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6자유도를 고려한 회전익 항공기 착륙장치의 동특성 해석
박완수,황재업,현영오,황재혁,배재성,김태욱,Park, Wansoo,Hwang, Jaeup,Hyun, Youngho,Hwang, Jaehyuk,bae, Jaeseoung,Kim, Taewook 항공우주시스템공학회 2008 항공우주시스템공학회지 Vol.2 No.1
In this paper, full body modeling and analysis of nose and main landing gear's characteristics of a helicopter are performed using the dynamics analysis program ADAMS. Also, when land limiting about helicopter body's degree-of-freedom, compared the characteristics. In the case of helicopter, because there are a lot of dangerous missions under flight condition that is disadvantageous than fixed wing airplane, need more detailed research for a helicopter.
김기현,김경래,박완수,이은재,황영규,Kim, Kihyun,Kim, Kyungrai,Park, Wansoo,Lee, Eunjae,Hwang, Youngkyu 한국건설관리학회 2014 한국건설관리학회 논문집 Vol.15 No.2
On March, 2013, the Government announced the Multiple Prime Contract method will be expanded in public building construction projects. The applying multiple prime contract method has been immersing issue among all stakeholders of construction project. The owner conducts the role of a general contactor as well as owner's original responsibility while construction works being executed by specialty contractors. If the owner has not experience of project management, it should be bring about increasing management cost due to the interface problems among prime contractors. With this reason, it is difficult to administrate the multiple prime contract. So far there has been no methodology of predicting management cost in the multiple prime contract. Therefore, this study aims to enable the operation of efficient multiple prime contracts by developing a model to predict their management costs. 2013년 3월 정부에서는 공공공사에 분리발주방식을 확대적용하는 정책을 발표하였다. 분리발주방식의 도입을 두고 건설참여자들의 입장이 첨예하게 대립하게 되고, 건설분야의 뜨거운 이슈가 되고 있는 상황이다. 건설공사 관리의 경험이 부족한 공공발주자가 다수로 분리된 전문공종들을 직접관리하여 인터페이스의 증가에 따른 관리비용 상승, 실적 부족으로 인한 관리비용 산정 기준이 없어 사업운영에 어려움이 있는 현실이다. 따라서, 본 연구에서는 분리발주의 관리비용율 예측할 수 있는 모델을 개발하여 효율적인 분리발주의 운영이 가능하게 하는 것을 목적으로 하고 있다.
홍동술(Dongsool Hong),김호영(Hoyoung Kim),박완수(Wansoo Park),백인열(Inyoul Baek) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Digital Cameras are becoming increasingly compact and developing with high performances. However, the internal space for hear sink design in a camera becomes smaller due to the compact size. Also, as cameras are hand-held products, the surface temperature, an element for the emotional quality consumers feel, should meet the production standards, and the producers are making efforts to lower the temperature. Accordingly, the surface temperature of the camera case becomes important, so securing thermal technologies is needed to solve the problem regarding the lack of internal space and the quality appealing to customers emotionally. As a result of the simulation to lower the surface temperature of the case, adjusting thermal conductivity and radiation, the temperature decreased by 10 degrees Celsius under thermal conductive plastic case. The adjustment of radiation from the Main Frame hardly affected the result.