• Proceedings of the Korea Society for Simulation Conference
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• 1994.10a
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• pp.12-12
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• 1994

Simulation output knowledge analysis is one of problem-solving and/or knowledge adquistion process by investgating the system behavior under study through simulation . This paper describes an approach to simulation outputknowldege analysis using fuzzy neural network model. A fuzzy neral network model is designed with fuzzy setsand membership functions for variables of simulation model. The relationship between input parameters and output performances of simulation model is captured as system behavior knowlege in a fuzzy neural networkmodel by training examples form simulation exepreiments. Backpropagation learning algorithms is used to encode the knowledge. The knowledge is utilized to solve problem through simulation such as system performance prodiction and goal-directed analysis. For explicit knowledge acquisition, production rules are extracted from the implicit neural network knowledge. These rules may assit in explaining the simulation results and providing knowledge base for an expert system. This approach thus enablesboth symbolic and numeric reasoning to solve problem througth simulation . We applied this approach to the design problem of broadband communication network.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.525-528
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• 1993

KEPCO Research Center is carrying out a simulator(full scope replica type) development project for two nuclear power plants(Kori-2, Younggwang-3,4) and one fossil power plant(Poryong-3,4). In this project, we aim not only the installation of high performance simulators at the power plant sites but also the realization of self reliance of power plant simulation technology in Korea. In the course of preparing procurement specification for the 3 simulators, the present status of power plant simulation technology has been surveyed and is presented in this paper. The fidelity of simulation and the automation of simulation model production has been greatly improved due to the ever increasing computing power of today's workstations. The need and importance of the application of high fidelity simulators to the operator training is refocused since the accident at TMI Nuclear Power Plant, U.S.A.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2015.11a
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• pp.89-91
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• 2015

사회의 발전과 더불어 현시대에는 지역적으로 특성화된 재난의 급증과 함께, 각종 재난 유형의 복합화와 대형화가 일어나고 있는 실정이다. 이에 반하여 현재 적용되고 있는 재난대응 훈련의 조치들은 증가하는 재난의 위험에 발맞추지 못한 채 한계에 부딪쳐 답보중인 상태이다. 이에 따라 재난대응역량 강화를 위하여 현장의 긴박한 상황을 이해하여 빠른 상황판단을 할 수 있는, 현실감 있고 생동감 있는 훈련 시뮬레이터의 개발이 추진되고 있다. 더불어, 훈련 시뮬레이터의 개발뿐 아니라 시뮬레이터의 효율적인 이용과 변화하고 있는 현대 재난에 대한 발 빠른 대응을 위하여, 기존의 단편, 부분적인 훈련 시스템을 탈피한 새로운 훈련 시뮬레이터에 대응하는 훈련 방안과 재난대응훈련 평가체계 방법에 관한 연구도 필요한 실정이다. 본 논문에서는 개발되고 있는 증강현실기반 시뮬레이터를 활용한 재난대응 훈련 방안 개발 내용을 소개하며 연구의 목표와 기대성과에 대해서 설명하고자 한다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2015.11a
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• pp.75-77
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• 2015

본 논문에서는 증강현실기술을 사용하여 재난 대응 훈련에서의 효과성을 높이기 위한 시뮬레이터 개발용 시나리오의 작성에 대해서 소개하였다. 기존의 재난 대응 훈련은 시나리오의 비현실성, 훈련내용의 부실로 인한 실효성의 부족 등의 문제로 인하여 효과성 측면에서 문제가 제기되어 왔으며, 세월호 사건은 그러한 문제점이 직접적으로 드러난 재난으로 꼽히고 있다. 점차 다양화, 복잡화되는 재난에 따라 실질적인 훈련과 다양한 기능, 부처간 연계를 위한 훈련체계가 요구되는 현실에 맞춰 재난대응에 있어 통합훈련의 필요성이 대두되고 있다. 시뮬레이터에 사용되는 시나리오는 단순한 도상훈련이 아닌 직접 체험할 수 있다는 점에서 기존의 훈련 시나리오와는 다른 성격을 가지며, 실효적 재난대응을 위해 국내 외 사례에서 기반한 재난대응의 문제점을 분석하고 그것을 집중적으로 훈련할 수 있도록 하고 있다. 또한 여러 돌발적인 이벤트 상황이 발생하더라도 그에 적절한 대응방안을 함께 제시하고 있다.

