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Terrain Relative Navigation for Precise Lunar Landing using Crater Matching Algorithm
Woosang Park,Youeyun Jung,Hyochoong Bang 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10
Under GPS-denied conditions, an inertial navigation diverges easily due to integration drift in the measurement of acceleration and angular velocity. Therefore, a terrain relative navigation (TRN) is applied to correct the drift error for precise lunar landing mission. Diverse sensors are used for the TRN in these days, such as a Light and Detection and Ranging (LIDAR), laser altimeter, and optical camera. TRN algorithms can improve navigation performance by combining inertial navigation data and terrain measurement data from those sensors. In this paper, a simulation of TRN with an optical camera, IMU by using crater matching algorithm is performed. The craters made by colliding with other solid body can remain longer on the lunar surface without being eroded, because there is no air and liquid water in the Moon. Therefore, it can be utilized as appropriate features for TRN even in lost in space.
BIM 활용 건축-엔지니어링간 협업지원시스템 필수기능도출에 관한 연구
김우상(Kim, Woosang),박문서(Park, Moonseo),이현수(Lee, Hyun-Soo),이진강(Lee, Jingang),이광표(Lee, Kwang-Pyo) 대한건축학회 2015 대한건축학회논문집 Vol.31 No.2
In a construction project, there are numerous information across various professional specialists. In particular, as design process requires constant communication among a variety engineering participants, effective collaboration for decision making has a high influence on productivity. BIM (Building Information Modeling) is adopted globally to improve the productivity of the collaboration. However, BIM causes a fundamental change in the way participants interact with each other. Currently, it is not easy for individuals to utilize the current BIM collaboration systems due to skeptical opinion and difficulties of the systems. Therefore, the collaboration system should be developed by considering optimized features, and this paper defines essential features of architecture-engineering design collaboration system to improve BIM collaboration environment. In order to conduct this research, (1) the current BIM collaboration systems are investigated and analyzed in depth and (2) the essential functions for the design collaboration between the architects and engineers within the BIM environment are defined by conducting delphi survey and focus group interview. The result of this research can contribute to provide the basis for improving BIM based collaboration environment.