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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society for Aviation and Aeronautics
Journal Basic Information
Journal DOI :
The Korean Society for Aviation and Aeronautics
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Volume & Issues
Volume 23, Issue 4 - Dec 2015
Volume 23, Issue 3 - Sep 2015
Volume 23, Issue 2 - Jun 2015
Volume 23, Issue 1 - Mar 2015
Selecting the target year
A Study on Flexible Culture in Aviation Maintenance Organization
Kim, Chun-Yong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 1~7
DOI : 10.12985/ksaa.2015.23.1.001
The aircraft maintenance demands a lot of aviation mechanics in urgent according to the high season and low season in seasonal demand adjusted, unplanned maintenance work such as AD (airworthiness directives) and troubleshooting of aircraft system fault. The advent of Super-Large Aircraft such as A380 with aircraft materials, power plant and avionics systems which were not in previous models must be expected to increase the complexity of the aircraft maintenance system. This study is intended to propose the development plan for formation of positive flexibility culture in aircraft maintenance organization through the review of previous research on flexibility culture of organization and through empirical research for bureaucratic and poor factors by the evaluation of flexibility culture level of domestic aircraft maintenance organization.
A Study on the Wind Estimation for Unmanned Parafoil System
Kim, Tae-Wook ; Song, Yong-Kyu ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 8~13
DOI : 10.12985/ksaa.2015.23.1.008
In this paper, a simple algorithm is proposed to estimate wind speed and direction which can significantly improve the landing performance of an unmanned parafoil. The proposed algorithm is applied to flight test data along with other known algorithms and the results are compared and discussed. The proposed algorithm shows comparable performance while it can still be applied to the parafoil under control.
Bibliometric Network Analysis on Low Cost Carrier Research
Rha, Jin-Sung ; Choi, Dong-Hyun ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 14~23
DOI : 10.12985/ksaa.2015.23.1.014
This study applied the network text analysis to reveal the scope and trends of low cost carrier studies. We analyzed low cost carrier research published in Korean journals and news articles. The results showed that there are three clusters in terms of research topics. First dimension consists of articles investigating growth in the low cost carrier industry. The second dimension is associated with service characteristics. The last dimension has strong ties organizational and human resource dimension. We run Krkwic, Krtitle, Netdraw, and Ucinet 6.0 to conduct the network text analysis. This study suggests the direction of low cost carrier research in the future.
Non-linear Structural Analysis of Main Wing Spar of High Altitude Long Endurance UAV
Park, Sang-Wook ; Shin, Jeong-Woo ; Lee, Mu-Hyoung ; Kim, Tae-Uk ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 24~29
DOI : 10.12985/ksaa.2015.23.1.024
In order to increase endurance flight efficiency of long endurance electric powered UAV, main wing of UAV should have high aspect ratio and low structural weight. Since a spar which consists of thin and slender structure for weight reduction can cause catastrophic failure during the flight, it is important to develop verification method of structural integrity of the spar with the light weight design. In this paper, process of structural analysis using non-linear finite element method was introduced for the verification of structural integrity of the spar. The static strength test of the spar was conducted to identify structural characteristic under the static load. Then, the experimental result of the spar was compared to the analytical result from the non-linear finite element analysis. It was found that the developed process of structural analysis could predict well the non-linear structural behavior of the spar under ultimate load.
