• Title/Summary/Keyword: 항공교통 혼잡도

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A Study on Priority Allocation Algorithm According to Air Traffic in Aeronautical Communication Environment (항공이동통신환경에서 항공교통량에 따른 우선순위 할당 알고리즘에 관한 연구)

  • Jo, Yun-Hyun;Kim, Yong-Kyun;Kim, Sang-Uk;Park, Hyo-Dal
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.9 no.1
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    • pp.91-100
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    • 2010
  • According to the recent increase in air traffic a more efficient air traffic flow control is required. This paper proposes the algorithm for efficient air traffic flow control. Aeronautical communication environment is different from the common communication environment since it needs a direct communication between stations (or airplanes) and requires a strict priority for safety message. Moreover, the wide area for basic service causes high propagation delay. In this paper, by using existing CSMA/CA Media Access Control (MAC) protocol, we set the message priorities according to air traffic condition (congestion airport area, approach control area, En route area, and ocean area). This prioritization scheme enables the data transmission with higher access probability. Simulation results confirm that our protocol shows better performance in terms of channel efficiency and success probability compared to exisiting CSMA/CA protocol.

Selection of Vertiport Location, Route Setting and Operating Time Analysis of Urban Air Mobility in Metropolitan Area (수도권 도심항공 모빌리티 수직이착륙장 위치 선정, 경로 설정 및 운행 소요시간 분석)

  • Oh, Jae-Seok;Hwang, Ho-Yon
    • Journal of Advanced Navigation Technology
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    • v.24 no.5
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    • pp.358-367
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    • 2020
  • With the increases of average commuting time of office workers in the Seoul metropolitan area and the cost of traffic congestion on roads, the need for new transportation is increasing and urban air mobility (UAM) is emerging as an alternative. Therefore, in this paper, the vertiport locations were selected and routes were established using population, traffic and commuting data of Seoul and Gyeonggi Province. Vector thrust type and multicopter type of eVTOL compatible for UAM were selected by analyzing the types of eVTOLand time required for selected routes was calculated. In addition, the time required when we utilize other transportations was compared with UAM. Finally, it was verified that the commuting time can be sharply reduced when we use UAM.

Policy Study on Efficient Aeronautical Frequency Band Allotment and Management in the Congested Air Traffic Environments (효율적인 항공 주파수 대역 분배와 관리 정책 연구)

  • Kwag, Young-Kil;Lee, Kang-Woong
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.8
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    • pp.878-887
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    • 2012
  • Aeronautical frequency band is to be internationally protected for aviation safety. Recently, with a rapid growth of an international air traffic, aeronautical frequency band is getting saturated, and thus may causes the interference in the congested frequency band. In this paper, an efficient aeronautical frequency allotment and management policies are proposed for resolving the existing problems in the aeronautical frequency band. The key activities include the review of the aeronautical frequency management and interference mitigation policies in a few important foreign countries such as United States and Japan. This policy study will be contributed for the future air safety in the aeronautical frequency management point of view.

Modeling the Aviation Safety Risk Management (항공안전 위기관리 모형 구축에 관한 연구)

  • Hong, Seok-Jin;Kim, Yeon-Myeong
    • Journal of Korean Society of Transportation
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    • v.24 no.1 s.87
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    • pp.19-28
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    • 2006
  • To develop a crisis management for aviation safety, this study has defined crisis management includes risk management which is eliminates or lowers risks prior to accidents and emergency response after the accidents. This study takes a look at different kinds of crisis managements, risk managements and statistical methods of other nations and fields in order to develop a risk management model. Through surveys which have 102 risk factors that include air traffic control, maintenance and airport sectors, the weight of each risk factor was calculated and the probability was divided to develop a model for risk management. The risk management model of this study is conducted using four steps (risk management plan, risk factor identification, weight and probability analysis, decision making) and 4 standards of weight along with 5 standards of probability This study takes a look at Predictions through a quantitative method using a risk index for the risk management model An effective risk management model should have a wide and continuous collection of data and adopt various methods using this model. The crisis management could not be very effective only using a pre-active risk management. So it should also be conducted by using a pro-active response system to protect additional damage and to prevent accidents of the same nature. From the results, the most important points were the establishment of command and control accountabilities, and cooperation of related organizations.

A Study on the Establishment of Education and Training Program for Urban Air Mobility(UAM) Pilot in Korea (국내 도심항공모빌리티(UAM) 조종사 교육·훈련제도 수립 방안 연구)

  • Young-jin Cho;Chul Park;Se-Hoon Yim
    • Journal of Advanced Navigation Technology
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    • v.27 no.4
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    • pp.330-336
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    • 2023
  • Rapid urbanization is rapidly progressing around the world, and urban problems such as traffic congestion, environmental pollution, and noise pollution are emerging, due to this urban concentration phenomenon, logistics and transportation costs are increasing. Urban Air Mobility(UAM) is a three-dimensional futuristic urban transportation that is expected to become an important transportation axis of smart cities as a service(MaaS) linked to roads, railways, and personal transportation. However, as of July 2023, research on airspace systems, Bertieport design, navigation, and communication for UAM operation is actively being conducted, but little research has been conducted on the concept of pilot education and training and education and training programs. Therefore, this paper aims to present a suitable plan for the domestic pilot training system through SWOT analysis of vertical takeoff and landing(VTOL) pilot education and training programs in the United States and Europe.

