• Title/Summary/Keyword: Aircraft Selection

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Development of the Aircraft Materials Selector Expert System

  • Lim, Kang-Hee;Guan, Zhi-Dong
    • Proceedings of the Korea Inteligent Information System Society Conference
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    • 2005.05a
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    • pp.302-305
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    • 2005
  • To comply to demand for a development requirement of aircraft design part, the expert system builds up standard knowledge-base based on presently maintained expert knowledge and experience in aircraft structure material selection. It also builds up database based on aircraft design open data, and standard calculation module used for present design and analysis method. This system is developed using Visual Basic language. The expert system standardize aircraft structure material selection and can be applied to all type of elementary stage of aircraft structure design. It is working on Windows, which has a friendly interface and is convenient for debugging, maintenance and transplanting. Explanation of the structure and the function of the system was given in this paper.

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An Optimal Solution Algorithm for Capacity Allocation Problem of Airport Arrival-Departure

  • Lee, Sang-Un
    • Journal of the Korea Society of Computer and Information
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    • v.20 no.10
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    • pp.77-83
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    • 2015
  • This paper suggests heuristic algorithm to obtain optimal solution of minimum number of delay aircraft in airport arrivals/departures problem. This problem can be solved only mathematical optimization method. The proposed algorithm selects the minimum delays capacity in various airport capacities for number of arrivals/departures aircraft in $i^{th}$ time interval (15 minutes). In details, we apply median selection method and left-right selection method. This algorithm can be get the optimal solution of minimum number of delay aircraft for sixes actual experimental data.

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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ACN Estimation for Medium-class Aircraft (중형수송기 Aircraft Classification Number 예측)

  • Chung, Jin-Deog;Bae, Joong-Won;Lee, Hae-Chang
    • Journal of Aerospace System Engineering
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    • v.4 no.3
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    • pp.34-38
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    • 2010
  • ACN(Aircraft Classification Number) is allocated by marketing group during early stage of aircraft design phase and is a critical parameter to decide whether the designed aircraft can be landed or not in a certain airport. The loading on the main landing gear wheels, selection of main landing gear tire and estimation of ACNs for flexible and rigid pavements were done for the proposed medium-class aircraft. The estimated ACN values are compared with the similar class aircraft. And PCN(Pavement Classification Number) values of airport in Korea are surmmarized. Results showed that the currently proposed medium-class aircraft can land any airport in Korea.

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The Study of Optimal Performance Improvement Method for Aircraft of Various Variants within the Same Type (다양한 형상의 동일 기종 항공기에 대한 성능개량 최적 구현 방안 연구)

  • Kim, Youngil;Ahn, Seungbeom;Choi, Myeongseok
    • Journal of the Korea Institute of Military Science and Technology
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    • v.25 no.3
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    • pp.311-320
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    • 2022
  • In this paper, we studied the optimal method of improving performance for aircraft having various variants within the same type. The study defined configuration of an entire fleet of aircraft being subject to a performance improvement program. And selected the most complicated aircraft configuration among them as a Standard Aircraft for modification by according to the proposed Aircraft Selection Process for developing an optimal Aircraft Performance Improvement Process. Based on the selected the Standard Aircraft, drew a system integration design result and carried out Evaluation Test and obtained Airworthiness Certification. Created the database with the design data of the Standard Aircraft, Evaluation Test, and Airworthiness Certification results, and applied it to variants of aircraft to complete the performance improvement program with optimized schedules and costs. By applying the proposed method to IFF performance improvement program, drew optimal system integration design and completed the program with minimized schedule.

Aluminium Based Brazing Fillers for High Temperature Electronic Packaging Applications

  • Sharma, Ashutosh;Jung, Jae-Pil
    • Journal of the Microelectronics and Packaging Society
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    • v.22 no.4
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    • pp.1-5
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    • 2015
  • In high temperature aircraft electronics, aluminium based brazing filler is the prime choice today. Aluminium and its alloys have compatible properties like weight minimization, thermal conductivity, heat dissipation, high temperature precipitation hardening etc. suitable for the aerospace industry. However, the selection of brazing filler for high temperature electronics requires high temperature joint strength properties which is crucial for the aerospace. Thus the selection of proper brazing alloy material, the composition and brazing method play an important role in deciding the final reliability of aircraft electronic components. The composition of these aluminium alloys dependent on the addition of the various elements in the aluminium matrix. The complex shapes of aluminium structures like enclosures, heat dissipaters, chassis for electronic circuitry, in avionics are designed from numerous individual components and joined thereafter. In various aircraft applications, the poor strength caused by the casting and shrinkage defects is undesirable. In this report the effect of various additional elements on Al based alloys and brazing fillers have been discussed.