A Study on the Aptitude Test of Remotely Piloted Aircraft Pilots (Focused on Selection of Aptitude Test Items)
Park, Won-Tae ; Lee, Kang-Seok ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 30~40
DOI : 10.12985/ksaa.2015.23.1.030
Recently, the need of RPA(Remotely Piloted Aircraft) pilots is increasing rapidly with many requirements in order to be a beginner RPA pilot, including basic flight training, instrument flight qualification training, and aircraft type switching training. When RPA pilot gets disqualified, there will be generated much waste of efforts and expenses of trainees those pilots who are disqualified. Therefore, the methodology of pre-verifying those pilots who are not proper as RPA pilots through various scientific methods will save time and expenses with pre-reducing the pilots who will get disqualified later on. The methodology of aptitude test of RPA pilots is laid out as a consideration of pre-study of RPA pilots work analysis, and select types of aptitude test. A suitability of aptitude test is verified. In order to diagnose the flight aptitude precisely, it requires to be developed. Flight aptitude test tools might be connected with training program which could foster piloting aptitude with pre-diagnosing RPA pilot trainee selecting process. For that reason, we made an experiment in order to verify credibility and suitability of these selected programs with developing RPA pilot aptitude test tools. And also, we analyzed relationships among characteristics, analysis of data, and variables to verify the efficiency of data from prior experiment. Through this thesis, we expect to raise efficiency of flight training by providing pre-flight aptitude test information of RPA pilots.
A Study on Simulation-based Method for Implementation of Ground Delay Program for Jeju International Airport
Lee, Young-Jong ; Cho, Ji-Eun ; Baik, Ho-Jong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 41~48
DOI : 10.12985/ksaa.2015.23.1.041
Being a cost-efficient solution for alleviating the traffic congestion in airspace, Air Traffic Flow Management (ATFM) has drawn more attentions from not only air traffic controllers but also researchers in the field of Air Traffic Management (ATM). Among other ATFM initiatives, it is believed that Ground Delay Program (GDP) could be effectively applied to reduce the congestion particularly in the relatively small airspace with dense traffic demand. This paper introduces a novel way that suggests flights to be delayed on the departing airports together with amount of the delays (in time) for those flights to be delayed. Adopting a fast-time simulation for predicting airspace delay of each flight for a given flight plan, the method is designed to iteratively and incrementally adjust the departure times in the plan towards reducing total airspace delays. Applying the method to Jeju airport with a hypothetically high demand, the paper demonstrates the airspace delay could be significantly reduced by applying GDP at Gimpo airport where more than 60% of Juju-bound flights departure. Although the simulation model needs to be calibrated and validated for the real-world application, the results clearly shows that the approach can possibly implemented as a tool for preparing the daily plan at the pre-tactical stage defined in the ICAO ATFM manual.
Dynamic Modeling and Design of Controller based on Thrusters for Korean Lunar Module
Yang, Sung-Wook ; Lee, Sang-Chul ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 49~55
DOI : 10.12985/ksaa.2015.23.1.049
This paper deals with dynamic modeling and controller design of a future Korean lunar module planned to be launched 2020`s in Korea. For dynamic modeling of the lunar module, we first assume the lunar module as a rigid body. And we derive equations of motion for the lunar module by considering allocation of main thrusters and reaction thrusters. With the equation of motion, we design the controller based on the quaternion. A Pulse Width Pulse Frequency modulator(PWPFM) is selected for generating on/off signal. Finally, we construct a 2-phase descent mode including initial guidance mode, terminal guidance mode. The MATLAB simulation is performed for evaluating the descent ability and final landing velocity. The dynamic modeling and descent simulation of the lunar module in this paper could be applied for developing the future work of the Korean lunar exploration program.
Landing Gear 2 Degree of Freedom Modeling and Optimization
Lee, Seung-Gyu ; Shin, Jeong-Woo ; Kim, Tae-Uk ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 56~61
DOI : 10.12985/ksaa.2015.23.1.056
Because of kinematic complexities, nonlinear behavior, etc, the performance of oleo-pneumatic landing gear is predicted by qualified commercial softwares. While commercial softwares predict more exactly, it takes a long time to construct or modify a model. At initial design stage, design parameters can be determined quickly and exactly enough with simple 2 degree of freedom model of mass, spring and damping. 2 degree of freedom model can be easily applied to optimization and reliability analysis which takes repetitive computation. In this paper, oleo-pneumatic landing gear is modeled as a nonlinear 2 degree of freedom model. The analysis are compared with landing gear drop test. To determine design parameter, optimization problem is solved with genetic algorithm and 2 degree of freedom model.
