• 항공우주시스템공학회지
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• 제7권3호
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• pp.39-44
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• 2013

On this study, climb performance related airworthiness requirements for small airplane on KAS Part 23 and flight test techniques for climb performance (Sawtooth climb) are introduced. Also, applicable procedures, test conditions and required test parameters of sawtooth climb flight test techniques are reviewed.

• 한국항공우주학회지
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• 제37권9호
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• pp.931-938
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• 2009

비행시험은 개발 항공기의 다양한 성능검증을 포함하여 감항기술기준에 대한 안전성을 입증하는 최종시험으로서 중요성이 크다. 특히, 민간 항공기의 비행시험은 개발업체의 경험 및 노하우에 의해 기술 보호성격이 강하며, 다양한 시험항목과 비행조건에 의해 비용이나 시간측면에서 효율적인 비행시험 수행 및 비행시험 기법의 확보는 필수적이다. 본 논문에서는 이륙 및 착륙성능 입증을 위한 이착륙 비행시험에 대해 지상관측법과 DGPS를 활용한 비행시험 기법을 제안하고 실제 비행시험을 수행하여 그 결과를 비교하였다.

• 스마트미디어저널
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• 제10권3호
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• pp.54-59
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• 2021

항공기 개발과정 중 비행 계측장비를 통하여 획득된 비행 데이터는 항공기 개발 및 성능 개선에 중요한 역할을 한다. 따라서 비행 계측장비의 신뢰성 확보가 요구됨에 따라 비행 계측장비의 건전성을 점검하기 위한 점검 시스템이 매우 중요하다. 본 논문에서는 비행 데이터 계측장비의 기존 점검 시스템을 분석하여 점검 시스템의 하드웨어 및 소프트웨어 측면의 개선점을 제시한다. 이를 바탕으로 성능이 개선된 점검 시스템을 설계 및 구현하고, 시험 결과를 제시한다. 성능이 개선된 점검 시스템은 기존 점검 시스템보다 비용 절감과 유연한 적용, 그리고 유지보수성이 향상되었다. 따라서 계측장비의 건전성을 확보할 수 있어 비행 데이터의 신뢰성 향상을 기대할 수 있다.

• International Journal of Aeronautical and Space Sciences
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• 제8권1호
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• pp.32-45
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• 2007

The T-50 advanced supersonic jet trainer employs the Relaxed Static Stability (RSS) concept to improve the aerodynamic performance while the flight control system stabilizes the unstable aircraft and provides adequate handling qualities. The T-50 flight control laws employ a proportional-plus-integral type controller based on a dynamic inversion method in longitudinal axis and a proportional type controller based on a blended roll system with simple roll rate feedback and beta-betadot feedback system. These control laws are verified by flight tests with various maneuver set flight envelopes and the control laws are updated to resolve flight test issues. This paper describes several concepts of flight control laws used in T-50 to resolve those flight test issues. Control laws for solving the roll-off problem during pitch maneuver in asymmetric loading configurations, improving the departure resistance in negative angle of attack conditions and enhancing the fine tracking performance in air-to-air tracking maneuvers are described with flight test data.

• 제어로봇시스템학회논문지
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• 제14권8호
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• pp.824-836
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• 2008

Relaxed static stability(RSS) concept has been applied to improve aerodynamic performance of modern version supersonic jet fighter aircraft. Therefore, flight control systems are necessary to stabilize an unstable aircraft, and provides adequate handling qualities and achieve performance enhancements. Standard FCSDVP (Flight Control System Design and Verification Process) is provided to reduce development period of the flight control system. In addition, if this process is employed in developing flight control system, it reduces the trial and error for development and verification of flight control system. This paper addresses the flight control system design and verification process for the RSS aircraft utilizing design goal based on military specifications, linear and nonlinear system design and verification based on universal software, handling quality test based on HILS(Hardware In-the-Loop Simulator) environment, and ground and flight test results to verify aircraft dynamic flight responses.

