• 디지털융복합연구
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• 제18권12호
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• pp.87-95
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• 2020

인천공항은 대한민국으로 들어오거나 나가는 관문으로 나라의 이미지에 큰 영향을 미치므로 공항의 서비스 질을 유지하기 위해선 장기적인 공항 이용객 수 예측이 필요하다. 본 연구에서는 인천공항의 이용객 수요를 예측하기 위한 다양한 시계열 모형의 예측성능을 비교하였다. 인천공항 이용객 자료를 2002년 1월부터 2019년 12월까지 월 단위로 수집하여 살펴보면 일반적인 시계열자료에서 보이는 추세성과 계절성을 지니고 있다. 본 연구에서는 추세성과 계절성이 고려된 나이브 기법, 분해법, 지수 평활법, SARIMA, 그리고 PROPHET을 이용하여 단기, 중기, 장기예측 시계열모형을 비교하였다. 분석결과 단기예측은 최근 자료에 가중치를 준 지수 평활법이 우수했고 예상 2020년 연간 이용객 수는 약 7,350만명이다. 3년 후 인 2022년 중기예측은 정상성이 고려된 SARIMA모형이 우수하였고 예상 연간 이용객 수는 약 7,980만명이다. 4단계 인천공항 건설사업이 완료되는 2024년 예상 연간 여객수용 인원은 9,910만명이고 PROPHET모형이 가장 우수하였다.

• 한국항공운항학회지
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• 제30권1호
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• pp.1-11
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• 2022

The capacity of Jeju International Airport has reached its limit due to a surge in air traffic demand such as passengers and cargo and the continuous expansion of Low Cost Carriers (LCC). Despite COVID-19 that has began in November 2019, Jeju International Airport still has continuous demand in terms of passenger and cargo transportation. As a result, it is undeniable that the delay rate also unexpectedly increased as the air traffic volume at Jeju International Airport continued to increase. In this study, the correlation between Turnaround Time and delay rates of national airlines is analyzed based on past flight data at Jeju International Airport, and the cumulative delay time trend for sampled airlines is compared with Turnaround Time. Through this study, it is expected to contribute to securing aircraft operation efficiency and on-time by analyzing delays related to Turnaround Time at Jeju International Airport.

• 한국항공운항학회지
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• 제16권4호
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• pp.54-62
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• 2008

International organizations related to air transport such as ICAO, IATA, ACI are forecasting that the number of passenger will grow about 4.4% annually up to 2015. Therefore, the innovation of given system technology and operation procedure is required in global scale to cope with the increase of air traffic demand. CNS/ATM infrastructure based on satellite is considered to play key role in order to solve the problems due to the dramatic increase of air traffic demand over the world. Free flight concept in the air transport operation has been proved with CNS/ATM infrastructure especially in USA and Europe. Therefore, it is necessary to develop key technologies to overcome technology gap and to secure international competitiveness in Korea. ADS-B is an important issue, and new element technologies should be considered as essential items which were shown in Capstone project. Nowadays, the free flight concept is combined to Air Transport Road Map such as NextGen project in USA, SESAR in Europe. In this process, free flight is included in the concepts such as ATM(Air Traffic Management), aviation security and safety, environmental protection and economy development, wide area weather variable reduction service, information integration and application between the related authorities (civil/military) etc. The purpose of research is to establish mid-term and long-term infrastructure plan and strategy for free flight realization in Korea. The analysis of action target and equipment construction status, phase construction plan of infrastructure has been performed by considering mid-term and long-term free flight plans of USA and Europe.

• 한국항공운항학회지
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• 제22권3호
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• pp.1-7
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• 2014

The base of leisure air activities are consistently expanding and its demand is expected to increase attributed to GDP growth and people's interest in its activity. Utilizing Visual Flight Rule, light sport aircrafts and ultra-light aircrafts are not under the effect of air traffic control center, which resulted in passenger injury due to emergency landing for adverse weather conditions and technical issues after pulling into mountain area, ocean and even urban area. Such events encouraged safety consciousness toward leisure aircraft activities and developing a measure to prevent a recurrence of the accident. This research focuses on suggesting compositive system for preventive safety management system by providing user based Flight information service and operating effective system, necessary for leisure aircraft activities.

• 한국항공운항학회지
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• 제20권1호
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• pp.26-33
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• 2012

Competition between air transportation and railways has grown fiercer in major countries around the world with the rise of high-speed railways. In South Korea, air passenger travel has been rapidly decreasing since the initial launch of the Seoul-Pusan KTX line in 2004 and second opening that followed in 2010. Further expansion of the high-speed railway is expected. At present, research efforts to verify the validity of constructing an underwater express railway tunnel between Ho-nam and Jeju Island are taking place. Considering the possible high speed railway connection between Seoul and Jeju Island, this thesis has analyzed the choice behavior of existing passengers of the major and low-cost carriers. For this, Stated Preference (SP) research has been performed for three variables, including fare, travel time and the number of runs, to estimate the substitution rate of each of the three variables. Binomial Logit Model has been estimated with the obtained data. The estimation of the model has found that airline passengers of major and low-cost carriers are willing to pay approximately 7,200 KRW and 5,000 KRW, respectively, to reduce travel time by one hour. If the number of runs in one day increases, it has been estimated that the passengers are willing to pay additional fares of about 390 KRW and 30 KRW, respectively. On the other hand, the substitution rate between the number of runs and the travel time was found to be somewhat insignificant. If the construction of the Seoul-Jeju line progresses in the future, this study could be used as preliminary data for determining fares, travel time and the number of runs.