Development of a Testing Machine for Fretting Damage of Aerospace Components
Kwon, Hyuk-Jin ; Kim, Kyung-Mok ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 62~66
DOI : 10.12985/ksaa.2015.23.1.062
In this paper, a fretting testing machine is developed using ball-on-flat test apparatus. Precise micro-slip motion is produced by a linear stage. A relative displacement between a ball and a flat specimen is measured with a laser displacement sensor. Dry friction tests are conducted with AISI 52100 steel balls and cold-rolled high strength steel plates at room temperature and ambient humidity. The evolution of the kinetic friction coefficient is determined. Comparison between measured friction coefficients and those found in the literature is then carried out. Fretting tests with an electro-deposited coating are employed at an amplitude of 0.05 mm. Slip regime is identified with slip ratio. It is demonstrated that a developed testing machine allows determining the friction coefficient under fretting condition.
A Study on Fly-By-Wire Helicopter Control Law Design using SAS Actuators
Kim, Eung-Tai ; Choi, In-Ho ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 67~73
DOI : 10.12985/ksaa.2015.23.1.067
The previous limited authority system capable of implementing attitude command response type and translational command response type by operating SAS actuator has the problem of early saturation of SAS actuator since SAS actuator should compensate the mechanical linkage displacement caused by control sick movement. In this paper, a limited authority system where flight control computer receives the command from the control stick which is not connected to the mechanical linkage is described. In this system the compensation by the SAS actuator is not necessary and SAS actuator saturate later. SAS actuator saturation problem can be further relaxed by using the trim actuator. This new limited authority system is applied to BO-105 model, simulation is performed for the doublet input and pirouette maneuver is also simulated and analyzed.
A Study on The Competitiveness Evaluation Index Development of Global Aviation Training Organizations
Yi, Yong-Ki ; Yoo, Kwang-Eui ; Park, Sung-Sik ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 74~84
DOI : 10.12985/ksaa.2015.23.1.074
The purpose of this study is to develop competitiveness evaluation index for global aviation training organizations. Research and studies on relevant documents were conducted to establish the index. With no sufficient study results previously done directly associated with global aviation training organization, relevant and related documents, such as studies on competitiveness evaluation index of higher educational institutions, were reviewed as an alternative. Two rounds of delphi surveys were conducted based on the review and consultation from experts in aviation training and human resource management fields. First round of survey with 62 evaluation indices were carried out, through which a total of 29 were selected, and 19 indices were chosen during the second round of survey. However, factor analysis was conducted in order to justify the survey result, which eliminated 3 more indices, with 16 finally selected. This study will provide implications for aviation training organizations which need to further improve their competitiveness globally.
A Study of Assessing the Impact of Foreign Cabin Crews` Self-Leadership on Airline`s Organizational Effectiveness
Jang, Ji-Seung ; Lee, Nam-Ryung ; Lee, Geun-Young ; Kim, Ki-Woong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 85~95
DOI : 10.12985/ksaa.2015.23.1.085
A responsibility of superior management in an airline has become enormous due to rapid increase of airline`s organization and its network. Even though a leadership of superior management is believed to be an important factor, it is almost impossible for management to be responsible for all the areas of an airline organization. This is why leadership should be go down to working level people. Self-leadership means that working level people possess leadership, delegated by their superior persons, and improve their work environment with the leadership as well as related right and responsibility. This paper has tried to find out the components of self-leadership perceived by foreign cabin crews and analyzed the impact of self leadership into airline`s organizational effectiveness. Based on empirical research results, this paper would suggest administrative and operational implications of managing foreign cabin crews in K-airline. It was found out foreign cabin crews perceive that self reward and self evaluation have a positive impact on self observation factor. The self observation factor has a significant effect on self goal. The self goal is analyzed as a major factor which results in organizational effectiveness.
