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T/A-50 엔진 축마력(Horsepower) 능력 해석 및 비행시험 검증
이상효(Sang-Hyo Lee),이부일(BooIl Lee),정주현(JooHyun Jung),이상백(SangBaek Lee) 한국항공우주학회 2006 韓國航空宇宙學會誌 Vol.34 No.7
항공기 엔진은 항공기가 각종 기동을 수행하도록 추력을 발생하는 것 외에 기동 수행을 위해 작동되는 조종면에 공급될 유압계통의 동력과 각종 항전장비 작동을 위한 전기 계통의 동력을 공급한다. 엔진으로부터 제공되는 동력은 엔진의 고압압축기로부터 추출되기 때문에 축마력(Horsepower Extraction, HPX)이라하며, 추출되어 제공되는 엔진 축마력이 유압계통과 전기계통에서 요구하는 요구 축마력보다 작게 되면 엔진에 과도한 부하가 걸려 엔진회전수 감소(Rollback) 및 심한 경우 실속(stall)등이 발생할 수 있다. T/A-50체계개발 동안 요구 축마력과 엔진의 공급 축마력에 대한 비교 해석을 수행하였고, 해석 결과 엔진 축마력이 요구 축마력보다 직은 것을 확인하였다. 엔진 축마력 증가를 위한 엔진제어 스케쥴 변경이 수행되었으며, 변경된 제어 스케쥴이 장착된 엔진을 이용하여 T/A-50비행시험을 수행하였다. 비행시험 결과를 통해 해석 결과 및 변경된 제어 스케쥴의 타당성을 검증하였다. The aircraft engine is to generate thrust for the maneuver of aircraft and to provide the power to the related hydraulic system and electrical system. Since the power provided to the systems is extracted from the high pressure compressor of aircraft engine, the extracted power is called horsepower extraction (HPX). If the HPX provided from the engine is smaller than the HPX required from the related systems, there could be abnormal engine behavior, like engine rollback or stall. Analysis on comparing the required HPX and the engine HPX capability had been performed during the T/A-50 FSD (Full Scale Development) period. The analysis results make the engine schedule changed, and T/A-50 flight test has been performed with the changed engine schedule. The analysis results and changing the engine control schedule were verified to be valid with the flight test results.
HOI 데이터셋의 상호운용성 및 확장성을 위한 온톨로지 구축
김아령(Aryoung Kim),이상백(Sangbaek Lee),이규철(Kyuchul Lee) Korean Institute of Information Scientists and Eng 2021 정보과학회논문지 Vol.48 No.8
Human behavior can be expressed through actions and objects. In order to understand the human behavior, the interaction with objects must be considered, as well as human behavior. The Human-Object Interaction (HOI) can be expressed in rich and varied ways. As detailed representations were required, large-scale datasets were generated. However, as they were written in different file formats and expression methods, decreasing interoperability between each other made it difficult to add, modify, or delete new objects or relationships. In this paper, we constructed a HOI ontology which can be utilized in the field of HOI research. We designed ontology to express the relationship between humans and objects. We then developed a method of instance generation and extension for interoperability support between HOI datasets. The design of the ontology allowed clear identification and expression of extracted information. Moreover, the extension method provided semantic interoperability so that new objects or relationships could be continuously extended to the HOI ontology.