• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.179-182
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• 1997

In a training simulator for power plant, operator's action in the MCR(Main Control Room) are given to plant process and computer system model as an inputs, and the same response as in real power plant is provided in real time. Inter-process communication and synchronization are especially important among various inputs. In the plant simulator, to simulate the digital control system such as FOXBORO SPEC-200 Micro control system, modification and adaptation of control card(CCC) and its continuous display station(CDS) is necessary. This paper describes the modeling and simulation of FOXBORO SPEC-200 Micro control system applied to Younggwang nuclear power plant unit #3 & 4, and its integration process to the full-scope replica type training simulator. In a simulator, display station like CDS of FOXBORO SPEC-200 Micro control system is classified as ITI(Intelligent Type Instrument), which has a micro processor inside to process information and the corresponding alphanumeric display, and the stimulation of ITI limits the important functions in a training simulator such as backtrack, replay, freeze and IC reset. Therefore, to achieve the better performance of the simulator, modification of CDS and special firmware is developed to simulate the FOXBORO SPEC-200 Micro control system. Each control function inside control card is modeled and simulated in generic approach to accept the plant data and control parameter conveniently, and debugging algorithms are applied for massive coding developed in short period.

• Journal of Electrical Engineering and Technology
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• 제5권1호
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• pp.61-69
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• 2010

This paper presents a study of a DFIG wind power generation system for real-time simulations. For real-time simulations, the Real-Time Digital Simulator (RTDS) and its user friendly interface simulation software RSCAD are used. A 2.2MW grid-connected variable speed DFIG wind power generation system is modeled and analyzed in this study. The stator-flux oriented vector control scheme is applied to the stator/rotor side converter control, and the back-to-back PWM converters are implemented for the decoupled control. The real-wind speed signal extracted by an anemometer is used for a realistic, reliable and accurate simulation analysis. Block diagrams, a mathematical presentation of the DFIG and a control scheme of the stator/rotor-side are introduced. Real-time simulation cases are carried out and analyzed for the validity of this work.

• 정보처리학회논문지D
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• 제12D권2호
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• pp.319-326
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• 2005

최근 정보기술, 가전기술, 그리고 통신기술이 융합된 정보가전 기기들이 가정 내에 나타나고 있으며, 이러한 환경에서는 흠 네트워크를 통해 이들 기기들 사이의 상호작용 및 실시간 제어를 지원하는 모니터링 기술이 요구된다. 본 논문에서는 실시간 서비스를 지원하는 TMO(Time-triggered Message-triggered Object) 스킴을 적용하여 정보가전 동작객체들을 구현하고, TMOSM(TMO Support Middleware)을 이용한 분산 실시간 서비스 지원 플랫폼 구조에서 이들의 원격제어 및 모니터링 서비스를 제공하는 실시간 정보가전 제어 시뮬레이터를 구축했다. TMO로 구현된 정보가전기기들은 자치적인 동작으로 주거정보의 교환이 가능하며, 새로운 기기의 추가로 인한 정보가전들의 수행환경을 편리하게 재구성 할 수 있다. 본 시뮬레이터를 구축하기 위해, 분산 실시간 서비스 지원 플랫폼 상에서 가정 내 온도관리, 조도관리, 시간관리 제어서비스를 수행하는 정보가전 동작 TMO들의 기능과 그들 간의 원격 상호작용을 설계했다. 마지막으로 분산 플랫폼 상에서 정보가전기기들의 시뮬레이션 환경을 구현하여 실제 기기들로 대응되는 정보가전 동작객체들의 실시간 제어 및 모니터링 서비스 과정이 주어진 수행조건에 따라 정확하게 수행하는지를 보였다.

• Journal of Power Electronics
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• 제14권3호
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• pp.444-457
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• 2014

This paper presents the design and realization of a digital PV simulator with a Push-Pull Forward (PPF) circuit based on the principle of modular hardware and configurable software. A PPF circuit is chosen as the main circuit to restrain the magnetic biasing of the core for a DC-DC converter and to reduce the spike of the turn-off voltage across every switch. Control and I/O interface based on a personal computer (PC) and multifunction data acquisition card, can conveniently achieve the data acquisition and configuration of the control algorithm and interface due to the abundant software resources of computers. In addition, the control program developed in Matlab/Simulink can conveniently construct and adjust both the models and parameters. It can also run in real-time under the external mode of Simulink by loading the modules of the Real-Time Windows Target. The mathematic models of the Push-Pull Forward circuit and the digital PV simulator are established in this paper by the state-space averaging method. The pole-zero cancellation technique is employed and then its controller parameters are systematically designed based on the performance analysis of the root loci of the closed current loop with $k_i$ and $R_L$ as variables. A fuzzy PI controller based on the Takagi-Sugeno fuzzy model is applied to regulate the controller parameters self-adaptively according to the change of $R_L$ and the operating point of the PV simulator to match the controller parameters with $R_L$. The stationary and dynamic performances of the PV simulator are tested by experiments, and the experimental results show that the PV simulator has the merits of a wide effective working range, high steady-state accuracy and good dynamic performances.

