• Title/Summary/Keyword: Helicopter Operation Safety

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Centrifugal Clutch Design for Unmanned Helicopter - Simulation of Optimal Factors - (농용 무인헬리콥터의 원심클러치 설계 - 최적 설계치의 시뮬레이션 -)

  • Lee, J.H.;Koo, Y.M.
    • Journal of Biosystems Engineering
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    • v.34 no.2
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    • pp.89-94
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    • 2009
  • Aerial application using an agricultural unmanned helicopter was suggested for an alternative against current pesticide application methods. Centrifugal clutches play important roles in the performance and safety of the helicopter operation. A previous study analyzed and verified the power transfer theory of the guide type centrifugal clutch. Based on the clutch theory, optimal designs of the clutch became possible and feasible using a simulation method. Design criteria of the clutch were the power transfer capacity of 24.66 kW(33.5 PS) at the rated engine speed and the engaging range speed of 3,000${\sim}$3,500 rpm. Various designs were accomplished using the simulation. An optimal clutch was simulated by determining the values of spring constant and mass of friction sector, which were 94,700 N/m and 123.7 g, respectively. The design performed the power capacity of 24.86 kW(33.8 PS) and engagement speed of 3,069 rpm, meeting the design criteria. Using the designed clutch, an efficient transfer of the power would be possible for the unmanned agricultural helicopter.

A Study on the Helicopter Pilot's Workload Influences by 'Surprise and Startle Effect' in the Abnormal Situation - Comparison by Pilot Certificate (Private and Commercial) - (비정상 상황에서 '놀람과 깜짝놀람의 영향(Surprise and Startle Effect)'이 헬리콥터 조종사의 작업부하(Workload)에 미치는 영향에 관한 연구 - 자격증명(자가용 및 사업용) 조종사의 비교 -)

  • Lee, Seokjong;Lee, Kangseok;Park, Wontae
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.30 no.2
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    • pp.44-54
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    • 2022
  • An empirical analysis was conducted on the workload of helicopter pilots flying in high-risk flight environments such as ground obstacles and weather effects at low altitudes. To evaluate the workload, an independent sample t-test was performed using the NASA-TLX evaluation method most suitable for the aviation field, and the workload score was calculated by applying the analytical stratification method (AHP) to compare and analyze private and commercial pilots. There is a significant difference in mean between private and commercial pilots and the result of work load was obtained over 70%. This paper studied the 'surprise and startle effect' on the helicopter field for the first time. In the future, it is intended to contribute to the safe operation of helicopters by presenting a method for effective safety management by utilizing it in the field of education and training for helicopter pilots and providing basic data for preventing accidents caused by human error.

A Study on the operation of Air Traffic Control System for a Korean Light Aircraft Carrier (한국형 경항공모함 항공관제장비 운영에 대한 연구)

  • Youn-chul Choi;Yong-tae Jung;Young-jin Cho;Do-hyun Kim;Won-hyuk Choi;Yoon-Su Park
    • Journal of Advanced Navigation Technology
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    • v.27 no.2
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    • pp.173-181
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    • 2023
  • Aircraft carriers need to maintain an orderly flow of aircraft in order for military ships to conduct combat through aircraft. Maintaining aircraft flow is an important factor in strengthening ship and aviation safety. In order to maintain aircraft flow, it is essential to develop a state-of-the-art air control system that provides higher quality control information by simultaneously accommodating radar-based monitoring information and monitoring information based on CNS integrated technology. Based on this point, this study describes the function and operation method of specific control equipment for the operation of the Aviation Support System and Air Traffic Control System required to operate light aircraft carriers in Korea based on overseas cases.