An Weather Analysis for Selection of the Aircraft Category F's Alternative Airport (F급 항공기 교체공항 선정을 위한 기상분석)

  • Kim, Y.C.;Kim, Dohyun
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.20 no.4
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    • pp.70-75
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    • 2012
  • This paper is part of the research about the selection and justification of Jeju international airport as an aircraft category 'F' alternative airport, which is the results of an weather analysis based on meteorological statistics. As the results of the study, it has been only 1 day per year (58minutes) that weather conditions of Incheon and Jeju international airports, from January 2006 to June 2011, are below landing weather minimums of each airport at the same times. This means that these airports are not within the same meteorological region, which is against the current orthodoxy. In addition, it is very rare that weather conditions of Jeju international airports are below landing weather minimums when Incheon international airport is below landing weather minima. It shows that the meteorological characteristics of these regions differ widely and the designation of Jeju international airport as an alternative airport is scientifically reasonable.

How to Use an Optimization-Based Method Capable of Balancing Safety, Reliability, and Weight in an Aircraft Design Process

  • Johansson, Cristina;Derelov, Micael;Olvander, Johan
    • Nuclear Engineering and Technology
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    • v.49 no.2
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    • pp.404-410
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    • 2017
  • In order to help decision-makers in the early design phase to improve and make more cost-efficient system safety and reliability baselines of aircraft design concepts, a method (Multi-objective Optimization for Safety and Reliability Trade-off) that is able to handle trade-offs such as system safety, system reliability, and other characteristics, for instance weight and cost, is used. Multi-objective Optimization for Safety and Reliability Trade-off has been developed and implemented at SAAB Aeronautics. The aim of this paper is to demonstrate how the implemented method might work to aid the selection of optimal design alternatives. The method is a three-step method: step 1 involves the modelling of each considered target, step 2 is optimization, and step 3 is the visualization and selection of results (results processing). The analysis is performed within Architecture Design and Preliminary Design steps, according to the company's Product Development Process. The lessons learned regarding the use of the implemented trade-off method in the three cases are presented. The results are a handful of solutions, a basis to aid in the selection of a design alternative. While the implementation of the trade-off method is performed for companies, there is nothing to prevent adapting this method, with minimal modifications, for use in other industrial applications.

Considering the Multi-Purpose Display Designed for Aircraft Lightning Protection (낙뢰보호를 고려한 항공기용 다목적 디스플레이 설계)

  • Cheon, Young-Ho;Lee, Seoung-Pil;Park, Jun-Hyeon
    • Journal of Advanced Navigation Technology
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    • v.18 no.5
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    • pp.445-454
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    • 2014
  • In this paper, we introduce measures designed content for RTCA DO-160 F, Section 22 tests performed to verify the effects of indirect lightning and testing process of the test was carried out in the multi-purpose display certification process. This is referred to as indirect effects of lightning capability of an aircraft having electrical electronic equipment failure or damage to bring lightning induced voltages. In order to protect the avionics from lightning indirect effects of these aircraft are analyzing the effects of lightning strikes on aircraft and aircraft systems and interior design needs protection against the threat on their part. In this paper, we introduce RTCA DO-160 F, component selection process according to Section 22 category selection method and the selected level for determining the level of such measures for protection against lightning of multipurpose display for this aircraft. It also introduces the actual test process to confirm that the designed effectiveness of the selected part. We expect a good example of the lightning planned for future development of measures designed avionics through each step of the process introduced this.

Aircraft configuration selection method using the airworthiness certification and the decision making process (항공안전 규정 및 의사결정모델을 이용한 항공기 형상선정기법 연구)

  • Yoon, Jung-Won;Bae, Bo-Young;Lee, Jae-Woo;Byun, Yung-Hwan
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.5
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    • pp.467-476
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    • 2010
  • For the very light jet aircraft design, the design baseline configuration has been selected using the logical decision making process, and the design optimization problem is formulated by considering the airworthiness regulations as design constraints. Airworthiness regulations are the minimum requirements for the safe aircraft flight and must be considered from the conceptual design stage. After carefully selecting the airworthiness constraints and the user specified requirements, a series of design making models including the affinity diagram, nested column diagram, quality function deployment (QFD), Pugh concept selection matrix, are used to find and evaluate alternative configuration baselines. From the feasible design space searching process, the best altenative design, which satisfies the airworthiness constraints while excluding the user subjective decisions as much as possible, has been successfully derived.