• 항공우주기술
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• 제7권1호
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• pp.1-7
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• 2008

국토해양부 지원을 통해 수행되는 KA-32 훈련용 헬기시뮬레이터 개발 프로그램의 목적은, FAA AC 120-63의 레벨 C 요구규격을 충족하는 헬기 시뮬레이터를 개발하는 것이다. 한국항공우주연구원(KARI)은 개발 총괄 프로그램을 주관하고 있으며, 또한 비행 역학 모델을 개발하고 시뮬레이터 설계 데이터와 비행 시험 데이터에 기초를 충실도를 검증하는 업무를 담당하고 있다. 대상 헬기는 산림항공관리소에서 운용되고 있는 Kamov KA32T이다. 비행시험은 7월 30일에서 8월 31일까지 익산 산림항공관리소에서 수행되었다. 본 논문은 시뮬레이터 검증을 위한 비행시험데이터 획득에 필요한 장비장착 및 비행시험에 대한 내용을 기술하고 있다.

• 한국산학기술학회논문지
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• 제20권4호
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• pp.510-516
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• 2019

본 논문에서는 사용자의 동작을 측정하고 물리적인 변화를 사용자에게 느끼게 하여 실제 스노우보드를 즐기는 것 같은 스노우보드 시뮬레이터를 개발하였다. 스노우보드는 사용자의 무게중심에 따라 속도와 방향이 결정된다. 개발된 시뮬레이터는 스노우보드 플레이트에 4개의 스프링을 장착하여 사용자의 무게 중심의 변화에 따라 기울기를 변화시켜 스노우보드의 기울기 변화를 직접 느낄 수 있게 하였다. 사용자의 무게중심의 변화에 따른 기울기는 3축 가속도센서를 사용하여 측정하였다. 스노우보드의 회전에 따라 발생하는 슬로프의 마찰을 BLDC 모터를 사용하여 사용자가 느낄 수 있도록 하였고, 스노우보드의 회전은 홀센서를 사용하여 측정하였다. 시뮬레이터의 빠른 데이터 처리를 위해 두 개의 MCU를 사용하여 가속도 센서와 모터를 별도로 사용하여 측정된 데이터를 PC로 전송하였다. 개발된 시뮬레이터는 슬로프의 경사 및 마찰을 직접 경험할 수 있으며, 측정된 데이터와 HMD를 착용하여 보다 현실감이 있는 스노우보드를 즐길 수 있도록 하였다.

• Industrial Engineering and Management Systems
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• 제13권3호
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• pp.267-277
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• 2014

In this paper, we propose an educational system that involves a business game simulator and related curriculum. To develop these two elements, we examined the decision-making process related to business management and identified some significant skills thereby. In addition, we created an original simulator, named BizLator (http://bizlator.com), to help students develop these skills efficiently. Next, we developed a curriculum suitable for the simulator. We confirmed the effectiveness of the simulator and curriculum in a business-game-based class at Aoyama Gakuin University in Tokyo. On the basis of this, we compared our education system with a conventional system. This allowed us to identify advantages of and issues with our proposed system. Furthermore, we proposed a speech recognition support system named BizVoice in order to provide the teachers with more meaningful feedback, such as level of students' understanding. Concretely, BizVocie fetches students' speech of discussion during the game and converts the voice data to text data with speech recognition technology. Finally, teachers can grasp students' parameters of understanding, and thereby, the students also can take more effective class using BizLator. We also confirmed the effectiveness of the system in the class of Aoyama Gakuin Universiry.

• 한국멀티미디어학회논문지
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• 제21권6호
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• pp.698-704
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• 2018

When the new ammunition is designed, it is necessary to confirm in advance how long the target distance is depends on the shape and weight of the designed ammunition. Therefore we can use commercial software such as PRODAS to predict the target distance in the design stage. This commercial software has aerodynamic data for various ammunition shape and calculates the target range by calculating the kinetic equations of the ammunition using the aerodynamic data most similar to the designed ammunition. The ammunition for predicting the target distance through software such as PRODAS is a non-guided ammunition that has no control after launch but the glide type ammunition is guided and control ammunition. So it is predicts the state of ammunition after the launch. A new type of simulator is needed to analyze the maximum range and to verify the onboard guided and control algorithm. The simulator constructed in this paper is an optimized simulator for glide type ammunition. Unlike unmanned aircraft and guided missiles. The rotation characteristics of the ammunition are considered and the navigation initialization algorithm is applied. The constructed simulator confirmed the performance by performing maximum range analysis of glide type ammunition.

• 한국자동차공학회논문집
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• 제13권2호
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• pp.37-43
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• 2005

A haptic steering system which reflects steering reaction torque has been developed for a fixed base vehicle simulator. The haptic steering system consists of a steering effort sensor, MR-clutch, AC servo motor and controller. In order to generate realistic steering torque feel to driver and at the same time to meet real-time simulation requirement, 3D torque map is constructed by experimental data and torque generation algorithm using the torque map has been also developed. 3D torque map is constructed using curve fitting and interpolation of the measured values of the steering angle, velocity and steering torque from actual slalom test on the proving ground. In order to carry out performance test of the developed haptic steering system, a fixed based vehicle simulator is constructed by integrating real time vehicle dynamics module, VR-video/audio module, and the haptic steering system. Steering torque and steering angle curves have been obtained from virtual testing in the vehicle simulator and performance of the haptic steering system has been evaluated.

