• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 A
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• pp.51-54
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• 1992

Protection and control systems play a prominent part in avoiding power delivery interruptions and help to get a fast and secure restoration when a failure occurs. In order to meet the higher functional requirements on modern power system, protection speed, selectivity, sensitivity, dependability, and security are essential to ensure reliability. These functions on be satisfied by taking advantage of microprocessor and communication technologies, and digital protection relays (systems) have been developed and applied to real power system enhancing reliability and saving money. It is necessary to have a tool to analyze the functions and algorithms of digital relays for installing them to power system. The purpose of this study is to develop a digital relay simulation program to estimate digital relay performances during system faults. Components of digital protective relay including analog filter, sampling unit, digital filter, and relay logic are modeled in this program.

• 디지털산업정보학회논문지
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• 제13권3호
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• pp.35-42
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• 2017

This paper presents hardware implementation of background timing-skew calibration technique for time-interleaved analog-to-digital converters (TI ADCs). The timing skew between any two adjacent analog-digital (A/D) channels is detected by using pure digital Finite Impulse Response (FIR) delay filter. This paper includes hardware architecture of the system, main units and small sub-blocks along with control logic circuits. Moreover, timing diagrams of logic simulations using ModelSim are provided and discussed for further understanding about simulations. Simulation process in MATLAB and Verilog is also included and provided with basic settings need to be done. For hardware implementation it not practical to work with all samples. Hence, the simulation is conducted on 512 TI ADC output samples which are stored in the buffer simultaneously and the correction arithmetic is done on those samples according to the time skew algorithm. Through the simulated results, we verified the implemented hardware is working well.

• 디지털융복합연구
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• 제4권1호
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• pp.17-30
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• 2006

Recently, Modeling and Simulation, which have been received attention in various in dustries such as national defence, eduction and entertainment, have been researched, and related applications have been developed actively. Especially, it is focused on the to chnology of a virtual reality and a virtual simulation which represents the implementation technology for the simulation education related to the e-Learning industry. However, a solution is needed to fulfill the lack of technology and research about standardize d data elements which could be applied to virtual simulation technologies in common. Therefore, this article suggests the virtual simulation data elements to increase the educational effect of a virtual simulation and interoperability of data among LMS through reference to korean and international standards and the result of related area analysis. In other words, this article aims to define the expression of data element and to propose the guideline elements in the virtual simulation scope.

• 전기학회논문지P
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• 제55권4호
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• pp.183-189
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• 2006

In this work, the digital simulator for testing of digital protective relay is presented. The proposed simulator software has EMTP simulation data file conversion, sequence waveform generation, user define simulation data generation, communication engine, data analysis engine and measurements function etc. The simulator hardware is designed using 32bit floating point DSP architecture to achieve flexibility and high speed operation. This simulator is tested to evaluate the performance of relay simulator by using a output data of simulation model on EMTP.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.237-239
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• 2001

This paper describes the digital relay simulator system using digital signal processor. The simulator system has two parts, one is software and the other is hardware part. The simulation software has variety calculation engines ; EMTP simulation data file conversion, user define simulation data generation, sequence data generation, data analysis engines. etc, these are designed upon GUI. And simulator software provides easy control interface for users, the simulator software performs on every MS Windows OS. The simulator hardware design uses 32bit floating point DSP(TMS320C32) architecture to achieve flexibility and high speed operation.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.453-457
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• 2005

Existing manufacturing system has consumed too much energy, space and resource in micro parts manufacturing. To improve this, micro factory system is suggested. But it is difficult to get the high reliability in the assembly, production and inspection of the minute parts because the construction of the micro factory has been started just before. In this study, we will build the digital manufacturing simulation on the micro factory's process and verify the production and assembly process using this simulation.

