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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.
u-City 사업 모델에 객체 정보 기술 적용을 위한 개념 연구
이상효(Lee Sang-Hyo),김회율(Kim Whoi-Yul),김병수(Kim Byeoung-Su),김주형(Kim Ju-Hyung),이윤선(Yoon Ja-Young),김재준(Kim Jae-Jun) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Recently, As a new value-added part which Construction Industry can create, U-City Construction Project is in the spotlight. Especiaaly, in the case of U-city, various business models integrated with Ubiqutous IT technology, is being suggested and it is expected that these models would play an important role in changing the construction industry centered around the design and construction into maintenance service for client. It is considered that these U-city service models would require visualization model and human movement on limitted space involved in client interface, and spatial phase information and spatial attributes to control various spatial situation. These spatial information models is not reproduced by IT technology, but is considered to be so effective under the relation with object information technology. So in this paper, as the fundamental research for the integration of object information technology of construction and Ubiqutous IT technology, application of object information would be defined and plans to classify U-city project models would be proposed. Through this process, U-City models is expect to be applied for not only integration of construction information and Ubiqutous IT Technology, but also useful reference models on the plans to associate object information technology design and execution of construction project and maintenance process.
이상효(Lee Sang-Hyo) 한국체육과학회 2001 한국체육과학회지 Vol.10 No.1
The purpose of this study is to ultimately suggest desirable measure for compilation of sport budget of local government. Subjects of this study were financial self-support and sport budget of 25 local government(ward office} in Seoul metropolitan government. For this purpose, an influence of financial self-support on compilation of sport budget was analyzed utilizing year 2000 budget. To analyze the data, correlation and simple regression analysis was used. The followings were major conclusion made from data analysis. Financial self-support has influence on sport budget total except sport facility fee, operation fee of sport classes and support fee for sport club but not on sport budget total, sport event fee hosted by local government and sport facility fee.
T-50 고등 훈련기 엔진/기체 적합성 검증을 위한 추진계통 비행시험
이상효(Sang-Hyo Lee),정인면(InMyon Jeong),정주현(JooHyun Jung),심재광(JaeKwang Shim),강성수(SungSoo Kang),박성환(SungHwan Park),한병학(ByoungHak Han),문형래(HyungRae Moon),차재병(JaeByoung Cha),이부일(BooIl Lee) 한국항공우주학회 2007 韓國航空宇宙學會誌 Vol.35 No.10
항공기를 개발함에 있어 기체를 구성하는 계통의 성능이 항공기 요구도를 만족하는 수준으로 발휘되는지 확인하는 것이 중요하다. 특히, 엔진을 포함한 추진계통은 항공기를 구성하는 구성품 중 중요한 계통으로서, 추진계통과 기체와의 통합성을 검증하는 것이 항공기 개발에 있어 필수적 요소이다. T-50 고등훈련기 체계개발 시 추진계통 검증을 위해 엔진 공중재시동 시험 및 엔진 축마력 시험, backup throttle기능 시험 등의 다양한 비행시험을 수행하였으며, 이와 같은 항목의 비행시험을 통하여 T-50 고등 훈련기의 추진계통이 기체에 적합하게 설계/장착되었음을 확인하였다. 본 논문에서 추진계통 비행시험 항목에 대한 설명 및 시험 절차, 결과를 제시하였으며, 본 논문의 내용이 차후 타 항공기 개발 시 추진계통 관련 비행시험을 준비하는 과정에서 참고가 될 수 있을 것으로 기대한다. It is important during FSD(Full Scale Development) period to verify whether the aircraft system function meets the aircraft requirements and functional performance. Especially, the functionality of the integrated propulsion system should be verified to evaluate the compatibility with aircraft. Various flight tests such as the engine airstart test, the engine horsepower extraction test, the backup throttle functionality test had been performed to evaluate the engine/aircraft compatibility with T-50 during FSD period. Through such flight tests, it was confirmed that the propulsion system of T-50 was properly designed and installed to the aircraft. This paper shows description on each flight test item, test procedure and test results. It is expected that this paper could be a reference for preparing the propulsion flight test in other aircraft developments.