• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.203-206
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• 2006

In this study, the method of designing the flexible wing model which will be used for wind tunnel testing of gust response alleviation system was presented. The design concept proposed herein was validated by performing the modal testing of the flexible wing model manufactured for demonstration purpose. In addition, the study on the gust response alleviation using flexible wing control surface was performed. For this purpose, optimal control with output feedback was adopted for designing the control surface controller, and the effects of gust response alleviation was validated by performing the numerical simulation for the representative flexible wing model. The methods proposed and validated in this study can be applied for wind tunnel testing of the flexible wing for gust response alleviation.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.11a
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• pp.174-178
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• 1999

현재 농가에 많이 보급되어 있는 플라스틱피복 파이프 온실은 폭설이나 돌풍을 비롯한 강풍하에 놓이게 되면, 피복재의 파손이나 구조적인 붕괴현상으로 인하여 온실내 재배작물이 치명적인 피해를 입는 경우가 발생하게 된다. 실예로 1994년 2월 12일의 폭설과 1995년 7월 23일의 태풍 등 최근 2년을 연속하여 폭풍이나 강풍으로 막대한 피해를 경험한 바 있으며, 1997년 11월 12일의 나주 돌풍, 1998년 1월 8일 서부 경남지역의 강풍을 동반한 폭설, 1999년 8월 3일에 상륙한 태풍 올가 등은 온실과 같은 경량구조물의 안전을 크게 위협하고 있다. (중략)

• Proceedings of the KSME Conference
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• 2001.06b
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• pp.495-500
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• 2001

The dynamic behavior of high speed train is very important because it should be safe and is satisfied with the ride comfort of passengers. The railway is composed of many suspension components-1st springs, 1st dampers, 2nd springs, 2nd dampers etc- that have an influence on the dynamic characteristics of high speed train. Also, the wheel/rail shapes, the track condition and geometry and many environmental factors-rain, snow, wind etc-are affected the dynamic behavior of high speed train. This paper is reviewed the effect of wind(gust) on the dynamic behavior of high speed train. Vampire program is used for this simulation. The result of simulation shows that high speed train should not be operated when the gust speed is beyond 34.5m/sec.

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.508-512
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• 2004

An aerospace vehicle in flight can be exposed to random gust which may cause critical structural failure. In this paper, the failure analysis is conducted for composite wing subjected to random gust. For this, the profile of random gust is idealized as a stationary Gaussian random process and the power spectral density (PSD) of wing bending moment induced by gust is obtained. The PSD function is converted to probabilistic distributions and the failure probability during total flight time is calculated by Monte Carlo simulation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.426-428
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• 2013

울산항처럼 정박지가 외해에 위치한 항만의 경우 기상예보도 없이 갑작스런 돌풍이 불게 되면 정박선들의 닻 끌림으로 인한 위험은 물론 정박지를 항해하는 선박들과의 충돌위험에 노출되게 된다. 본 논문에서는 돌발적인 기상악화로 정박지에서 발생하는 위험의 유형에 대해 살펴보고, 기상악화에 대한 사전 대비가 왜 어려운지에 대해 고찰하였다. 그에 대한 해결 방안으로 정박지에서의 선박들의 안전을 위한 해상교통관제센터의 돌풍 대비 운영 매뉴얼을 개정하는 방법을 제시하였다.

• 전기의세계
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• v.36 no.10
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• pp.741-749
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• 1987

본고의 내용은 다음과 같다. 1. 노풍압 및 풍속자료 2. 설계용 풍압의 상정과정 3. 재현기간별 극치풍속 및 돌풍풍속 산정 4. 미관측지역의 기준풍속(압)산정 5. 설계 기준풍압

• The Science & Technology
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• v.2 no.4 s.8
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• pp.31-35
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• 1969

서론 1.학자교환 2.과학정보 및 자료교환 3.태평양지역의 지구과학 4.생물과학 5.의학 6.과학교육 7.돌풍 및 태풍 8.농업잔해 한일과학협정에 대한 제언

• The Optical Journal
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• v.14 no.2 s.78
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• pp.44-45
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• 2002

MFP시대는 복사기나 프린터, 팩시밀리를 포함한 업계의 자연 도태의 돌풍이 불고 있다는 것을 시사해 주고 있다. SAL시대와 같이 가격인하, 성능뿐만 아니라 소프트나 시스템 구축을 포함한 솔루션 판매가 가능한지의 여부에 모든 것이 걸려있다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.30 no.6
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• pp.69-77
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• 2002

To acquire the dynamic response and design the controller of the airship, the longitudinal motion of the airship with respect to the vertical gust, which is the nonlinear system, was studied. The effects of the apparent mass and moment of the airship delay the dynamic response and the settling time, which are slower than those of conventional airplanes. The current object of the airship is designed to cruise at 500~1000m altitude. At that height, the atmospheric conditions are generally unstable by wind gust. In this paper, it has been studied for the case of vertical gust, since the apparent mass effects are dominant in has been studied for the case of vertical gust, since the apparent mass effects are dominant in that plane. In addition to the study of the dynamic responses of the airship, the controller was designed using the PID-controller. When the gust was applied, airship responses were recovered of equilibrium states. However, it takes too ling time for recovery and the speed of airship is reduced. So, the aim in this paper was to fasten the recovery speed and to get back the cruising velocity. The control parameters were determined from the stability mode analysis, and the control inputs were the thrust and the elevator deflection angle.

• Vending industry
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• v.8 no.3
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• pp.38-41
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• 2008

앞으로 피자자판기 품목이 일반식품자판기 시장의 새로운 트렌드로 등장할 것으로 보인다. 아직 제품이 활발히 보급되는 단계는 아니지만 몇몇 신규업체에서 시장 도전을 준비하고 있기 때문이다. (주)굿앤푸드벤딩시스템도 이중 한 업체로 30초 만에 조각피자가 제공되는 피자자판기를 선보이며 본격적인 시장공략에 나섰다. 뛰어난 맛과 편리성을 장점으로 하는 조각피자자판기가 침체된 일반식품자판기 시장에 있어 일대 돌풍을 불러일으킬 수 있을까?