• 전기학회논문지
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• 제56권8호
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• pp.1373-1381
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• 2007

This paper presents a graphical windows-based software for the education and training of transmission network charge. The motivation for the development of the simulator is to provide students with a simple and useable tool for gaining an intuitive feel for transmission network charge. The developed simulator consists of the main module (MMI, GUI), the power flow module (PF), the power flow tracing module (PFT), and usage cost DB module (UCD). Each module has a separate graphical and interactive interfacing window. The developed simulator provides with two power system analysis methods (i.e., DC-PF and Modified DC-PF) and supports the PSS/E input data format to load input data of power system. Also, power flow tracing can be calculate using four methods such as "Felix Wu", "Modified Felix Wu", "DCLF ICRP", and "Reverse MW mile". Results of calculation for transmission usage cost are displayed and compared on the window through the table and/or chart. Therefore, the developed simulator can be utilize as a useful tool for effective education and training of transmission network charge.

• 조명전기설비학회논문지
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• 제20권9호
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• pp.18-23
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• 2006

This paper presents an operator training simulator for power system restoration against massive blackout. The system is designed especially focused on the generality and convenient setting up for initial condition of simulation. The former is accomplished by using power flow calculation methodology, and PSS/E data is used to set up the initial state for easy setting. The proposed simulator consists of three major components-a power flow(PF), a data conversion(CONV), and, a GUI module. The PF module calculates power flow, and then checks over-voltages of buses and overloads of lines. The CONV module composes a Y-Bus array and a database at each restoration action. The initial Y-Bus array is composed from PSS/E data. A user friendly GUI module is developed including a graphic editor and a built-in operation manual. The maximum processing time for one step operation is 15 seconds, which is adequate for training purpose.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.362-367
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• 2005

Control network adopted in the national power-plant or manufactory are mostly vendor-dependent products, which have their own special specification, components and individual communication methods. These systems not only raise installation cost, but also bring many difficulties to maintenance and extension. To overcome these problems, this paper introduces a development and application case of a new "PC/Ethernet-based fieldbus" architecture and protocol to be used in mid-level fieldbus. The designed system has a basic idea of "3 Layers fieldbus over Standard-LAN" and implemented on PCs. PC gives user friendly environment. By using an open standard Ethernet in layer 1,2, the system has low cost, wide communication bandwidth and high compatibility. Layer 3 protocol designed for large realtime data communication makes user bypass TCP/IP layer and gives user direct access to the Ethernet. This new protocol eliminates potential collision of Ethernet, and transmits large periodic/non-periodic control data by using long-frame/wide-bandwidth of Ethernet effectively, and offers simple API-Services to the upper layer. Since the system have installed in H-power plant simulator and U-nuclear power plant simulator in Korea, it have been proved to be efficient and stable without any trouble in realtime communication service for full-scope plant simulator that has a lot of control elements.

• 상하수도학회지
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• 제35권5호
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• pp.351-365
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• 2021

Water treatment process simulator is the tool for predicting sequential changes of water quality in a train of unit processes. This predicts the changes through governing equations that represent physicochemical performance of each unit processes with an initial and boundary conditions. Since there is no operational data for the design of a water treatment facility, there is no choice but to predict the performance of the facility by assuming initial and boundary conditions in virtual reality. Therefore, a simulator that can be applied in the design stage of a water treatment facility has no choice but to be built as a numerical analysis model of a deductive technique. In this study, we had conducted basic research on governing equations, inter-process data-flow, and simulator algorithms for the development of simulators. Lastly, this study will contribute to design engineering tool development research in the future by establishing the water treatment theory so that it can be programmed in a virtual world and suggesting a method for digital transformation of the water treatment process.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2189-2196
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• 2015

환경오염 및 유류비가 증가함에 따라 선박 에너지 절감 방안에 대한 연구가 활발히 진행되고 있다. PCS(Pump Control System)는 선박냉각시스템에서 해수펌프 회전속도, 청수펌프 회전속도 및 3-Way V/V 위치 제어를 통해 에너지를 절감하는 펌프제어시스템이다. 본 논문에서는 PCS의 신뢰성 확보를 위해 실 선박의 냉각시스템과 유사한 환경을 갖춘 PCS 시뮬레이터를 개발하였다. 또한 PCS 시뮬레이터를 위한 컴퓨터 기반의 제어 시스템 및 데이터 저장시스템을 개발하였다. 제어 및 데이터 저장시스템 개발에는 National Instrument 사의 cDAQ 및 LabVIEW를 사용하였다. 최종적으로 저장된 데이터를 분석하여 시뮬레이터의 동작을 확인하였다.