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A Study on a Terrain Scan Data Generation Algorithm Using Digital Terrain Elevation Data (DTED)
유문규,강승훈,이현주,장대성,이상철 한국항공우주학회 2023 International Journal of Aeronautical and Space Sc Vol.24 No.5
In this paper, new methods have been proposed that can be applied to the existing terrain scan data generation (TSDG) algorithm. The algorithm is to acquire terrain scan data (TSD) by radiating multiple radar beams at various elevations while maintaining a constant azimuth. The TSDG algorithm consists of the following steps, including calculating the beam direction and the number of beams to be radiated after receiving the terrain scan command, generating measured terrain data from each beam, and merging the measured terrain data into TSD. However, the existing TSDG algorithm still needs practical improvements in acquiring TSD under specific conditions. To address these issues, new methods have been proposed for acquiring terrain data inside the beam and visibility analysis. Through simulation, it has been verified that a new TSDG algorithm combined with the proposed methods improved the existing TSDG algorithm and can be applied to the terrain following (TF) simulator.
디지털 지형 고도 데이터를 이용한 자동 지형 추종 시뮬레이터 개발
이지수(Jisu Lee),유문규(MunGyou Yoo),이현주(Hyunju Lee),송기훈(Ki Hoon Song),전동익(Dong-Ik Cheon),이상철(Sangchul Lee) 항공우주시스템공학회 2024 항공우주시스템공학회지 Vol.18 No.1
본 논문에서는 디지털 지형 고도 데이터를 이용한 자동 지형 추종 시뮬레이터를 제안하였다. ATF Simulator는 Flight Simulator, Radar Simulator, TFC Simulator로 구성하였다. 지형 추종에 필요한 지형 정보로 디지털 지형 고도 데이터와 디지털 지형 고도 데이터를 이용하여 생성한 레이다 스캔 데이터를 활용하였다. ATF Simulator는 디지털 지형 고도 데이터를 이용하는 Passive mode, 레이다 스캔 데이터를 이용하는 Active mode, 두 가지 모두 이용하는 Hybrid mode로 세 가지 운용모드를 제공한다. LabVIEW 개발 환경과 MATLAB App Designer 개발 환경을 통해 지형 추종 시스템 개발에 소요되는 비용 및 시간을 줄일 수 있는 ATF Simulator를 개발하였으며 기능요구사항을 충족하는지 확인하여 검증하였다. In this paper, an Automatic Terrain Following (ATF) Simulator using Digital Terrain Elevation Data (DTED) was proposed. This ATF Simulator consists of a Flight Simulator, a Radar Simulator, and a Terrain Following Computer (TFC) Simulator. DTED and radar scan data generated with DTED were used as the terrain information necessary for terrain following. The ATF Simulator provides three modes of operation: a passive mode that uses DTED, an active mode that uses radar scan data, and a hybrid mode that uses both. We developed an ATF Simulator that could reduce the cost and time required to develop a terrain following system using the LabVIEW development environment and the MATLAB App Designer development environment. It was verified by confirming that the ATF Simulator met all functional requirements.
반응표면법을 이용한 상용 수소 전기 대형 트럭 배터리 캐리어 경량화 모델 설계의 제안
황순재,오민성,설우철,유문규,정영구,홍석무 한국생산제조학회 2023 한국생산제조학회지 Vol.32 No.5
This study optimized the shape of the battery carrier to reduce weight in response to the increasing battery capacity required for commercial hydrogen electric heavy trucks. The Response Surface Method (RSM) was utilized to optimize the frame design while maintaining the same stress level as the conventional frame model. An optimal design was realized by substitute the material of battery frame from steel to aluminum and in addition reinforcing it with glass fiber sheet molding compounds (GF-SMC). Four design variables were identified to adjust the frame thickness to reduce the frame weight. The objective function was set as minimizing the weight of the battery carrier while maintaining stress levels equivalent to the conventional frame model using steel. The predicting accuracy from RSM shows a good result as 98%. Consequently, the proposed model achieved a weight reduction of 29.7% compared to the conventional model at the same stress level.