A Study on the Urban Air Mobility(UAM) Operation Pilot Qualification System

  • Kim, Su-Ro;Cho, Young-Jin;Jeon, Seung-Mok
    • International Journal of Internet, Broadcasting and Communication
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    • v.14 no.1
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    • pp.201-208
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    • 2022
  • As around the world, ground and underground transportation capacity is reaching its limit, centering on urban areas. As urban traffic becomes congested, time and cost are astronomical, and environmental destruction caused by urban pollution is becoming increasingly serious. As a way to solve this problem, the means of flying over the air are in the spotlight as the next generation of future transportation, and the concept of urban air mobility (UAM, Urban Air Mobility) is defined as systematic planning. The development of an electric-powered vertical take-off (eVTOL) aircraft that obtains electric power through a battery using a personal aerial vehicle (PAV) as a means of transportation has accelerated. As the aircraft development of new technology aircraft in the evtol method is actively carried out, the need to prepare systems such as aircraft certification standards, pilot qualification systems, and qualification management is emerging. The Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA), which lead international standards, announced new special technical conditions and temporary regulations SCVTOL-01, respectively. However, the pilot qualification system for operating the uam aircraft has not yet been clearly announced. Therefore, this paper analyzes the recently announced FAA regulations and EASA regulations to identify differences and directions in perspectives on UAMs and study the existing vertical take-off and landing aircraft (VTOL) pilot qualification system to present directions for qualification classification.

A Study on Needs for JCRM with Pilot and Air Traffic Controllers (조종사와 항공교통관제사의 JCRM 필요성에 관한 연구)

  • Jin Yup Kim;Young-jin Cho
    • Journal of Advanced Navigation Technology
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    • v.27 no.3
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    • pp.247-254
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    • 2023
  • GAIN in the US explained in its Pilot/Controller Collaboration Initiatives report that "pilots and air traffic controllers talk to each other all day long, but they rarely communicate." The starting point for the study was the question of whether differences in flight safety perceptions and culture between pilots and air traffic controllers, or other factors, could lead to mutual misunderstandings of procedures and instructions. Digest with The many processes that must be solved within tight deadlines increase the likelihood of accidents through cascading risk factors such as James Reason's Swiss Cheese Theory. Despite the fact that the pilot-air traffic controller complex, which is the subject of flight, occupies a considerable part, there is no integrated management for safe operation between the two groups. Therefore, this research aims to achieve integrated management of safety and education for safe operation between pilots and air traffic controllers through JCRM..

Design Improvement for Abnormal Display of Fuel Indicator Mounted on the Korean Utility Helicopter (한국형 기동헬기 연료량 지시계 이상시현 현상 설계개선)

  • Kim, Joung-Hun;Kim, Chang-Young;Chang, Joong-Jin;Chang, In-Ki;Jun, Byung-Kyu
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.8
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    • pp.707-712
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    • 2014
  • Aircraft fuel indicator is a device to indicate the amount of fuel remained during flight, where accurate and consistent operation of the indicator should be maintained. Previously the Korean Utility Helicopter fuel indicator sporadically displayed abnormal sign by "8888" during flight, jeopardizing flight safety. Inappropriate EMI/EMC performance was detected during trouble shooting process. The cause of the abnormal display was found to be resulted from unstable power induced by electro-magnetic disturbance and CAN communication error. The aircraft fuel indicator design was improved and the design compatibility was verified to avoid abnormal display.

Development Plan for the Consequence Management in Response to Large-Scale Wildfire Disasters Using Air Force Transport Aircraft (C-130) (공군 수송기(C-130)를 활용한 대형산불 재난 대응 시 사후관리(CM) 발전방안)

  • Sangduk Kim;Minki Kim
    • Journal of the Society of Disaster Information
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    • v.20 no.1
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    • pp.232-243
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    • 2024
  • Purpose: Recently, large-scale forest fires caused by climate change, natural disasters, and human factors have been increasing every year in the East Coast and Taebaek Mountains region. Although forest fire extinguishing using helicopters is currently increasing, the need to introduce air force transport aircraft has continued to be raised due to the importance of early fire extinguishment to respond to large forest fires and the difficulty of extinguishing forest fires between sheep. This study seeks to present a plan for developing a post-fire management system for several aspects - achieving operational objectives, overcoming the operating environment, selecting a staging area, and efficient operation measures - to efficiently perform forest fire extinguishing missions using Air Force transport aircraft. Method: Based on literature research on forest fire extinguishing, forest fire extinguishing experiments using fixed-wing aircraft, and the operation status and operation method of forest fire extinguishing helicopters, the pros and cons of helicopter operation and the effects of large forest fire extinguishing using a large transport aircraft (C-130) Analyze the effectiveness of operation through analysis. Results: When extinguishing a large forest fire, an effective CM (Consequence Management) application plan was derived, including effective operation, control, command system, dispatch request, and forest fire extinguishment when integrating helicopter and fixed-wing aircraft (C-130). Conclusion: The application of the concept of CM (Consequence Management) is partially applied to some areas of chemical, biological, and radiological (CBRNE) protection in Korea, but efficient operation, control, and command systems are established when integrated operation of helicopters and large aircraft (C-130) in forest fire extinguishment. the concept of CM (Consequence Management), which is operated in advanced countries, was applied for safety management, dispatch requests, and forest fire extinguishing, thereby contributing to the establishment of a more advanced disaster and post-disaster management system.

