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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 17, Issue 4 - Dec 2009
Volume 17, Issue 3 - Sep 2009
Volume 17, Issue 2 - Jun 2009
Volume 17, Issue 1 - Mar 2009
Selecting the target year
Effects of Liquid Fuel on Spacecraft's Moment of Inertia and Motion during Reorientation
Kang, Ja-Young ; Lee, Sang-Chul ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 1~8
In this paper, reorientation based on angular momentum exchange is applied for a bias momentum stabilized satellite, which is equipped with a spherical fuel tank, and the effect of liquid slosh on the attitude properties such as inertia tensor and angular rate is investigated. In order to represent the slosh motion of liquid an equivalent mechanical model is adopted and full nonlinear equations of motion for three-body system are derived. Computer simulations are performed for several cases, which use the viscosity of liquid and the center location of the tank as input parameters, mainly in order to observe how the viscosity of liquid and the center location of the tank influence the spacecraft’s attitude. The investigation includes observing time-variations of the inertia tensor, especially presence of components of product of inertia during the maneuver.
Development of the Educational Simulator for Aircraft Dynamic Characteristic Analysis with the State-Space Method
Yoon, Sun-Ju ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 9~16
The analysis of an aircraft flight dynamics is recently very convenient because of the introduction of state-space method and a well-developed package software. The representation of a dynamic system is described as a simple form of matrix calculation and the unique form of model is available for the linear or nonlinear, time variant or time invariant, mono variable or multi variable system with state-space method. And this analysis can be simplified with the specific functions of a package software and it is very simplified to execute the simulation of the dynamic characteristics for an aircraft model with an interactive graphical treatment. The purpose of this study is to develope an educational flight simulator for the students who need to analyze the dynamic characteristics of an aircraft that is primarily to execute the simulation for the analysis of the transient response and frequency response of an aircraft stability. Furthermore the dynamic characteristics of an aircraft motion is set up as dynamical animation tool for the control response on 3-axis motions of an aircraft.
Heavy Rainfall prediction using convective instability index
Kim, Young-Chul ; Ham, Sook-Jung ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 17~23
The purpose of this study is possibility of the heavy rainfall prediction using instability index. The convective instability index using this study is Convective Available Potential Energy(CAPE) concerned the growth energy of the storm, Bulk Richardson Number(BRN) concerned the type and strength of the storm, and Sotrm Relative Helicity(SRH) concerned maintenance of the storm. To verify the instability index, the simulation of heavy rainfall case experiment by Numerical Weather Prediction(NWP) model(MM5) are designed. The results of this study summarized that the heavy rainfall related to the high instability index and the proper combination of one more instability index made the higher heavy rainfall prediction.
Reliability Design Using FMEA for Pressure Control Regulator of Aircraft Fuel System
Bae, Bo-Young ; Lee, Jae-Woo ; Byun, Yung-Hwan ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 24~28
The reliability assessment is performed for Pressure Control Regulator of Aircraft Fuel System using reliability procedure which consists of the reliability analysis and the Failure Modes and Effects Analysis(FMEA). The target reliability as MTBF(Mean Time Between Failure) is set to 5000hr. During the reliability analysis process, the system is categorized by Work Breakdown Structure(WBS) up to level 3, and a reliability structure is defined by schematics of the system. Since the components and parts that have been collected through EPRD/NPRD. The predicted reliability to meet mission requirements and operating conditions is estimated as 4375.9hr. To accomplish the target reliability, the components and parts with high RPN have been identified and changed by analyzing the potential failure modes and effects. By changing the configuration design of components and parts with high-risk, the design is satisfied target reliability.
The Design and Construction Consideration for Developing the Human Powered Aircraft
Lee, Ki-Young ; Choi, Seong-Ok ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 29~38
This paper surveys the historical perspective and design considerations for developing the human powered aircraft(HPA). Especially the weight and materials, aerodynamics, flight controls, and power trains are focused. The average power a human can produce and sustain is approximately 200
250 W which is a critical design constraint of HPA. The survey shows that the empty weight of HPA was in the 30
40 kg range(90
110 kg include pilot). Thus, in order to design a successful HPA, the value of power to weight ratio should be 2.0 W/kg or above. The HPA design technique could be applied directly to the development of an unmanned high altitude airplanes used for atmospheric research, where light structures, low Reynolds number aerodynamics and high efficiency propeller design are required as well.
