• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.349-352
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• 2005

The energy management of an HEV using optimal control and global optimization is thought to be closest to the best operation of the system. However, there are some controversies on the ways of defining the optimization problems and constituting the optimal control simulators. Here, we presented a simulator which adopts the concept of equivalent fuel economy and leads the vehicle to run in a more efficient way. In order to realize the optimal operation of the HEV and check the validity of the control logics, we also developed a forward-facing simulator. The simulator was developed with the Cruise and MATLAB co-simulation interface. Especially, neural network controller was used for the hybrid control module in the simulator. With the simulator, the optimal operation could be converted into hybrid control rules and the validity of the operation was verified.

• 한국정밀공학회지
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• 제32권9호
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• pp.825-831
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• 2015

In this paper, capture motion and visual information from a virtual reality luge simulator to analyze muscular activity in the lower limbs. The Luge Simulator consists of a motion platform with a pneumatic module for weight distribution. We recruited luge athletes and healthy subjects and made real-time surface EMG measurements to estimate the muscular activity in the lower limbs according to the motion protocol of a simulator, and a test was conducted for each subject. The results indicated that the rectus femoris had the highest muscular activity according to the level of the slope and velocity of the luge. The soleus muscle showed a high level of activity during a turn in the luge according to the direction. We found that the development of a virtual reality sports simulator based on physical reaction results could bring positive effects to optimize reality and human cenesthesia.

• 한국산업융합학회 논문집
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• 제18권2호
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• pp.75-81
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• 2015

This study proposes an articulated robot control system using an on/off-line robot graphic simulator with multiple networks. The proposed robot control system consists of a robot simulator using OpenGL, a robot controller based on a DSP(TMS320) motion board, and the server/client communication by multiple networks. Each client can control the real robot through a server and can compare the real robot motion with the virtual robot motion in the simulation. Also, all clients can check and analyze the robot motion simultaneously through the motion image and data of the real robot. In order to show the validity of the presented system, we present an experimental result for a 6-axis vertical articulated robot. The proposed robot control system is useful, especially, in the industrial fields using remote robot control as well as industrial production automation with many clients.

• 한국도로학회논문집
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• 제16권6호
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• pp.129-136
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• 2014

PURPOSES : This study devotes its energies to estimate greenhouse gas emissions for types of horizontal highway designs. METHODS : This paper suggested two types of road scenarios, scenario 1 is made by the lack of road design consistency. Beside scenario 1, scenario 2 is made by good road design. For comparisons of greenhouse gas emissions, driving simulator was used. RESULTS : Emission rates of road scenario 1 are 1.4 times higher than scenario 2 in the driving simulator. CONCLUSIONS : This study may have important implications for contributing to the application of road alignment technology for reduction of greenhouse gases as quantifying the correlations between greenhouse emissions and various road alignments. