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Analysis of Lunar Landing Strategy for Chang’e-3 Utilizing Image Process Result
Guee Won Moon(문귀원) Korean Institute of Information Scientists and Eng 2023 정보과학회논문지 Vol.50 No.5
China’s first lunar lander, Chang’e-3, successfully landed on the moon in 2013. This research tracks movement of a lunar crater in the real-time lunar landing video of Chang’e-3 and combines altitude & time information shown in the video to extract 4-dimensional behavior just before the lunar landing. For this purpose, one crater edge in the lunar surface image at an altitude of 129m is selected as a feature point. It is continuously traced by computational image process while descending to an altitude of 50 m, which is the most decisive section in the successful moon soft landing. This research restores realistic details of landing behavior including hovering and obstacle avoidance maneuvers of Chang’e-3 and analyzes the success strategy of lunar landing.
문귀원(Guee Won Moon),이훈희(Hoonhee Lee),류동영(Dong Young Rew) 한국정보과학회 2020 정보과학회 컴퓨팅의 실제 논문지 Vol.26 No.6
달 착륙 과정에서는 달 표면을 실시간으로 촬영하여 자율 항법을 위한 정보를 계산하게 된다. 카메라를 통해 취득한 영상은 잡음 및 그림자 등의 불필요한 데이터가 포함되어 있어 항법 정보로써 의미가 있는 영역에 대한 사전 처리가 필요하다. 본 논문에서는 이러한 사전처리 과정의 최적화 방법을 소개하고 신뢰성 있는 항법정보 추출방안에 대한 추후 전략을 기술한다. Real-time imaging of the lunar surface is necessary to retrieve the information required for autonomous navigation during a lunar landing. Since any image taken by a camera includes useless data such as noise, shadow, etc., it should be preprocessed to help draw out the meaningful navigation data. In this paper, a few preprocessing methods for a crater image are introduced and a strategy to secure reliable navigation information is proposed.