• Title/Summary/Keyword: Aircraft

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Positional Stability Analysis of Trailing Aircraft in Formation Flight (편대비행에서 후방 항공기의 위치 안전성 분석)

  • Cho, Hwan Kee
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.24 no.2
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    • pp.19-24
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    • 2016
  • Positional stability analysis based on aerodynamic forces and induced moments of formation flight using two small aircraft models is presented. The aerodynamic force and moments of the trailing aircraft are analyzed in the aspect of flight stability. The induced moments with the change of local flow direction by wing-tip vortex from the leading aircraft can affect the flight positional stability of aircraft in closed formation flight. Aerodynamic forces and moments of trailing aircraft model are measured by 6-component internal balance at the 49 locations with vertical and lateral space between two aircraft models. Results are shown that the positional stability of trailing aircraft in formation flight can be analyzed by positional stability derivatives with vertical and lateral space. It is concluded that flying positions can be important factors for aircraft position stability due to induced aerodynamic force and moments with vertical and lateral spacing by the variation of flow pattern from the leading aircraft in formation flight.

A Study on Outworn Aircraft Management Scheme Using Market Basket Analysis (장바구니 분석을 이용한 노후 항공기 관리방안 연구)

  • Jung, Chi-Young;Lee, Jae-Young
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.1
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    • pp.77-83
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    • 2010
  • In this paper, we proposed new outworn aircraft management procedure. ROKAF has both good management skill and information system, AMMIS, regarding aircraft maintenance based on all kinds of aircraft's defects. To optimize and secure aircraft's operation, management of the outworn aircraft is very important for ROKAF. With respect to these outworn aircraft's defects and maintenance, we analyzed defects occurrence pattern of outworn aircraft by using AMMIS data and Market Basket Analysis, and found the specified association rules for each defect. By using these association rules, we developed new management procedure for outworn aircraft based on the results of affinity analysis. The management procedure in this paper will also be used to optimal operation and maintenance of other aircraft and weapon systems.

A Study on Improving Aircraft Maintenance Licensing System of South Korea for Mutual Recognition Between Countries

  • Oh, Kwon-suk;Lee, Hakbong;Yoo, Kwang-Eui
    • Journal of Aerospace System Engineering
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    • v.14 no.6
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    • pp.36-43
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    • 2020
  • The purpose of this study is to present the internationalization of South Korea's aircraft maintenance certificate for mutual recognition of aircraft maintenance license qualifications among various countries in preparation for an internationalization of the work conducted by the aviation industry. To achieve this objective, this study reviews the aircraft maintenance license training system and compares the standards for aircraft maintenance certification established by the Convention on International Civil Aviation with the standards for issuing domestic aircraft maintenance licenses. This comparative analysis shows that the domestic curriculum of aircraft maintenance licenses differs from international standards. As a result of this study, an improvement plan of the education content was proposed to enable the licensing qualifications of domestic aircraft maintenance licenses to be mutually recognized among different countries.

The Study of Aircraft Carrier Sortie Generation System(CVSGS) Boundary Analysis (항모쏘티생성시스템(CVSGS) 경계분석에 관한 연구)

  • Lee, Seung Do;Park, Peom
    • Journal of the Korean Society of Systems Engineering
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    • v.11 no.1
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    • pp.73-79
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    • 2015
  • This paper describes boundary analysis for modeling Aircraft Carrier Sortie Generation System(CVSGS). An aircraft carrier, as a super system, is a warship going into battle by operating a number of aircraft on deck and it should be lay down a definition about aviation operations interacting between aircraft carrier and carrier air wing in small deck area. For this reason this paper models common aviation support system for generating sortie basic unit of carrier aviation operations unlike to general warship and defines boundaries between this system and aircraft carrier and carrier air wing. This paper analysis activities of aircraft carrier and embarked carrier air wing in carrier aviation operations, and analysis and defines boundaries Aircraft Carrier Sortie Generation System(CVSGS) to perform core functions in interacting between aircraft carrier and embarked carrier air wing.

A Study on the Evaluation Metric of a Civil Aircraft Noise (민간항공기 소음평가 단위에 관한 연구)

  • Lee, Jun-Ho
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.16 no.5
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    • pp.503-513
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    • 2006
  • The duration time of aircraft noise event is also an important factor for the evaluation of civil aircraft noise, which is considered as a notable characteristic of military aircraft noise. SEL is proved as a suitable noise metric for the measuring military aircraft noise of various flight pattern considering the duration time of noise event. This study reviews whether SEL is a suitable for measuring civil aircraft noise and study shows SEL is fairly compensating the duration time of civil aircraft noise event for the evaluation of aircraft noise. Noise metric for the evaluation aircraft noise based on SEL is more appropriate than based on $L_{MAX}$ for compensating duration time of noise event either military aircraft or civil aircraft. In this reason, current formula of WECPNL based on energy average of measured $L_{MAX}$ for the evaluation of aircraft noise impact in 'Test Method of Noise and Vibration of Korea' is recommended to be amended to formula of WECPNL based on energy average of measured SEL considering compensation of noise event duration time, if WECPNL is not based on measured EPNL, a metric compensating duration time.

