• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.11a
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• pp.546-549
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• 2004

The T-50/A-50 Golden Eagle was developed for a supersonic trainer and light combat aircraft. At the design stage, vibration control plans were established and applied. For cockpit vibration, crew comfort vibration level was defined by the requirement of MIL-A-8892. It is found that the T-50/A-50 meets the requirement of cockpit vibration from the flight test data analysis. This paper contains the results of cockpit vibration analysis using the flight test data and the results of human vibration analysis lot the pilot inside aircraft. The human vibration level of pilot is increased as dynamic pressure is increased and at the specific high dynamic pressure, the ride comfort indicates 'a little uncomfortable'. Overall analysis results show that the vibration level of T-50/A-50 cockpit is tolerable and not critical for pilot's comfort.

• Advances in aircraft and spacecraft science
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• v.10 no.4
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• pp.369-391
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• 2023

In our research we have offered a solid solution for aeronautical analysis. which can guarantee the asymptotic stability of coupled nonlinear facilities. According to the theoretical solutions and methods presented, the engine of this aircraft is a small high-bypass turbofan engine. using the non-linear aero-motor control approach and this paper focuses on the power management function of the aero-motor control system. These include static controls and transient controls. A mathematical model of the high-bypass-ratio two-spool unmixed-flow aeroengine was developed through a set of nonlinear dynamic equations verified by experimental data. A single actuator using the displacement method is designed to maintain a certain level of thrust under steady-state conditions. and maintains repeatable performance during transient operation from the requested thrust phase to the next. A single controller can compensate for the effects of noise and harmonic noise at many performance points. And the dynamic performance of a single controller is satisfactory during the transient. for fairness Numerical and computer experiments are described in the perfection of the methods we offer in research.

• Journal of the Korea Institute of Building Construction
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• v.11 no.3
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• pp.310-318
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• 2011

Due to the lack of a noise and vibration survey for military air bases, noise and vibration are not taken into consideration for new installations, which has resulted in a number of problems, including the separation of tiles. Furthermore, it is not possible to establish appropriate counter-vibration plans to minimize damage resulting from vibration on structures, since no standard is in place when location for residence areas, including military quarters, is determined. In this context, this research includes a noise and vibration survey, on which basis a quantitative evaluation model for vibration of structure by aircraft noise is generated, as well as through linear regression analysis, and suggests installation standards by purpose of structure, minimizing the damage due to noise and vibration, and establishing appropriate counter-vibration plans for future installation and repairs of on-base structures in the military bases.

• 한국항공운항학회:학술대회논문집
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• 2005.05a
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• pp.79-82
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• 2005

• Journal of Korean Society of Environmental Engineers
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• v.29 no.2
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• pp.144-152
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• 2007

• The Korean Journal of Air & Space Law and Policy
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• v.13
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• pp.231-248
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• 2001

• The Korean Journal of Air & Space Law and Policy
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• v.13
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• pp.303-324
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• 2001

• The Korean Journal of Air & Space Law and Policy
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• v.13
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• pp.27-70
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• 2001

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.7
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• pp.720-725
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• 2016

This study examined how the APU noise of an aircraft influences the work efficiency and stress of airport ramp workers. A survey of airport ramp workers was conducted and the results analyzed. In the demographic analysis, men outnumbered women - accounting for 86% of the survey target - and 80% of the respondents were found to be employees with less than 15 years of work experience. The occupational cluster of the total of 160 respondents included 41 aircraft maintenance workers, 70 ground staff (Cargo, Water and Waste services), 19 ramp coordinators, 18 ramp controllers and 12 catering Service workers. The ground staff were the most prevalent, constituting 44% of the occupational cluster. Regarding the APU noise, 74% of the respondents answered that the environment was "always noisy", while 26% answered that it was "sometimes noisy". 85% answered that they are sensitive to and put under stress by the APU noise, while the majority of the respondents answered that the APU noise degrades their work efficiency. In conclusion, this study examined the effect of APU noise on the work efficiency and stress of airport ramp workers by analyzing the survey data by Regression and Chi-square analysis.

• Korean Journal of Psychosomatic Medicine
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• v.8 no.2
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• pp.181-190
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• 2000

This study describes the relationships between aircraft noise and stress and subjective noisy perception by comparing with two areas where the airport is adjacent or not. One area is Yipam-dong and Hak-dong expected to have louder aircraft noise because Kangnung Airport is near the area, and the other area is Songjung-dong as a control. For this study, we used telephone-survey which was targeted to two hundreds people of each area through the random sampling method. The design of the study is cross sectional study and the unit of analysis is a person. As the result of the multiple regression and logistic analysis, under the control of the other control variables, the both stress levels and subjective noisy perception of Yipam-dong and Hak-dong people significantly higher than that of Songjung-dong people and the people graduated middle school had significantly higher both stress levels and subjective noisy perception than the people graduated high school. In the future more studies have to be made that include concrete medical and psychiatric health problems.