Analysis of Breakdown Characteristics by Lane Interaction at Freeway Merging Area with a View of Time and Space (차로별 교통류 상호영향에 따른 고속도로 합류부 교통와해 특성 분석에 관한 연구)

  • Kim, Sang-Gu;Kim, Yeong-Chun
    • Journal of Korean Society of Transportation
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    • v.25 no.2 s.95
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    • pp.73-81
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    • 2007
  • The purpose of this paper is to perform a basic study on the interaction between lanes, which can be achieved through analyzing traffic breakdown at the microscopic level. Using aerial photographic data for the microscopic analysis, this study analyzed the characteristics of traffic flow at a merging area. This research produced aggregated traffic data such as flows, speeds, and densities in 30 second intervals by lane for the macroscopic analysis and individual headway data by lane for the microscopic analysis. The paper contains an analysis of lane characteristics through flows, speeds, densities, and headway variations and also investigates the influence of ramp flows on mainline flows with space-time diagrams. Firstly, the merging area in this study is divided into three sections: before-merging, during-merging, and after-merging. The transition process was analyzed at each lane. Secondly, the breakdown was observed in detail with data divided in 50-foot units. The breakdown was checked through the relationships between ramp and freeway mainline flows, various techniques were proposed to analyze the breakdown, and the formation of breakdown was introduced as three stages in this study. In the near future, the findings of this study could contribute to determining the dynamic capacity on freeways by easily understanding changeable traffic breakdown patterns over time and space.

Condition Analysis of Breakdown Occurrence at Freeway Weaving Section (고속도로 엇갈림구간 교통와해 발생 여건 분석)

  • Kim, Sang-Gu;Kim, Young-Chun
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.6 no.3
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    • pp.57-66
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    • 2007
  • Weaving is defined as the crossing of two or more traffic streams traveling in the same general direction along a significant length of highway without the aid of traffic control devices. Compared with other freeway sections, perturbation is easy to happen at weaving section. Because there are a lot of lane-changing maneuvers at the weaving section, traffic is subject to turbulence in excess of that normally presents on freeway basic section. This turbulence causes operational problems and its impact must be considered. The purpose of this paper is to perform a basic study on flow characteristics by lane, which can be achieved through analyzing breakdown phenomenon in the microscopic approach. The study made use of data derived from the aerial photography for the microscopic analysis. This research produced the 30-second interval data such as flows, speeds, and densities for the macroscopic analysis and derived the vehicular data to draw time-space diagram for the microscopic analysis. The paper analyzed the traffic characteristics using flows, speeds and densities variation and investigated the conditions of breakdown occurrence with the time-space diagrams. The breakdown phenomenon was identified at weaving section and the propagation from free flow to synchronized flow was observed in this study. In the future, the findings help develop the traffic operational algorithm to manage the traffic congestion under ubiquitous circumstance since the conditions of breakdown Phenomenon can be understood more.

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Aeroacoustic Analysis of UAM Aircraft in Ground Effect for Take-off/Landing on Vertiport (버티포트 이착륙을 고려한 지면 효과를 받는 UAM 항공기에 대한 공력소음 해석 연구)

  • Jin-Yong Yang;Hyeok-Jin Lee;Min-Je Kang;Eunmin Kim;Rho-Shin Myong;Hakjin Lee
    • Journal of Aerospace System Engineering
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    • v.17 no.2
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    • pp.26-37
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    • 2023
  • Urban air mobility (UAM) is being developed as part of the next-generation aircraft, which could be a viable solution to entrenched problems of urban traffic congestion and environmental pollution. A new airport platform called vertiport as a space where UAM can take off and land vertically is also being introduced. Noise regulations for UAM will be strict due to its operation in a highly populated urban area. Ground effects caused by vertiport can directly affect aerodynamic forces and noise characteristics of UAM. In this study, ground effects of vertiport on aerodynamic loads, vorticity field, and far-field noise were analyzed using Lattice-Boltzmann Method (LBM) simulation and Ffowcs Williams and Hawkings (FW-H) acoustic analogy with a permeable surface method.

Noise Analysis for the Operation of the eVTOL PAV using AEDT (Aviation Environmental Design Tool) (AEDT(Aviation Environmental Design Tool)를 이용한 전기추진 수직이착륙형 PAV 운영을 위한 소음 분석)

  • Yun, Ju-Yeol;Lee, Bong-Sul;Hwang, Ho-Yon
    • Journal of Advanced Navigation Technology
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    • v.23 no.4
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    • pp.265-272
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    • 2019
  • In this paper, we selected commuting scenarios in the most congested metropolitan area in Korea, and conducted noise analysis during personal air vehicle (PAV) operation using aviation environmental design tool (AEDT)software which was developed by Federal Aviation Administration (FAA). Noise is the second important factor after safety in order to operate PAVs through concepts such as ODM (on-demand mobility) introduced by National Aeronautics and Space Administration (NASA). Noise analysis were performed by modeling low-noise ePAVs as commercial helicopters and predicted residential suitability in order to resolve problems in which accurate NPD (noise power distance) data from PAVs were not released. The application of noise reduction technology such as electric propulsion has significantly reduced noise exposure levels and has reached the conclusion that commuting with PAVs is feasible without noise problems in the metropolitan area.

Data Association and Its Applications to Intelligent Systems: A Review (데이터 연관 문제와 지능시스템에서의 응용: 리뷰)

  • Oh, Song-Hwai
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.49 no.3
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    • pp.1-11
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    • 2012
  • Data association plays an important role in intelligent systems. This paper presents the Bayesian formulation of data association and its applications to intelligent systems. We first describe the Bayesian formulation of data association developed for solving multi-target tracking problems in a cluttered environment. Then we review applications of data association in intelligent systems, including surveillance using wireless sensor networks, identity management for air traffic control, camera network localization, and multi-sensor fusion.