• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1505-1510
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• 2007

In this paper, the power simulation is used for the prediction of regenerative energy and examination of install location of regenerative inverter for DC railway system. The power simulation was composed to train performance simulation(TPS) and power flow simulation. We performed the power simulation for Seoul subway line 5 and 7, calculation of regenerative energy and examination of substations where regenerative inverter is installed.

• 한국ITS학회 논문지
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• 제14권4호
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• pp.1-9
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• 2015

도로상에 다양한 ITS 장비들의 제어기 함체를 하나의 함체로 물리적 기능적으로 통합하고자 개발중인 통합표준제어기의 설치위치에 대한 논리적인 근거나 도출방법이 마련되어 있지 못하여 현장적용에 어려움이 발생하고 있다. 특히, 노드부와 링크부 등 거리상 여러 곳에 분산 설치된 개별 제어기들을 통합하기 위한 최적의 위치를 도출하는 표준화된 방법론의 정립이 필요하다. 따라서 본 연구는 새로이 개발되는 통합표준제어기의 보다 합리적이며 효율적인 위치결정방법론을 제시하는 것을 목적으로 한다. 이를 위해 여기에서는 도시계획에서 시설입지결정에 활용하는 센트로이드를 활용하여 해결방안을 모색하였다. 분석결과 센트로이드 중에서 모든 장비에 균등한 연계가 가능한 중앙점(central point)의 적용이 가장 합리적인 것으로 나타났으며, 좌표계 설정을 통해 도로상에 정확한 좌표와 존을 설치위치로 제시하고 있다. 본 연구에서 제시한 방법론은 통합표준제어기의 시장 확대에 따른 현장적용에 활용도가 높을 것으로 보인다.

• 한국정보통신학회논문지
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• 제16권5호
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• pp.1083-1094
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• 2012

현재 상용화 되어 있는 위치 추정 시스템은 높은 정확도로 다양한 서비스에 폭넓게 사용되고 있다. 그러나 위치추정 시스템은 실내에서 완벽하게 설치하지 않을 경우 위치 추정 정확도가 매우 좋지 않은 경향을 보인다. 본 논문에서는 Location Fingerprint 기법을 활용하여 완벽하게 설치되지 않은 위치 추정 시스템으로부터 얻은 위치 정보를 보정하여 객체의 위치 정확도를 향상시켜 설치비용을 최소화할 수 있는 실내 위치 추정 알고리즘을 제안한다. 본 논문에서는 실내 환경에서 우수한 위치 정밀도를 제공하는 UWB 기반의 Ubisense 시스템을 활용하였다. 결론적으로, 본 논문에서는 위치 추정 시스템에서 측정한 객체의 위치 정보를 보정함으로써 위치 정확도를 향상시킬 수 있었다.

• 한국지반신소재학회논문집
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• 제13권3호
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• pp.11-19
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• 2014

본 연구에서는 띠형 강보강재에 '${\sqcap}$' 형태의 수동저항부재를 설치하는 보강재에 대한 인발시험 결과를 바탕으로 수동저항부재의 간격 및 설치위치에 따른 간섭효과를 분석하였다. 수동저항부재에서 발현되는 최대수동저항력은 수동저항부재의 설치 위치에 따라 차이가 발생하였으며, 전면벽체에 근접하여 설치된 수동저항부재에서 더 큰 수동저항력이 발현되는 것을 확인하였다. 최대인발력을 사용하여 간섭계수(DI)를 평가한 결과, 지지부재 직경과 간격의 비(S/B)가 동일한 경우에는 수동저항부재의 설치 위치에 따른 인발력 차이를 반영하지 못하는 것으로 평가되었다. 그러나 최대수동저항력을 사용하여 간섭계수(F)를 산정할 경우에는 수동저항부재의 설치 간격뿐만 아니라, 수동저항부재의 설치 위치에 따른 최대수동저항력 차이를 반영하는 것으로 분석되었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 A
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• pp.443-445
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• 2000

This paper describes the assessment of proper location of lightning arrester in combined transmission line which is connected with overhead line and underground cable. The modeling for simulation is established using the actual system in ATP Draw and EMTP. Simulation is carried out to find out the best point to install the arrester in given the model system. And also voltage and current is analyzed on cable covering protection unit(CCPU). The simulation result demonstrated the best location of arrester in the given transmission line through the detailed analysis and its assessment.

