• Proceedings of the PSK Conference
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• 2002.04a
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• pp.110.1-110.1
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• 2002

• Proceedings of the PSK Conference
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• 2002.04a
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• pp.119.1-119.1
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• 2002

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1292-1293
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• 2015

기존에는 전동기 제어기법으로 PI제어기가 주로 사용되어 왔다. 그러나 실제 시스템의 경우 외란과 센서 잡음에 노출되기 쉽고, 모델의 불확실성에 대한 오차가 발생하기 때문에 보다 강인한 제어기법이 필요한 시점이다. $H{\infty}$제어기법은 명령 추종 성능, 시스템 모델 오차와 외란, 센서 잡음에 대해 강인성을 보장하는 고급제어기법으로서 현재 그 성능을 입증 받아 산업분야에서 다양하게 적용되고 있다. 본 논문은 매입형 영구자석 동기전동기(IPMSM)의 속도제어기에 $H{\infty}$제어기와 PI제어기를 적용하여 모의실험을 통한 성능비교를 통해 모델오차와 같은 시스템의 불확실성과 외란에 대해 $H{\infty}$제어기의 강인한 제어성능을 검증하였다.

• Journal of Korea Multimedia Society
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• v.10 no.5
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• pp.631-641
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• 2007

The domestic game market is developmental in the form which is strange produces only the MMORPG. But the level of the intelligence elder brother character is coming to a standstill as ever. It uses a gene algorithm and the neural network from the dissertation which it sees and embodies the character which has a more superior intelligence the plan which to sleep and it presents it does. When also currently it is used complaring different artificial intelligence technologies and this algorism from the MMORPG, the efficiency proves is not turned over and explains the concrete algorithm it will be able to apply in the MMORPG and an embodiment method.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.578-582
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• 2005

In this study, the conceptual foundation and development process of the Antecedent soil Moisture Condition(AMC) in SCS runoff curve number method are reviewed. Although the runoff volume is very sensitive with AMC condition, the AMC class limits developed in SCS(1972) are used in rainfall-runoff analysis without careful consideration. Tn this study, following the SCS curve number development process, rainfall-runoff characteristics of the Jang-Pyung subbasin subject to the Pyung-Chang River basin are analyzed to evaluate the reasonability of the AMC class limits at present. The New AMC class limits are proposed by the sensitive analysis of the antecedent rainfall - curve number value. As a result, the classification value of AMC-I with II is 22mm of antecedent 5-day rainfall amount, and the classification of AMC-II with III is 117mm in growing season. When the New AMC class limits are applied to Jang-Pyung subbasin, AMC probability distribution shows that the AMC-II has increased remarkably even though the AMC-I has a little higher value. But the AMC-III has the smallest one. According to the conceptual basis of the curve number method, the AMC probability distribution, the New AMC class limits adopted, gives reasonable results.

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.123-124
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• 2016

본 논문에서는 단상 BESS(Battery Energy Storage System)용 컨버터/인버터 일체형 전력변환시스템을 제안한다. 양방향전력흐름 제어와 경량화를 위한 일체형 전력변환시스템으로 직류 출력 및 교류 출력이 가능한 일체형 토폴로지를 제안한다. 또한 제안 토폴로지에 대해, 배터리 충전 및 배터리에서 부하로 전력 공급을 위한 제안 토폴로지의 제어 알고리즘을 설계하고 이에 대한 유효성을 시뮬레이션 및 실험을 통해 검증한다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.19-20
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• 2011

본 논문에서는 소형 모바일 로봇의 다개체 제어를 위한 테스트 플랫폼 구축 방법을 소개하고, 제안된 테스트 플랫폼에서 일치제어 알고리듬을 이용한 대형 안정화 및 소형 모바일 로봇들의 군집 이동을 모의 실험하여 그 효용성을 알아본다.

• ETRI Journal
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• v.32 no.5
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• pp.646-656
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• 2010

A component is a reusable and replaceable software module accessed through its interface. Component-based development is expected to shorten the development period, reduce maintenance costs, and improve program reusability and the interoperability of components. This paper proposes a new robot software component platform in order to support the entire process of robot software development. It consists of specifications of a component model, component authoring tool, component composer, and component execution engine. To show its feasibility, this paper presents the analysis results of the component's communication overhead, a comparison with other robotic software platforms, and applications in commercial robots.

• Proceedings of the KSME Conference
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• 2007.05a
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• pp.200-203
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• 2007

Carbon nanotubes (CNTs) have attracted an increasing attention due to their superior mechanical properties and potential application in industries. The strength of CNT has been predicted or calculated through several simulation techniques but actual experiments on stress-strain behavior are rare due to its dimensional limit, nanoscale positioning/manipulation, and instrumental resolution. We have attempted to observe straining responses of a multi-walled carbon nanotube (MWNT) with different growth methods by performing an in-situ tensile testing in a scanning electron microscope. Linear deformation and fracture behaviors of MWNT were successfully observed and its force-displacement curve was also measured from the bending stiffness and displacement of the force sensor and manipulator. We also obtained different tensile load of carbon nanotube with different growth methods.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.1
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• pp.1-6
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• 2008

A flow visualization is conducted to investigate a flight characteristics of a Coleoptera and an effect of flapping elytra was considered in this study. Also the movements of outer wing(elytra) and inner wing is analyzed using High Speed Camera. As a result of this experiment, in case of flapping insect, three mechanisms to generate lift is confirmed. A small movement of outer wing(elytra) is confirmed and the effect of outer wing(elytra) is estimated.