• 한국항공운항학회지
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• 제22권4호
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• pp.15-24
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• 2014

Low Cost Carrier(LCC)s in Asia Pacific market are expected to record high growth due to the expansion of Open Sky Policy among Korea, Japan, China and South East Asia. As everybody is aware of, LCC is not only saving flight cost but also creates differentiating business model by reducing unnecessary services such as F&B and in-flight duty free sales services. Booming LCCs in Asian market will cause not only Incheon airport but also other local airports in Korea to compete heavily to attract LCCs. For example, Air Asia Group with more than 200 fleet has expanded its alliance network throughout Asia. Therefore this paper has researched a new business model operating a LCC terminal for the hub airport competitiveness. According to analysis result of case study, it was found out, considering increasing airline demand next decade, Incheon airport and other domestic airports in Korea had better change an existing terminal into a LCC Terminal(LCCT) to differentiate airport services and expand its hub network. That is because of economic feasibility, first of all, of securing hub and spoke networking capabilities with airlines and finally of developing commercial facilities customizing LCC passengers' demand.

• 항공우주산업기술동향
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• 제8권1호
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• pp.12-22
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• 2010

금융위기로 불거진 불경기와 불확실성에서 기인한 국제 유가의 변동은 세계 항공기 시장에도 심각한 영향을 끼쳤다. 항공 수요의 급감과 운영비용의 증가를 가져왔으며, 이에 따라 항공기 수요의 특성과 양에 있어서도 변화가 발생하였다. 2000년대 중반의 경기 회복기조 속에서 항공기 주문과 인도가 급증하였으나, 2009년에는 주문량이 급감하였으며, 신형 항공기의 인도와 항공수요 급감에 따라 중고항공기 및 임대 시장 그리고 MRO 시장도 축소되었다. 이렇게 위축된 항공기 수요는 2009년 하반기 세계 항공물류 및 승객 수송의 회복으로 다시 반등을 보이고 있으며, 향후 수요는 단일 통로기가 광동체기의 수요를 인도할 것으로 보인다. 현재, 시장의 반등이 단기적으로 끝날지 지속적으로 이어질 지에 대해서 확답을 내릴 수는 없으나, 장기적으로는 지속적인 항공기 수요의 증가가 이어질 것으로 예상되며, 이러한 수요는 아시아, 아프리카 등의 신흥시장의 성장에 힘입을 것으로 기대된다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1397-1404
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• 2011

Metro serves more than a basic function of transporting passengers between short distances but became a crucial part of civic culture due to the fact that citizens demand various facilities for better life style. Therefore, domestic metro cuts off train noise and air dust, provides pleasant platform surroundings by offering effective HVAC, and establishes PSD (Platform Screen Door) system to prevent falls into train tracks. To control and interlock EMU Door and PSD to avoid passenger complaint and revenue service obstructions, stability and reliability of on-board & wayside equipment are required foremost and each line needs to build optimum interface between on-board & wayside equipment. To control PSD, we would like to introduce examples of Busan Metro(BTC : Busan Transportation Corporation) which already utilizes interface between on-board & wayside equipment in various ways and consider optimum interface between on-board & wayside equipment in future PSD system.

• 한국정밀공학회지
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• 제19권11호
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• pp.129-136
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• 2002

Electric vehicle body has to be subjected to uniform load and demand auxiliary equipment such as air pipe, electric wire pipe and gas pipe. Especially, lightweight vehicle body is salutary to save operating costs and fuel consumption. Cross beam supports the weight of passenger and electrical equipments and account for the most of weight of vehicle body. Therefore this study performs the size and the shape optimization of crossbeam for electric vehicle using GENESIS 7.0 and presents the effect of mass reduction and the shape of hole in cross beam.

• 항공우주시스템공학회지
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• 제2권2호
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• pp.46-50
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• 2008

Aerodynamic characteristics, such as drag and lift, play an important role in automobile design under certain speed conditions. Such characteristics are essential to design an automobile since they are directly related to automobile's performance such as passenger safety and fuel consumption. There is a huge demand for the automobile to have safe performance at high speed. Reduction in drag is also important and it could lead to the solution of air flow induced noise and dust problems. The objective of this research is to find out the aerodynamic differences between conventional side mirror and a modified one using CFD. Although drag generated around a side mirror is only about 7% of the total drag when a car runs, it is very closely related to driver's field of vision and noise generation. CFD simulation of the flowfield around a car side-view mirror was performed using a commercial code; Gambit and FLUENT.