• 한국정밀공학회지
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• 제22권2호
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• pp.148-155
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• 2005

This study was carried out to analyze the effect of direction of wind load and machinery house location on the stability of container crane loading/unloading a container on a vessel. The overturning moment of container crane under wind load at 50m/s velocity was estimated by analyzing reaction forces at each supporting point. And variations of reaction forces at each supporting point of a container crane were analyzed according to direction of wind load and machinery house location. The critical location of machinery house was also investigated to install a tie-down which has an anti-overturning function of container crane at the land side supporting point.

• 한국초전도ㆍ저온공학회논문지
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• 제11권4호
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• pp.29-32
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• 2009

This paper proposes the bus-tie application scheme of 154 kV SFCL (superconducting fault current limiter) in Korean power system. The reduced amount of fault current by SFCL is different by where the SFCL is installed. Therefore the inflow ratio of fault current (IRFC) is suggested to consider the effect of an SFCL's location. The proposed scheme was applied to the Korean Power System of 2010, and fault currents were calculated and analyzed with this coefficient. Simulations show that the location with high IRFC is adequate to install SFCL but more consideration of other things is required to determine the location and capacity of SFCL.

• 한국정밀공학회지
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• 제16권9호
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• pp.9-17
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• 1999

This investigation is the result of the structural analysis by finite element method for optimal design of the cross beam with circular holes of the electric car-body. in order to install the air pipe and electric wire pipe that correspond signal between electric machines for the control system and to reduce the weight of the electric car-body, several circular areas from a cross beam should be taken off. What we want to perform is the optimal design of a cross beam with circular holes to posses equal stress in comparison with no hole cross beam. first, no hole cross beam as basic modal be chosen, executing the analysis, reviewing the distribution of stress and displacement at each location. several parameter should be adopted from the cross beam geometry like the location and shape of the hole to affect the maximum stress and displacement. So the analysis was executed by finite element analysis for finding optimal design parameter to the change of the location and shape of the circular hole. finally, the optimal design of the cross beam with circular holes was obtained and the maximum equivalent stress was compared with no hole cross beam at each location.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.47-48
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• 2022

The positioning technology that measures the position of a person or object is a key technology to deal with the location of the real coordinate system or converge the real and virtual worlds, such as digital twins, augmented reality, virtual reality, and autonomous driving. In estimating the location of a person or object at an indoor construction site, there are restrictions that it is impossible to receive location information from the outside, the communication infrastructure is insufficient, and it is difficult to install additional devices. Therefore, this study tested the direct sparse odometry algorithm, one of the visual Simultaneous Localization and Mapping (vSLAM) that estimate the current location and surrounding map using only image information, at an indoor construction site and analyzed its applicability as an indoor positioning technology. As a result, it was found that it is possible to properly estimate the surrounding map and the current location even in the indoor construction site, which has relatively few feature points. The results of this study can be used as reference data for researchers related to indoor positioning technology for construction sites in the future.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2577-2580
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• 2003

In this paper we present a teleoperation system of an internet-based mobile robot based on H.263 image compression algorithm. We control remotely the networked mobile robot with vision over the internet under unknown environments in the real time. The main feature of this system is that local operators need to download and install a client program and so they can command the robot in a remote location. Image information of remote location is compressed by H.263 video codec algorithm and then transmitted to a local operator. We constructed and tested a networked autonomous mobile robot in the real field. The experimental results show the usefulness of the robot under test.