• 한국항공운항학회지
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• 제24권4호
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• pp.81-86
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• 2016

Unmanned aerial vehicles(UAVs) are increasingly used in civilian areas as well as in military areas due to the technological advancement of UAVs. In response to the increasing demand in UAVs, many studies are under way to integrate the airspace between manned aircraft and UAV. The development of flight test can secure the performance and flight characteristics of the designed aircraft. And the capability of research and development can be expanded through the accumulation of technical data. It is also essential to verify the correct performance and characteristics of development aircraft themselves. In this paper, we propose development flight test procedures and items for civilian UAVs.

• 제어로봇시스템학회논문지
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• 제14권12호
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• pp.1244-1252
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• 2008

This paper presents the analysis results obtained by the flight test of reconfiguration flight control system for an aircraft. The reconfiguration flight control system was designed by using control allocation scheme that automatically distributes the demanded control moments determined by control law to each actual control surface. In this paper, some control allocation algorithms for reconfiguration control of general aircraft with redundant control surfaces are summarized and their performance evaluation results through nonlinear simulation and Hardware-In-the-Loop-Simulation (HILS) test are shown. Also, Unmanned Aerial Vehicle (UAV) system adopted as a platform for the flight test of reconfiguration flight controller and the implementation procedure of reconfiguration flight controller into real-time UAV system were introduced. Finally, flight test results were analyzed.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1998년도 춘계학술대회논문집
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• pp.167-172
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• 1998

Methods of evaluating the physiological activity of the living body are EEG, EOG, Heart rate, and Rectal temperature, etc. In the study of Hagiwara and Araki(1993), they found positive correlations among performance test, physiological measurement, and subjective feeling measurement. Human alertness of pilot directly influences on the flight performance that accomplishes a lot of vigilance task and procedure execution in flight. Accordingly, this paper deals with the quantitative and objective performance test based on tracking error and reaction time by means of the new computer test program into which the perception-motion system of human beings is applies. Throughout this experiment using performance thst, the results suggest that performance capability in state of sleep deprivation 2 hours and alcoholic 0.05 .apaprox. 0.06% in blood were more impaired than one in a normal state, and they further showed statistically significant differences between them, which were influenced by impairment factors of body regulation and pilot's grade. We also obtained the prediction value and the 95% confidence interval of tracking error and reaction time at the normal state for the purpose of distinguishing performance capability between the normal state and the abnormal state. And it is ecpected that the evaluation of human alertness using performance test will be applied to the quantitative assessment of an each pilot's realistic consciousness/attention, and will lead a flight commander to the accurate decision of mission approval prior to a flight.

• 융합정보논문지
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• 제10권9호
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• pp.147-153
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• 2020

드론 산업이 최근 4차 산업 혁명을 주도하는 분야로 발표되면서 드론 시장을 창출하기 위해 많은 투자와 연구가 이루어지고 있다. 그러나 드론 시험비행에 대한 수요가 급격히 증가함에 따라 고흥 항공센터만으로는 시험비행 요구를 충족시키기가 어려우며, 드론과 같이 신규 개발하였거나 기존 형상을 개조한 비행체가 비행시험장이 아닌 곳에서 시험비행을 수행할 시 예측할 수 없는 비행성능이나 조종 미숙으로 인한 잠재적 사고 위험성을 가지고 있다. 따라서 유인 및 무인 항공기의 안전 검증을 위해 충분한 시험비행 공간의 확보가 필수적이다. 따라서 본 연구는 국내 비행시험장의 상태와 ICAO DOC 9184-AN / 902 Part 1을 분석 하여, 종합적인 비행 테스트 인프라를 구축하기 위한 비행 테스트 사이트 예비 평가 방법과 인프라 사이트 평가 방법을 제시하였다.

• 항공우주시스템공학회지
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• 제14권2호
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• pp.12-19
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• 2020

In Korea, the regulation is MOLIT Notice 2018-290, Guidance for Approval of Synthetic Flight Trainer as Flight Simulator and Flight Training Device. The FAA (Federal Aviation Administration) categorizes FSTD (Flight Simulation Training Device) into FFS (Full Flight Simulator) and FTD (Flight Training Device), according to its level. Additional categories for regulation are airplane and helicopter, depending on the type of aircraft. In this study, the objective tests for the handling quality of the FAA and Korean regulations were compared and analyzed. In QPS (Qualification Performance Standard), related test titles, flight conditions, and tolerance limits were analyzed for the handling quality. Based on this study, recommendations on amendments to the regulation was presented.