A Study on Development of Wind-Rose software for Planning Runway Direction at an Airport
Sin, D.J. ; Kim, D.H. ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 39~45
An Analysis of wind is essential for planning runway direction. As a general rule, the principal traffic runway at an airport should be oriented as closely as practicable in the direction of the prevailing wind. Aircraft are able to maneuver on a runway as long as the wind component at right angles to the direction of landing and taking-off, the cross wind component, is not excessive. ICAO recommends that runway be oriented so that aircraft may be landed at least 95% of the time with allowable cross wind components not exceeding specified limits based upon the airport reference field length. Based on the recommendation, the direction of the runway or runways at an airport can be determined through graphical vector analysis on wind rose. This study is to develop the wind-rose software for planning the optimum runway direction at an airport with the raw wind data based on reliable wind distribution statistics that extend over as long as a period as possible, preferably of not less than 5 years.
Measuring the characteristic of aerial spray by rotary wing
Lim, Se-Hoon ; Song, Byung-Heum ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 46~51
This paper presents results from field studies carried out to monitor off-target droplet movement of endosulfan insecticide applied to the Korea chestnut tree area. As a results, mean airborne drift values were recorded 25m as average from downwind of a single flight line(sample line) in mountain terrain and mean effective swath width was recorded 19.5m as average in a plain. In terms of characteristics of geography of Korea aerial application is mainly carried out in mountain terrain. The equipment, weather conditions, and appropriate aerial spray technic are required for effective aerial application. In particular, the pilot can get effective results when he only sprays with consideration of environment factors since there is much turbulence in mountain terrain. Eventually, the most effective factor of droplets drift is to estimate the local weather conditions exactly.
Flight Performance of a Dual One-Way Carrier Phase Ranging Instrument
Kim, Jeong-Rae ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 52~57
One of the error sources for microwave ranging is the instability of the oscillator that drives the microwave signals. Dual one-way ranging (DOWR) minimizes the oscillator effect by combining two one-way carrier phase signals from two transmitter/receiver instrument. The DOWR is first implemented in the GRACE (Gravity Recovery and Climate Experiment) satellites. Direct evaluation of the DOWR is not possible due to its extremely high accuracy. The flight performance of the GRACE DOWR is analyzed by applying several indirect methods. Comparison with the design noise level is discussed.
Analysis of Customer Needs upon the Cockpit Layout of a Single Piston Aircraft
Song, Byung-Heum ; Lee, Sang-Chul ; Sung, Hong-Gye ; Moon, Hee-Jang ; Shim, Sang-Hyun ; An, Joon-Sung ; Ko, You-Ri ; Kim, Kwang-Hae ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 58~63
The objective of this study is to analyze customer needs for the configuration of an aircraft cockpit layout of a single piston propeller aircraft. From the result of survey, we figure out the demand of the potential customers. We consider control stick and instrument out of several items to determine which pay for the aircraft or not. We analyze types and features of the aircraft control stick and the instrument which are equipped in the same aircraft in order to figure out what is best needed through a market survey and a questionnaire survey.
A Study on Flight Phobia and the Countermeasure
Ahn, Y.T. ; Choi, Y.C. ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 64~70
Because of globalization, flight trips are generalizing, however in proportion to this, it is increasing that people who afraid of riding an airplane because of flight phobia. ‘Flight Phobia’ is individual problem; however it can be factors to suspend of flight schedules. This research is experimental analyzed the recognition degree of flight attendants and cabin attendants about flight phobia and suggested the direction of management about related problems. This research examines meanwhile overlooked importance of flight phobia and the actual condition and if problems are happened, this research will be used valuable to manage quickly and safely.
A Study on the Effects of Helicopter Pilot's Working Career to Situation Awareness
Choi, Sung-Ho ; Choi, Yeon-Chul ; Lee, Yeong-Heok ; Jeon, Jeong-Dae ;
Journal of the Korean Society for Aviation and Aeronautics, volume 17, issue 1, 2009, Pages 71~76
According to U.S. NTSB, accidents of scheduled airliners from 1989 to 1992 caused by the lack of SA consisted of approximately 80% of all aircraft accidents, which emphasized the importance of maintaining SA. Furthermore, all of the 27 domestic helicopter accidents between 1996 and 2005 were related with pilot SA and of these, 21 events were directly attributed to pilot errors. Therefore, SA is a matter of great importance to pilots. Following the pre-study of the relations between SA and pilot qualifications, the results of this study which deals with SA and pilot working careers show the statistical importance between those two factors.