• Journal of the Korean Institute of Navigation
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• v.18 no.4
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• pp.1-9
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• 1994

Assessment of the safety of ship's transit in the narrow channel consist of the maneuvering safety determined by the chance of running aground, the maneuvering difficulty determined by ship's workload and master's subjective evaluation. To examine the relation between master's subjective evaluation and maneuvering safety, this utilizes a real-time and full-mission shiphandling simulator in the Korea Marine Training & Research Institutes(KMTRI). The vessel chosen was 60,000-ton, Panamax-type ship. The findings regarding master's subjective evaluation were as follows: -Relation between master's subjective evaluation and common logarithms of stranding probability is linear. -Stranding probability with more than 0.001 is master's subjective evaluation with more than 5.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.474-475
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• 2014

모의 풍력발전 실험을 하기위해서 실제 지역의 풍력데이터를 기반으로 발전되는 전력에 대하여 고려를 하여야하지만 시뮬레이션하기 어려운 점이 있다. LabVIEW는 하나의 데이터로 다양한 데이터표현이 가능하며, 프로그램 설계가 쉽다는 장점이 있다. 본 논문에서는 LabVIEW 기반의 소프트웨어 풍력시뮬레이터를 설계하고, 파라미터 설정변화에 따른 풍력발전량의 변화를 시뮬레이션을 통하여 확인하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.135-138
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• 2005

Robotic devices have been widely used in many medical applications due to their accuracy and programming ability. One of the applications is a virtual reality medical simulator, which trains medical personnel in a computer generated environment. In this paper, we are going to present an application, an epidural anesthesia trainer. Because performing epidural injections is a delicate task, it demands a high level of skill and precision from the physician. This trainer uses a robotic device and computer controlled solenoid valve to recreate interaction forces between the needle and the various layers of tissues around the spinal cord. The robotic device is responsible for generation of interaction forces in real time and can be used to be haptic guidance that allows the user to follow a previous recorded expert procedure and feel the encountered forces.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1687-1688
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• 2015

본 연구에서는 기존에 개발된 가상현실 기반 대형 기계설비 안전대응 훈련 시스템의 현장 적용성 향상을 위한 시뮬레이터 운영 기술 연구에 관해 소개한다. 먼저 안전훈련 대상 시설에 대한 현실적인 사고 및 훈련 시나리오를 개발하였고, 이를 기반으로 훈련 운영자가 시뮬레이터를 효율적으로 운영하기 위한 시나리오 분기제어 및 모니터링 기능을 포함하는 훈련 시뮬레이터 통제 프로그램의 설계와 개발 결과를 소개한다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.28 no.4
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• pp.125-131
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• 2020

In order to study the correlation between the pilot's cognitive ability and recovery ability by applying a physical element that can cause spatial loss of position to the pilot, a turntable was installed on the top of the motion system to give a quantitative rotational error. We propose a method of simulating flight movement to reduce a difference in feeling and an intuitive method of forward kinematic analysis.

• Nuclear Engineering and Technology
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• v.54 no.6
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• pp.2037-2047
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• 2022

The contribution of degraded human performance (e.g., human errors) is significant for the safety of diverse social-technical systems. Therefore, it is crucial to understand when and why the performance of human operators could be degraded. In this study, the occurrence probability of human errors was empirically estimated based on the complexity of proceduralized tasks. To this end, Logistic regression analysis was conducted to correlate TACOM (Task Complexity) scores with human errors collected from the full-scope training simulator of nuclear power plants equipped with analog devices (analog environment). As a result, it was observed that the occurrence probability of both errors of commission and errors of omission can be soundly estimated by TACOM scores. Since the effect of diverse performance influencing factors on the occurrence probabilities of human errors could be soundly distinguished by TACOM scores, it is also expected that TACOM scores can be used as a tool to explain when and why the performance of human operators starts to be degraded.