린이 참여디자인을 위한 디자인 교육 프로그램 연구 - 수원시 어공6호 어린이공원을 사례로 -

최주원,정수진,Choi, Ju-won,Chung, Soo-Jin 한국조경학회 2017 韓國造景學會誌 Vol.45 No.5

최근 도시공간의 설계과정에서 주민 참여와 사용자 중심의 디자인이 중요해지고 있다. 어린이공원도 사용자인 어린이의 의견 반영할 필요에 대한 논의가 시작되고 있는 바, 어린이의 의견을 반영하기 위해서는 기존 주민참여방식과 다른 방법론이 필요할 것이다. 본 연구에서는 어린이를 대상으로 디자인 교육프로그램을 구성하여 디자인 교육을 통한 사용자 의견을 설계안으로 반영하여 어린이공원에 적용했다. 교육프로그램은 기존의 연구 및 어린이를 대상으로 하는 디자인 교육, 참여디자인 프로그램을 참조하여 5주간의 교육프로그램, 교재, 교수방법을 구성하였다. 이 프로그램을 시범적으로 수원시 권선구에 위치한 어공6호 어린이공원을 대상지로 삼고, 선일초등학교 5학년 1반 아이들과 함께 워크숍을 진행한 결과를 재해석하여 어린이공원 공사과정에 반영하였다. 본 디자인 교육프로그램은 참여 교수들의 구성 및 운영방법, 교재 및 교사교재 제작 등에서 다른 워크숍 프로그램과 차별성을 가지고 있으며, 이로 인하여 동일 과정을 반복할 수 있는 프로그램 기반을 구축했다는 점에서 의의가 있다. 추후, 준공 이후의 어린이공원의 사용현황을 모니터링 하는 등의 연구를 통해서 사용자 참여가 미치는 영향에 대한 검증이 추가적으로 필요하며, 앞으로 어린이 공원에 대한 보다 다양한 디자인 방법론의 적용과 사용자인 어린이 의견을 반영할 수 있는 다양한 시도들이 축적될 필요가 있다. Recently, citizen participation and user - oriented design are becoming increasingly important in the urban space design process. The Children's Park has also begun to discuss the need to reflect children's opinions and needs as well as existing ways and means of participation to reflect these opinions and ideas. In this study, a design education program for children was constructed and user opinions accessed via this design education were reflected in design and applied to the Children's Park. The training program consists of five weeks of educational programs, textbooks and teaching methods related to existing research, design education for children and participatory design programs. This program was used as a pilot of Eogong-6ho Children 's Park(No. 6 Children's Park), located in Gwonseon-gu, Suwon, and reinterpreted the results of the workshop for 5th grade students at Sunil Elementary School. This design education program is distinguished from other workshop programs on how to organize and operate participating professors and textbooks, and has a program base that can reproduce the entire process. In addition, it is necessary to verify the effects of user participation through research, such as monitoring the use of children's parks after completion, as well as the application of more diverse design methodologies to children's parks and the way they reflect children's opinions.

무인항공기 인증제도에 관한 연구

최주원,Choi, Joo-Won 항공우주시스템공학회 2012 항공우주시스템공학회지 Vol.6 No.1

Nowadays, the demand of civil application of an UAV has been being increased all over the world. And many projects are going on to develop a new regulatory system for an UAV to access a national airspace. Especially, to fly UAV over the non-restricted airspace as a standard airworthiness standard, many authority funded research institutes and associations are studying regulatory environment. For the UAV to access civil airspace, the certification system of the aviation regulation have to allow this. FAA of US, CASA of Australia and European authorities are now issuing an experimental airworthiness certificate to a civil UAV. This is the first step of issuing a standard airworthiness certificate. And many people believe that civil UAV can fly over a NAS if some technical issues are resolved. In this study, I would like to present an international trends of a civil UAV regulation system, reliability trend of unmanned aerial system and would like to bring up a our regulatory environment and suggest an UAV regulatory policy.

소형비행기 실속특성 향상 및 적합성검증 방안 연구

최주원,김진수,Choi, Joowon,Kim, Jinsoo 항공우주시스템공학회 2014 항공우주시스템공학회지 Vol.8 No.3

This is a research on the method of how to improve stall characteristics for the small general aviation airplanes to meet the FAR part 23 requirements. This research is based on the experience of certification flight tests of KC-100 airplane for Korea type certification. KAS/FAR Part 23.201/203 are the stall characteristics requirements. 23.201 requires to show the stable stalling tendency of the wings level stall and 23.203 requires to show the stable stalling tendency of stall characteristics during turning flight. In this paper, the stall characteristics requirements, improvement methods and flight test experience of KC-100 airplane for type certification.