• 한국시뮬레이션학회논문지
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• 제13권2호
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• pp.45-52
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• 2004

This paper presents a prototype visualization system of mixed reality for a VR flight simulator. The chroma key technique is used to build the mixed reality model for a VR flight simulator. The Daedeok science town can be visualized in real time according to the rider control. He can also see his own hand/foot operating the control stick/rudder as well as virtual environment projected to the blue-screen using a video-see-through HMD.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.3037-3039
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• 2005

The AIS(Automatic Identification System) transmits the position of ships and other information to prevent accidents which could occur in the sea. It has to be developed SOTDMA(Self-Organized Time Division Multiple Access) Algorithm which is important on wireless communication method for the AIS because It is based on ITU(International Telecommunication Union) M.1371-1 of the international standard therefore, we need to develop a performance evaluation simulator efficiently to develop and analyze SOTDMA Algorithm. this paper shows the method of designing it. Real ships access The VHF maritime mobile band but in this performance evaluation simulator several ship objects access the shared memory. Real ships are designed as the object and the wireless communication channel is designed as the shared memory. The ships apply for real virtual data which got from assistance hardware and The SOTDMA Algorithm driving state verifies the performance evaluation simulator by IEC(International Electrotechnical commission) 61993-2. After verifying results the performance evaluation simulator is correctly satisfied with IEC 61993-2. So we expect that it helps not only the AIS technology developed but also verify new SOTDMA Algorithm

• 한국음향학회지
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• 제23권1호
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• pp.17-23
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• 2004

일반적으로 무선 이동 채널은 협대역 스펙트럼을 갖는 복소 랜덤 프로세스로 모델링된다. 본 논문에서는 TMS320C6414 DSP칩과 XC2VP30 FPGA칩을 사용한 페이딩 신호의 실시간발생에 대해 기술한다. 여기서 제시된 시뮬레이터는 플랫 페이딩 및 주파수 선택성 페이딩 채널의 일반적인 모델로 그 대상으로 하였으며 여러 다양한 채널 왜곡 현상을 모사할 수 있도록 설계되었다. 시뮬레이터는 다음 세가지 기본적인 채널 특성을 포함한다; 레일리 페이딩, log-normal shadowing, 주파수 선택성 페이딩. DSP의 연산부담을 최소로 하면서 이동 채널의 통계 특성을 재현하기 위해 multi-rate신호처리 기법이 사용되었다. 채널 파라미터 값을 변화시키면서 많은 실험을 행하였고, 시뮬레이터에서 실시간 출력된 채널 포락선들의 각 통계 특성이 이론치와 일치됨을 확인했다.

• 한국정보통신학회논문지
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• 제26권2호
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• pp.278-287
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• 2022

기술발전에 따라 드라이빙 시뮬레이터는 다양한 용도로 활용되고 있다. 드라이빙 시뮬레이터 실험에서 시나리오 개발은 실험결과의 신뢰를 높이고 연구목표를 달성하며 운전자에게 보다 실제같은 경험을 제공하는데 필수적이다. 그러나 시나리오를 개발하는데 데이터베이스 형성과 실시간 시나리오 운영 등에는 아직도 제약이 많다. 본 연구는 이러한 환경에서 실제 도로에서 실시간 주행속도와 기상데이터를 수집하고 활용하는데 가능성을 확인하고자 한다. 또한 본 연구를 통해 아두이노 센서 데이터와 공공API 데이터를 연계하는 방안도 제시하고자 한다. 연구결과의 검증을 위해 실제도로에서 시험을 실시했으며 본 연구를 통해 드라이빙 시뮬레이터에서 실시간 데이터를 활용한 시나리오 개발에 도움이 될 것으로 기대한다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1998년도 추계학술발표회요약집
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• pp.195-195
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• 1998

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.654-659
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• 2001

In the virtual environment, reality can be enhanced by offering the motion based on a motion simulator in harmony with visual and auditory modalities. In this research, the Stewart platform based motion simulator has been developed. This motion simulator is driven by the electric motors, and offers the slightly wider workspace compared to the commercial available simulators. In order to compensate for the limited range of the motion platform, the washout filters with fixed coefficients have been usually adopted. In this paper the new approach is proposed to tune the filter coefficients based on the fuzzy logic on the real-time basis. It is shown that performance with the variable filter coefficients is better than that with the fixed ones. The driving simulator based on the bicycle dynamics was developed by integrating the motion simulator and graphic system.