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항공관제 훈련 시뮬레이터를 이용한 착륙 순서 최적화 알고리즘의 검증
고동현,오혜주,최기영 한국항공우주학회 2013 한국항공우주학회 학술발표회 논문집 Vol.2013 No.11
본 논문에서는 복수 항공기의 최적 착륙 순서를 제시하는 알고리즘을 개발하였다. 알고리즘의 제한 조건은 항공기 안전거리이며, 최적화 변수는 복수의 항공기가 착륙하는데 필요한 총 시간이다. 안전거리 유지 알고리즘은 선형계획법으로 구성하였고, 총시간을 계산하는 알고리즘은 항공기의 궤적예측과 속도를 고려하여 개발되었다. 본 연구에서는 알고리즘의 신뢰성을 높이기 위하여 검증된 항공관제 훈련 시뮬레이터를 이용하여 알고리즘을 검증하였다. In this paper, we have developed an algorithm that presents the optimal landing order of multiple aircraft. Constraints condition of the algorithm is a safe distance and optimization variable is the total time required for aircraft to land. Algorithm of maintenance a safe distance is consist of mixed integer linear programming and calculate total time algorithm is developed by considering trajectory prediction and aircraft velocity. In this study, we tested the algorithm on the training of air traffic control simulator, which has been proven to increase the reliability of the algorithm.
BADA정보에 기반한 항공기 운용제한을 반영한 항공기 도착관리의 최적화
고동현,최기영 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.4
본 논문에서는 항공기의 비행 영역 보호 기능을 포함한 도착관리 알고리즘을 제안한다. 제안하는 알고리즘의 항공기 비행 영역 보호는 항공기의 현재 상태와 관제사의 명령을 통해 항공기의 비행 영역을 결정하도록 구성 되어 있다. 그리고 도착 관리 알고리즘은 항공기의 경로점 속도 명령 최대화를 통해 공항을 최적으로 운용하도록 하였다. 제안하는 알고리즘의 신뢰성을 향상시키기 위해 검증 시나리오는 AIP문서를 기반으로 작성하였으며 알고리즘의 검증 도구는 항공관제 시뮬레이터를 이용하였다. This paper presents an algorithm for aircraft landing schedule management reflecting performance limitations of aircraft. Flight envelope protection algorithm uses of air traffic controller command and current aircraft states. Also aircraft landing problem algorithm optimally operates airport at maximum waypoint velocity command of aircraft. Proposed algorithm is applied for test cases which are based on AIP document and verified air traffic simulator.
고동현,김성준,Zhenyu Jin,신석희,이선영,민요셉 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.7
This study describes a novel chemical route to grow ZnS thin films via atomic layer deposition (ALD). By using diethylzinc and 1,5-pentanedithiol as precursors of Zn and S, respectively, ZnS films are grown on substrates with an atomic precision by repeating self-limiting chemisorption of each precursor. The growth-per-cycle of the ALD process is around 0.1 Å per cycle at 150°C, and the as-grown films are characterized to be amorphous ZnS by X-ray diffraction and X-ray photoelectron spectroscopy.
Lightweight Design Method for Bike Frames Using Topology Optimization under Multiple Loads
고동현,신동석,전의식 사단법인 한국융합기술연구학회 2023 아시아태평양융합연구교류논문지 Vol.9 No.1
Mobility is a complex transportation consisting of not only frames but also seats, sensors, and steering systems. Among them, the frame is an important structure that determines the safety and performance of the device as a part that supports the load by combining all other components and receives external impact. It is necessary to study the skeletal design of the frame of mobility devices to achieve a safe and simple structure. This study proposed a conceptual design method for a skeletal mobility frame. An optimized frame design was investigated for multiple loads using a topology optimization technique in automotive parts design. Finite element modeling was conducted by measuring the actual model, and finite element analysis (FEA) was performed. Post-processing was performed along with FEA. Furthermore, finite factor analysis was performed on the post-processed model and was compared with the conceptual model. Results of the study revealed that compared with the conceptual model, the weight of the design model decreased by 93.7%. This process was carried out through computer modeling and computer simulation, and it was possible to avoid separate prototyping and evaluation. Furthermore, Through this research process, the optimal skeletal structure was extruded based on the optimal topology design results for multiple loads. During the optimization process, the maximum strain and stress satisfied the yield condition of the material, proving the safety of the structure. It is believed that this research process can be used for designing other mobilty frames that require an engineering design method.