A Case Study for Improving the Manufacturing Process of Composite Main Wing for Small Aircraft
Cho, Il-Ryun ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 96~102
DOI : 10.12985/ksaa.2015.23.1.096
Composite materials are widely used as structural materials for manufacturing an aircraft, due to their : low weight, low thermal expansion coefficient, production efficiency, anisotropy, corrosion resistance and long fatigue life. The range of using composite materials has been extended from the fuselage and the wings to the entire aircraft structure. In this paper, by analyzing the problems which were generated while designing and fabricating aircraft structures using composite materials, the differences between metallic structures and composite structures are described. In addition, the methodological improvement directions on design and fabricating are described.
The Study of the Influence of Low Cost Carriers` Web site Service Quality on Customer Loyalty
Hyun, Hye-Won ; Suh, Myung-Sun ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 103~112
DOI : 10.12985/ksaa.2015.23.1.103
In this study, a study was carried out to see what influence low-cost carrier`s e-service quality has on low-cost carrier customers` perceived value and customer satisfaction and what impact the results have on customer loyalty based on the results of previous studies related to e-SERVQUAL, an e-SERVQUAL measurement model for general e-commerce. In addition, a survey of consumers who have experienced using low-cost carrier experience through web sites was conducted. For the analysis of the data collected, SPSS 18.0 was used to conduct frequency analysis, factor analysis, reliability analysis, correlation analysis, and regression analysis and thus to test a hypothesis. Research findings showed that perceived value and customer satisfaction are closely related to customer loyalty, and it was also observed that the reliability factor on the service provided on the web site acts as an important influencing factor for customer loyalty in the perceived value and security factors such as payment by credit cards and protection of personal information serve as important one in terms of customer satisfaction. This study has its limitation in that samples of users who have experienced low-cost carrier are concentrated on specific ages and professions. In the future, it is required to conduct further studies on whether difference is made on the importance of measurement factors related to e-service quality by gender, age group, occupation, and e-service quality.
A Study on Improvement for Optimizing Operations of Firefighting Aviation Corps
Choi, Sung-Ho ; Choi, Yeon-Chul ; Ji, Yong-Sun ; Lee, Young-Jong ; Kim, Dong-Yong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 113~119
DOI : 10.12985/ksaa.2015.23.1.113
Recently, even though firefighting operations are supposed to be incorporated into single body IAW restructuring of the government organizations, in terms of efficiency it is still difficult to find any significant improvements due to the centrally and locally segregated operating bodies and also, as with organizations firefighting manpowers are divided nationally and locally, which results in differing firefighting functioning. Although governments firefighting bodies are changed to operate better, there are always limitations in firefighting operations. This study explores firefighting organizations, manpower, equipment and operations itself to optimize firefighting operations, and ultimately, to provide the future-oriented functions and roles of the firefighting aviation corps.
A study on Improving Operation Efficiency of LCC through Parts Pooling
Choi, Se-Jong ;
Journal of the Korean Society for Aviation and Aeronautics, volume 23, issue 1, 2015, Pages 120~125
DOI : 10.12985/ksaa.2015.23.1.120
Passengers and Airlines wish neither delay nor cancellation due to aircraft defects. However, about 1 delay or cancellation case occurs out of 100 departures worldwide whereas 1 quarter case does in Korean domestic industry. Independent LCC carriers in Korea have almost double case. Most cases are recovered by replacing aircraft components. Airlines have prepared the spare components based on the reliability data by manufacturers to rectify defects or perform preventive maintenances. The total value for initial spares including engine is 40% of the aircraft price when they operate less than 5 aircraft. The more airlines operate the aircraft, the less the ratio of the investment for spares reflecting the economy of scale. This study intends to suggest how to improve the efficiencies as well as the safety of LCC throughout parts pooling including engines.