• Title/Summary/Keyword: Helicopter Pilot

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Handling Quality Improvements of Fly-By-Wire Helicopter using Combined Model Following Controller with Decoupler

  • Lee, Jangho;Kim, Eung-Tai;Ryu, Hyeok;Shim, Hyunchul
    • International Journal of Aeronautical and Space Sciences
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    • v.18 no.2
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    • pp.378-387
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    • 2017
  • The combined model following control (MFC)-decoupler system is employed for a full authority fly-by-wire utility helicopter to enhance handling qualities. The MFC, which governs the vehicle to follow the prescribed model, is widely employed for modern helicopters. However, it may not be sufficient as helicopters often suffer significant cross coupling. The coupled responses between control axes of a helicopter increase the pilot's work load and may degrade handling qualities. As the decoupler is introduced to the MFC, the combined MFC-decoupler effectively solves the coupling problems and enhances handling qualities. The proposed system is verified via the handling qualities prediction using the mathematical dynamics model. The analysis results are confirmed through the piloted simulation.

Performance Analysis of Machine Learning Based Spatial Disorientation Detection Algorithm Using Flight Data (비행데이터를 활용한 머신러닝 기반 비행착각 탐지 알고리즘 성능 분석)

  • Yim Se-Hoon;Park Chul;Cho Young jin
    • Journal of Advanced Navigation Technology
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    • v.27 no.4
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    • pp.391-395
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    • 2023
  • Helicopter accidents due to spatial disorientation in low visibility conditions continue to persist as a major issue. These incidents often stem from human error, typically induced by stress, and frequently result in fatal outcomes. This study employs machine learning to analyze flight data and evaluate the efficacy of a flight illusion detection algorithm, laying groundwork for further research. This study collected flight data from approximately 20 pilots using a simulated flight training device to construct a range of flight scenarios. These scenarios included three stages of flight: ascending, level, and descent, and were further categorized into good visibility conditions and 0-mile visibility conditions. The aim was to investigate the occurrence of flight illusions under these conditions. From the extracted data, we obtained a total of 54,000 time-series data points, sampled five times per second. These were then analyzed using a machine learning approach.

Effectiveness Analysis of Helicopter Flight Simulator and Actual Flight Training: Focused on Instrument Flight Training (헬리콥터 비행 시뮬레이터와 실 비행훈련과의 효과 분석: 계기비행 훈련을 중심으로)

  • Kim, Sang-chul;Kim, Jong-min
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.28 no.1
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    • pp.75-82
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    • 2020
  • To compare and analyze the differences between flight simulation and actual flight among 130 army helicopter pilot training subjects, the correlation analysis was performed first through t-testing and multiple regression analysis of individual characteristics and flight simulation and actual instrument flight training, which were analyzed significantly in the age (a3) and service classification (a5) of the six verification factors. This has been shown to be significant, with no difference between the flight simulator and the actual flight. Second, in order to study the correlation between aircraft types, the flight evaluation (v1) was analyzed as a dependent variable for the performance of the flight simulator (KUH: s2, UH60: s3, AH-1S: s5, UH-1H: s6), and the results of the multiple regression analysis of the flight simulator evaluation (s1) were analyzed, in contrast, as a dependent variable, and in conclusion, the training of the flight simulator provided statistical data on the possibility of replacing the actual flight training, which is thought to contribute to the orientation, budget reduction and aviation safety of the pilot training.

A Study on the Improvement of Education through the Correlation Analysis of the Situation Awareness and Education Satisfaction of Helicopter Pilots (헬리콥터 조종사의 상황인식과 교육 만족도의 상관분석을 통한 교육개선연구)

  • Kim, Sang-chul;Lee, Oyong-hyeok
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.29 no.1
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    • pp.82-91
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    • 2021
  • The topic of this paper was analyzed as "t -test" and "multiple regression analysis" for 303 helicopter pilot trainees from aviation schools in the county for "improvement of education through correlation analysis of helicopter pilots' situational awareness and education satisfaction." In addition to the factors for overcoming situational awareness and situational awareness, the level of satisfaction of the instructor and the level of satisfaction of the learning management system (LMS) is the confidence interval p<.05, 95%. It was analyzed to be significant at the level of 05, 95%. Therefore, it was analyzed that in order to improve the "quality of the instructor" in future education, institutional supplementation and "learning management system (LMS)" need to be established including VR and AR so that pilot trainees can use it at all times.

Anthropometric Analysis of Korean Helicopter Pilots for Helicopter Cockpit Design (헬리콥터 조종실 설계를 위한 헬리콥터 조종사 인체측정 및 분석)