A Study on Quality Improvement for the Prevention of Water Infiltration and Corrosion of Helicopter MRA Control-Rod (회전익 항공기 MRA 조종로드 방수 및 부식 방지에 관한 연구)

  • Lim, Hyun-Gyu;Choi, Jae-hyung;Kim, Dae-Han;Jang, Min-Wook
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.9
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    • pp.92-100
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    • 2017
  • The Helicopter MRA Control Rod System has the important function of controlling the speed, height, and direction of helicoptersby adjusting the main rotor disc. However, the ingress of water into the inner control rod can cause ice damage in the rod during winter operation and also corrosion;these defects need to be rectified. The water flowed into the control rod through the upper side space, and the rod was cracked during icing expansion occurring at low temperature. The corrosion occurred due to the lack of coating process during the manufacturing process. To resolve these problems, the upper rod was sealed to prevent water inflow and a coating process was added to prevent corrosion. These solutions were verified by awaterproof test and a salt fog test. The phenomena, causes and measures were reviewed and the methods of improvement were established and proven. This proposed technology to prevent water infiltration and corrosion will contribute to the safety of rotary wing aircraft.

A Basic Study on the Accident Prevention Measures of Maritime Pilots during Embarkation and Disembarkation (도선사 승·하선 사고예방 방안에 관한 기초연구)

  • LEE, Jin-Woo;KIM, E-Wan;LEE, Chang-Hee
    • Journal of Fisheries and Marine Sciences Education
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    • v.29 no.1
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    • pp.137-147
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    • 2017
  • An accident during pilotage may cause several problems such as crippling the harbour function, environmental disruption, loss of life. Since the pilot plays an important role in the safe operation of the port, securing their safety is directly connected to the vessel's safety coming into port in Korea. Pilotage service is offered on request without distinction of day and night. And traveling by helicopter and boarding/disembarking using a pilot ladder from and to a pilot boat have a high risk of falling into the sea. So, pilots can fall into the sea while boarding/disembarking from ship which can lead to serious injury by cardiac arrest. A number of pilots have died or severely injured due to fall from the pilot ladder during embarkation and disembarkation up to now. Current safety measures at embarkation and disembarkation required by pilotage act and IMO resolutions could not prevent all the pilot related accidents. Therefore, to prevent pilot accident during boarding/disembarking from ship, it is necessary to include safety training requirement for new pilots under the requirements for licensing of pilotage act. It is also necessary to compel pilots to take necessary personal protective equipment when they use a pilot ladder. In addition, the placement of emergency kit on pilot boats and first-aid training are required in order to deal with emergency situation promptly.

The Effect on Safety Perception with Ultra Light UAV Pilot's Educational Environment Satisfaction : Including the DREEM Model (초경량 무인비행장치 조종자의 교육환경 만족도가 안전의식에 미치는 영향 : DREEM 모형을 포함하여)

  • Jung, Hyung-hoon;Kim, Kee-woong;Choi, Youn-chul
    • Journal of Advanced Navigation Technology
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    • v.23 no.2
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    • pp.114-124
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    • 2019
  • The drone market, an unmanned aerial vehicle, is rapidly expanding and developing into an important area related to the huge changes in the traffic system of the future. With various technologies on the fourth industrial revolution, including drones, mentioned at the Davos Forum in January 2016, interest in drones is emerging as an explosive demand for national certificates. The number of drone pilots, which was only 400 in 2015, is continuing to surpass 17,000 as of 2018. Therefore, this study analyzed the safety perception of the pilots based on the DREEM (Dundee ready environmental assessment) model designed to evaluate the educational environment along with the current state of drone education in Korea. This led to the conclusion that the high level of satisfaction of the pilot with the educational environment contributes to the overall safety perception, including compliance with procedures.