• 패션비즈니스
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• 제18권6호
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• pp.57-66
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• 2014

The purpose of this study is to design appropriate digital tools for the production of makeup designs. In this study, we used a three-dimensional facial avatar simulation program developed by the Electronics and Telecommunications Research. This study is based on the creation of three-dimensional CG digital art of facial avatar makeup, produced by using simulation technology. First, the actual application and the tools for digital-optimization and media features were created, leading to the research and cleanup. Second, the theoretical background was applied to the formative elements of oriental colors in the designing process. Makeup design elements include point, line, surface, color, and texture. In this study, effective makeup design was interpreted to be based on the representation of particular elements, notably the design principles of balance, proportion, rhythm, repetition, emphasis, contrast, harmony, and unity. In Asia, design is based on the visibility of red, blue, black, yellow, and white-the colors of the five elements-and the use of points, lines, and shapes. This study was recently under scrutiny in relations to digital simulation and various three-dimensional designs, in terms of how to take advantage of a wide range of applications, and how to apply the findings through media and the dissemination of basic research. This study applies the characteristics of the limited existing stereoscopic three-dimensional and digital simulation programs in order to take advantage of the empirical research, providing a basis to implement this research in a meaningful way. A follow-up study is needed to extend these findings and theoretical foundation through continuous observation and in-depth technical development and research.

• 융합정보논문지
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• 제11권4호
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• pp.19-25
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• 2021

본 연구는 수작업으로 이루어진 제조현장에서 제조 프로세스를 최적화할 수 있도록 시뮬레이션을 통한 디지털 트윈 구현 방안을 제안하고자 한다. 수작업 모션을 센서로 수집하고 동작 인식에 대하여 반복적인 실험데이터로 제조 프로세스를 최적화하는 지식관리메커니즘을 제안 범위로 한다. 연구목적 달성을 위하여 물류현장 모의실험을 실시하였는데, 작업자의 경험으로 나타난 기초적 지식에 작업시뮬레이션을 반복 경험하게 함으로써 최적화된 디지털 트윈을 생성할 수 있는 방안을 마련하였다. 실험결과, 디지털 트윈을 생성하는 시뮬레이션으로 보다 빠른 시간내에 작업공간 구성과 작업 특성을 생성하여 최적화된 자원을 구성한 결과를 물리시스템으로 전송함으로써 제조 프로세스의 지속적 개선이 가능한 것으로 파악되었다.

• 한국시뮬레이션학회논문지
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• 제32권3호
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• pp.33-41
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• 2023

최근 전 세계가 탄소중립에 관심이 높아지면서 재생에너지 발전량이 증가하고 있다. 하지만 재생에너지는 간헐성과 변동성이 심해 발전량 예측이 어렵고, 정확하지 않은 발전량 예측은 전력 계통에 부정적인 영향을 끼칠 수 있다. 이에 본 연구에서는 풍력발전기 발전량 예측 문제를 해결할 방법으로 디지털트윈 개념을 적용하였다. 풍력발전기의 회전이 발전량과 높은 상관관계를 갖는 부분을 반영하여 풍력발전기 드라이브트레인 회전 거동을 주로 모의하는 기계학습된 모델을 개발하였다. 회전 거동을 모의하는 드라이브트레인 시뮬레이션 모델의 기반은 잘 알려진 회전 시스템을 모의하는 시스템 상태방정식으로 설정되었다. 또한 제조사로부터 제공되지 않은 파라미터들에 대하여 시뮬레이션 기반 기계학습을 수행하였다. 기계학습된 드라이 브트레인 모델은 27개의 실제 풍력발전기 운영데이터 세트를 활용하여 검증되었다. 검증 결과, 드라이브트레인 모델은 실제 풍력발전기 운영데이터 세트와 비교하여 평균 4.41%의 오차를 보였다. 결과적으로 기계학습된 드라이브트레인 모델은 실제 풍력발전기 드라이브트레인 시스템을 잘 모사한다고 평가하였다.

• 패션비즈니스
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• 제17권1호
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• pp.145-156
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• 2013

The purpose of this study is to demonstrate the stage costumes realized by digital clothing ; how realistic and accurate representation of empirical testing and in the consultation process for the production stage costumes, determine whether digital clothing has value that can be substituted for the stage costume. This study researched the stage costume manufacture, Isabel's costume of the musical 'Christmas Carol', process by using the 3-D clothing simulation technology : DC Suite. The results of this study is as following. They share many similarities between the stage costumes and digital clothing. It is possible that digital clothing takes a role as a substitute for stage costumes in the production process of the clothing samples. The clothing production system, including stage costumes, by digital clothing costs and lead time can be saved by innovative. Also the result can be saved without restriction, and this system can exert its effect in a very efficient way to incorporation of foreign producers and production system.