A Study on the System Engineering Application to KC-100 Aircraft Development (민간항공기개발 시스템엔지니어링 적용 연구)

  • Choi, Nag-Sun;Kang, Min-Seong;Kim, Kwang-Hae;Koh, Dae-Woo
    • Journal of the Korean Society of Systems Engineering
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    • v.5 no.2
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    • pp.49-56
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    • 2009
  • KC-100(KAI Civil Aircraft, Small Series) aircraft is 4 seats general aviation aircraft with single piston engine which is developing under FAA part 23 category by Korea Aerospace Industries(KAI) and will be a shadow program for civil aircraft safety infrastructure improvement. This aircraft will be the first civil aircraft developed in Korea meeting the Korean regulatory KAS Part 23 requirements. Type certification for KC-100 aircraft was applied at the second half of this year. The type certificate is expected to be issued after 3 years of design, prototype manufacturing, ground and flight tests. In this paper the system engineering process for civil aircraft was first reviewed. Next, the differences and similarities in the system development between military and civil aircraft were systematically examined using experiences for KAI military aircraft development program.

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A Study of Optimal Aircraft Allocation Model for Attacking Fixed Target (고정목표 공격을 위한 최적 항공기 할당모형에 관한 연구)

  • Heo Jong-Jun;Kim Chung-Yeong
    • Journal of the military operations research society of Korea
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    • v.12 no.2
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    • pp.22-36
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    • 1986
  • The study is to design optimal aircraft allocation model for sufficing the required level of damage, minimizing attrition cost when the aircrafts attack the enemy's fixed target. When friendly aircraft attacks enemy target, the aircraft will suffer the loss due to the enemy's anti-aircraft weapons and aircraft. For this study, it is required that the probability of target damage by the type of aircraft, level of target damage and attrition cost are computed for the application of this model.

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A Study on the Evolutionary Process of Aircraft Production Quality Management System - Comparison of Characteristics of Domestic and Foreign Companies (항공기생산 품질경영시스템 발전 과정 연구 - 국내외 업체간 특징 비교)

  • Lee Sung Ju;Byun Jai-Hyun
    • Journal of the Korean Society for Quality Management
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    • v.32 no.3
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    • pp.166-181
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    • 2004
  • The aircraft production quality management system in Korea has been implemented to support the developmental phase of Korean aircraft industries, from overhaul of the aircraft and engines to development of military trainer aircraft. After the deletion of the Mil-Q-9858A standard in 1996, Korean aerospace companies established ISO 9001 and AS 9100 as their basic aerospace quality management system specifications. These quality standards were adopted in the same period of time by other leading international aircraft manufacturing companies. This paper presents a future direction on the improvement of quality management systems for Korean aircraft production company by considering (1) Korean governments strategy for the development of Korean aircraft Production industries, (2) short and long term business plan of Korean aerospace industries, and (3) benchmarking leading international company's quality management systems.

Study on the Specification and Operation Plan of the Meteorological Purpose Aircraft (기상 전용 항공기 도입 및 운영방안 연구)

  • Han, Kyoung-Keun;Kim, Young-Chul;Park, Soo-Bok
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.17 no.4
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    • pp.55-62
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    • 2009
  • The Prime objectives of this study are to identify and analyze possible solutions and select a solution for the specification and operation plan of the meteorological purpose aircraft in Korea. Infrastructure like meteorological purpose aircraft and aircraft operating systems should be set up and their efficient plan must be established to improve meteorological technic in Korea. As a result of the study, we have found that the turboprop engine powered aircraft is the most suitable to initial model for the meteorological purpose aircraft. It was found that the indirect operation method might be the best solution, also. The results of this study may be useful to make decision for selecting specification and operation of the meteorological purpose aircraft.

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A Study on the Test & Evaluation Process of Civil Aircraft for Compliance (적합성 입증을 위한 민항기 시험평가 절차 연구)

  • Kim, Kwang Hae;Choi, Nag Sun;Koh, Dae Woo
    • Journal of the Korean Society of Systems Engineering
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    • v.6 no.1
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    • pp.25-32
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    • 2010
  • The Test and Evaluation (T&E) process is an integral part of the Systems Engineering Process. The purpose of Test and Evaluation (T&E) in a system development is to identify the areas of risk to be reduced or eliminated. In this study, when develop aircraft of Civil Aviation with development experience of Military Aircraft, it is that establish Test and Evaluation process. Test and Evaluation for KC-100 small aircraft development can divide to certification test and development test. Certification test is proved compliance about Korea Airworthiness standard (KAS Part 23), through Development Test verify required performance of aircraft. These Test and Evaluation Process is more efficient and optimized.

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