• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.616-621
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• 2003

Until now, many networked robots have been connected to the Internet for the various applications. With these networked robots, very long distance teleoperation can be possible through the Internet. However, the promising area of the Internet-based teleoperation may be distance learning, because of several reasons such as the unpredictable characteristics of the Internet. In robotics class, students learn many theories about robots, but it is hard to perform the actual experiments for all students due to the rack of the real robots and safety problems. Some classes may introduce the virtual robot simulator for students to program the virtual robot and upload their program to operate the real robot through the off-line programming method. However, the students may also visit the laboratory when they want to use the real robot for testing their program. In this paper, we developed an Internet-based robot education system. The developed system was composed of two parts, the robotics class materials and the web-based Java3d robot simulator. That is, this system can provide two services for distance learning to the students through the Internet. The robotics class materials can be provided to the student as the multimedia contents on the web page. As well, the web-based robot simulator as the real experiment tool can help the students get good understanding about certain subject. So, the students can learn the required robotics theories and perform the real experiments from their web browser when they want to study themselves at any time.

• 대한기계학회논문집A
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• 제22권2호
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• pp.391-398
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• 1998

The intake noise, a major source of vehicle noises, has rapidly become a noticeable, and has been studied to reduce the level. Traditionally, the intake system has been developed through the road test and the experiment using a engine dynamo, namely, the trial and error process. This approach require very high cost and long time consuming to develop the system. In this study, the simulator which had a speaker in the cylinder head was presented. It was easy to analyze the acoustic characteristic of the intake system in laboratory environment. This study presented a improvement to reduce the level of the intake noise using the Transfer Matrix Method and NIT/SYSNOISE, FE analysis commercial software. It was to select optimum position of a resonator and verified by the simulator. This simulator can be used early in the design stage of development of the intake system.

• Journal of Advanced Marine Engineering and Technology
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• 제36권8호
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• pp.1117-1122
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• 2012

연료전지를 선박에 적용하는 연구를 위해서는 연료전지 특성을 고려한 전력 시스템 설계 및 부하 제어에 대한 연구가 필요하다. 하지만 연료전지를 직접 실험하기 위해서는 여러 보조기기들과 복잡한 제어 기술이 필요하다. 이러한 이유로 연료전지 시뮬레이터가 필요하며, 이를 위한 연구가 활발히 진행중이다. 본 논문에서는 자동차, 소형 선박 등에 적용되고 있는 PEMFC에 관하여 LabVIEW를 기반으로 시뮬레이션 하였다. 또한 이러한 시뮬레이션 데이터를 바탕으로 프로그램이 가능한 전력공급장치를 이용하여 시뮬레이터를 제작하여 연료전지의 특성을 구현하였다. 이를 통해 연료전지의 분극화 곡선과 변수에 따른 I-V특성을 확인할 수 있었다.

• 전기학회논문지P
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• 제58권4호
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• pp.427-431
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• 2009

In this study, the dynamic characteristic of a contact wire and pantograph suppling electrical power to high-speed trains are investigated from an electrical response point of view. To analysis power line disturbance by induced contact loss phenomenon for high speed operation, a hardware Simulator which considered contact loss between contact wire and the pantograph as well as contact wire deviation is developed. It is confirmed that a contact wire and pantograph model are necessary for studying the dynamic behavior of the pantograph system. One of the most important needs accompanied by increasing the speed of high-speed train is reduced that an arc phenomenon by loss of contact brings out EMI. In case of a high-speed train using electrical power, as comparison with diesel rolling stock, PLD(Power Line Disturbance) such as harmonic, transient voltage and current, EMI(Electromagnetic Interference), dummy signal injection etc usually occurs. Throughout experiment, it is verified that an arc phenomenon is brought out for simulator operation and consequently conducted noise is flowed in electric circuit by power line disturbance.

• 한국항행학회논문지
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• 제13권5호
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• pp.630-638
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• 2009

본 논문에서는 SCADE를 사용하여 항공기 안전필수 시스템인 공중충돌회피시스템(TCAS-II)을 위한 통합 시뮬레이터를 설계한다. 이 TCAS-II시뮬레이터는 기존의 충돌회피 알고리즘의 문제점을 분석하고 실제 공중충돌 상황을 더욱 현실성 있게 시스템 평가에 반영할 수 있도록 편리한 통합시뮬레이션 환경을 반영하여 구현한다. 또한 안전 필수요건인 소프트웨어 국제표준 신뢰성 요건을 만족하면서 실제로 실험할 수 없는 상황에 대한 TCAS-II의 성능분석 및 새로운 충돌회피 로직 연구를 위한 시나리오 편집기를 제시하고 이를 사용하여 전형적인 공중충돌 시나리오에 대한 시뮬레이션을 통해 그 성능을 검증한다.