소형비행기 가로안정성 향상 및 적합성검증 방안 연구

최주원,김찬조,정훈화,김진수,Choi, Joo-Won,Kim, Chan-Jo,Jung, Hoon-Hwa,Kim, Jin-Su 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.2

This is a research on the method of how to improve lateral stability for the small general aviation airplane to meet the FAR part 23 requirements. This research is based on the experience of certification flight tests of KC-100 airplane for Korea first type certification. KAS/FAR Part 23.177 is the static lateral and directional stability requirement. And, 23.177(b) requires to show the tendency to raise the low wing in steady heading side slip maneuver. However, it is very difficult for the low wing to be raised at the low speed during the steady heading side slip maneuver. So, the requirement allows not be negative at the $1.2V_{S1}$ speed and takeoff configuration. (static stability requirement requires low wing picked up at any speed except $1.2V_{S1}$ speed and takeoff configuration) In this paper, the static lateral stability requirements and the lessons & learned of KC-100 airplane certification flight test results are shown.

ONASys: 온라인 뉴스기사의 재구성

최주원(Joo-Won Choi),나종열(Jong-Ryul Nah),최동현(Dong-Hyun Choi),여명숙(Myeun g-Sook Yoh),신지애(Ji-Ae Shin),최기선(Key-Sun Choi) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.2C

웹에는 방대한 양의 정보가 있지만 현재 그 활용은 제한적이다. 본 연구는 기존에 PC를 통해서만 접근 가능했던 웹 정보를 TV나 모바일 기기를 통해서 볼 수 있게 함으로써, 사용자로 하여금 시공간의 제약으로부터 자유로운 정보 환경을 제공하려는 취지에서 수행되었다. 현재의 웹 정보를 TV나 모바일 기기와 같은 일상적인 매체를 통해서도 활용할 수 있기 위해서는 각 디바이스의 화면에 적합하게 필터링과 요약을 통해 재구성 하는 기술이 요구된다. 본 논문에서는 자연어처리 기술에 기반하여 온라인 뉴스 페이지를 개인 디바이스에 적합한 형태로 내용과 레이아웃을 재구성하는 시스템인 ONASys(Online News Adaptation System) 에 대해 소개한다. ONASys는 공간적, 내용적 속성을 이용하여 웹페이지 상의 중요 정보를 선별하는 ‘컨텐츠 필터링 모듈’, 요약 패턴의 분석과 공기 정보를 통한 문법적 주 요소 인식을 통해 문장을 요약하는 ‘문장 요약 모듈’, 제목과 문장의 연관성을 통하여 문장의 중요도를 판단하는 ‘중요도 결정 모듈’로 구성된다.

나선형 홈이 있는 벤틸레이티드 브레이크 디스크의 유한요소해석

최주원(Joo won Choi),최영(Young Choi),김형만(Hyung man Kim),서용위(Yong wie Seo) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11

Brake disc is subjected to a thermal deformation induced by the frictional heating during braking. In the current analytical study on the thermal deformation of the disc, the new prototype brake disc with helical grooved vent is proposed to improve the thermal dissipation of the disc. The helical grooved vent has higher convective film coefficient and greater stiffness for the disc to have less thermal deformation. The finite element analysis has been performed to compare the heat transfer characteristics and thermal deformation for both the proposed ventilated brake disc and the conventional one. The results showed that the proposed helical grooved vent type has greater cooling capability over the conventional disc by reduced frictional heating.

OPPAV 안전성 평가 및 결함수 분석

최주원(Joowon Choi),황창전(Changjeon Hwang),석진영(Jinyoung Suk) 한국항공우주학회 2022 한국항공우주학회 학술발표회 논문집 Vol.2022 No.11

해설 : 형식증명을 위한 항공기 구조물의 손상허용 평가

최주원 ( J. W. Choi ),진영권 ( Y. K. Jin ),박종혁 ( J. H. Park ),이광희 ( K. H. Lee ),신대원 ( D. W. Shin ) 한국항공운항학회 2002 한국항공운항학회지 Vol.10 No.1