  • Jung, Kih-Yo;Jo, Ja-Young;Jeong, Jeong-Rim;Park, Ji-Eun;Lee, Won-Sup;Uem, Joo-Ho;Lee, Joung-Hyo;Kang, Byung-Gil;Kim, Hee-Eun;Park, Sei-Kwon;You, Hee-Cheon
    • Journal of the Ergonomics Society of Korea
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    • v.27 no.4
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    • pp.37-44
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    • 2008
  • To design the cockpit of Korean helicopter, anthropometric data for Korean helicopter pilots as a target population is necessary. The present study measured the body sizes of Korean helicopter pilots to design the cockpit of Korean helicopter, and compared the measurements with those of Korean civilian and the US Army. The sample size was 100 which determined by a statistical analysis. Anthropometric measurements were collected for 100 samples (male = 94, female = 6; age group = 20~40) of Korean helicopter pilots by applying standard measurement protocol. To compare three anthropometric data, Korean civilian and US Army data were controlled by considering age group (20~40) and gender ratio (male: female = 9:1) of Korean helicopter pilots. The average body sizes of Korean helicopter pilots were mostly similar to those of Korean civilian, however, lower limb related variables (hip breadth, popliteal height and thigh clearance) and shoulder-to-elbow length were significantly greater (1~7%) at α=0.05. Furthermore, the average body sizes for Korean helicopter pilots regarding lower limb length and thickness were significantly smaller than those of the US Army (1~12%); however, the average body sizes for Korean helicopter pilots regarding upper body related variables (sitting height, sitting eye height, and acromial height) and hip breadth were significantly greater (0.7~1.9%). Lastly, size variability for Korean helicopter pilots was significantly smaller than those of Korean civilian and the US Army. Anthropometric data for Korean helicopter pilots of the present study was applied to design and evaluate a Korean helicopter cockpit.

Flight Envelope Load Factor Limit Logic Design for Helicopter Fly-By-Wire Controller (전자식 조정장치 헬리콥터의 하중 비행영역 제한 로직 설계)

  • Choi, In-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.1
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    • pp.159-164
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    • 2016
  • This paper reports the load factor logic design for a fly-by-wire helicopter flight envelope protection. As a helicopter is very complex system with a rotor, fuselage, engine, etc., there are many constraints on the flight region. Because of these constraints, pilots should consider them carefully and have a heavy workload, which causes controllability degradation. In this respect, automatic logic is needed to free the pilot from these considerations. As one of these logics, the flight envelope protection logic for the load factor of a FBW helicopter was designed. The flight to exceed the load factor is caused by an abrupt pitch cyclic stick change. In this scheme, the load factor limit logic was added between the pilot stick command block and pitch attitude command block. From the current load value, the available attitude range was calculated dynamically and simulated on the helicopter simulator model to verify the performance. A comparison of the simulation results at the hovering and forward speed region with and without applying the load limiting logic showed that the load factor limit was exceeded more than 20% when the logic was not applied, whereas with the load factor limit logic the load factor was within the limit. In conclusion, a dynamically allocated limitation logic to helicopter FBW controller was verified by simulation.

A Study on the Development of Control Loading System for Helicopter Flight Training Device (헬리콥터 비행훈련장치용 조종력재현장치의 개발에 관한 연구)

  • Han, Dong-Ju;Lee, Sang-Haeng
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.31 no.10
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    • pp.1031-1038
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    • 2007
  • A study on the development of control loading system for a pilot command in the helicopter flight training device is performed. The key issue of the device is how to provide closely the real feeling of the stick forces to the trainer during the flight training. Focusing on this proviso and considering the suitable approach than the complexity of the hydraulic system, we adopt the AC servo motor system although its inherent disadvantages such as the torque ripple and the stick-slip friction effect at a low control force. However, we overcome these detrimental effects by introducing the appropriate control device and the robust structural design of the actuating system, thereby the feasibility and applicability to the system can be obtained by showing good performance, meeting the required specification.

Analysis of Handling Qualities for Smart Unmanned Aerial Vehicle in Helicopter Flight Mode (스마트 무인기의 회전익 모드 비행성 분석)

  • Lee, Jang-Ho;Kim, Eung-Tai
    • Journal of Advanced Navigation Technology
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    • v.9 no.2
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    • pp.185-192
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    • 2005
  • The aim of this paper is to analyze handling qualities of tiltrotor aircraft(TR-S4) in helicopter flight mode including hovering and forward flight. Analysis of handling qualities is composed of aircraft response to control inputs that effect on stability and controllability. In short term response analysis, bandwidth is the critical parameter for small amplitude motions since it relates to the ability of a pilot to crisply start and stop maneuver. The handling qualities of TR-S4 in helicopter mode are analyzed with a SAS and an attitude controller and are satisfied level 1 in almost criteria with simulation of TR-S4 6-DOF nonlinear model.

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Development of Motion-Based Helicopter Flight Simulation Training Device (모션 기반 헬리콥터 시뮬레이터 개발 연구)

  • Na, Yuchan;Cho, Youngjin
    • The Journal of the Convergence on Culture Technology
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    • v.8 no.3
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    • pp.477-483
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    • 2022
  • A flight simulator is a device that allows pilots attain proficiency of various situations and a sense of flight, and as interest in scientific training increases in modern aviation, aviation training organization develop and operate simulators. Therefore, in this study, the process of developing a motion-based helicopter simulation Training Device using a commercial program. Citing previous studies, the specificity of helicopter flight education and the positive effect of motion simulators were confirmed. In addition, the design and program of the motion device were studied in the process of checking the configuration and current regulations of flight simulation training devices and developing a helicopter motion simulator. A motion program was set based on the system design and structural design of the flight simulator, and data received from the flight simulator was identified to confirm the expected operating shape. Through this study, we intend to create a positive expected effect on pilot training by completing a motion-based helicopter simulator.