• 전자공학회논문지CI
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• 제47권4호
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• pp.118-124
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• 2010

본 논문에서는 상황별 RFID(무선주파수식별) 물류 적재 시뮬레이터를 구현하였다. 이를 위하여 RFID의 적용 및 인식률에 영향을 줄 수 있는 환경요소들을 모델링하여 인식률 실험을 체계적으로 수행할 수 있도록 하였다. 실제로 물류 현장에 적용시켰을 때 보다 적은 시간과 비용으로 상황별 최적의 RFID 물류 적재 방법을 찾아 개선한 사례를 제시한다. 물류 현장에서 RFID 인식률을 높이기 위해 본 시뮬레이터를 사용하여 RFID 인식 실험데이터를 축적하였다. 이를 통해 본 논문에서 제안된 시뮬레이터가 시행착오를 줄이고 효과적으로 최적화된 RFID 물류 적용 안을 찾아낼 수 있다는 것을 실험치를 기준으로 증명 하였다.

• 한국지능시스템학회논문지
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• 제23권1호
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• pp.29-34
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• 2013

본 논문은 애드혹 통신을 기반으로 아이폰의 가속도 센서를 사용하여 이동로봇을 무선 제어하는 연구에 대하여 다룬다. 이동로봇을 아이폰으로 무선제어하기 위한 방법으로 사용자 원격제어와 자율제어 방법이 제안되었다. 궤적 추종제어 알고리즘의 효율성을 평가하기 위하여 아이폰의 인터페이스를 기반으로 모니터에 그려진 궤적을 가상로봇이 추종하는 시뮬레이터를 개발하였다. 제안된 시뮬레이터에서는 궤적 추종제어를 위해 이동로봇을 제어할 때 컴퓨터에서 해당 알고리즘을 이용하여 미리 시뮬레이션이 가능하며 사용자에 의한 원격제어와의 결과 비교도 보여준다. 연구의 결과로 제안된 시뮬레이터가 이동로봇에 자율이동제어 방법을 사용할 때, 자율추종 알고리즘의 적합성과 효율성을 미리 검사 하는데 사용될 수 있음을 보여준다.

• 한국환경과학회지
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• 제25권1호
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• pp.155-161
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• 2016

In this study, field experiment, odor simulator, and dispersion modeling were used to evaluate the odor impact from J sewage sludge treatment facility. The height and flow rate of exhaust stack at this facility were 22.3 m and $100Nm^3/min$. The mean odor concentrations of the wet scrubber inlet and exhaust stack were $267{\pm}160$ and $93{\pm}44OU/m^3$, respectively. The odor removal efficiency of wet scrubber showed 65%. The odor simulator is used for the regulated standard calculation of the exhaust pipe(stack). Resulting odor emission rate(OER) by odor simulator was $2.4{\times}10^6(24,000OU/m^3)$. The forecasting result by Screen3 modeling showed that odor exhaust concentration up to $30,000OU/m^3$ was't exceeded maximum allowable emission level on site boundary($15OU/m^3$).

• 한국자동차공학회논문집
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• 제10권5호
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• pp.190-198
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• 2002

Full scale durability test in the laboratory is an essential of any fatigue life evaluation of components or structures of the automotive vehicle. Component testing is particularly important in today's highly competitive industries where the design to reduce weight and production costs must be balanced with the necessity to avoid expensive service failure. Generally, hydraulic road simulator is used to carry out the fatigue test and the vibration test. In this paper, the algorithm and software to realize the real road profile are developed. The operation software for simultaneously controlled multi-axial road simulator is developed and the input and output data are displayed window based PC controller in the real time. Futhermore, the software to generate the real road profile are developed. The validity of the software are verified by applying the belgian road, the city road, the highway, and the gravel road. The results of the above experiment show that the real road profiles are realized well after 10th iteration.

• 대한인간공학회지
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• 제31권5호
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• pp.637-646
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• 2012

Objective: The aim of this study was to develop the adaptive device for severe physical disabilities using smart device in the driving simulator and its performance evaluation. Development of appropriate driving adaptive device for the people with serious physical limitation could contribute to maintain their community mobility. Background: There is lack of adaptive driving devices for the people with disabilities in Korea. However, if smart device systems like iPod and iPhone are used for driving a car, the people with serious physical limitations can improve their community mobility. Method: Both gyroscope and accelerometer from iPod were used to measure the tilted angle of the smart device for driving. Customized Labview program was also used to control three axis motors for steering wheel, accelerator and brake pedals. Thirteen subjects were involved in the experiment for performance evaluation of smart device in simulator. Five subjects had driver licenses. Another four subjects did not have driver licenses. Others were people with disabilities. Results: Average driving score of the normal group with driver license in the simulator increased 46.6% compared with the normal group without driver license and increased 30.4% compared with the disabled group(p<0.01). There was no significant difference in the average driving score between normal group without driver license and disabled group(p>0.05). Conclusion: The normal group with driver license showed significantly higher driving score than other groups. The normal group without driver license and disabled group could improve their driving skills with training in simulator. Application: If follow-up studies would be continued and applied in adapted vehicle for on road environment, many people with more severe disabilities could drive and improve the quality of life.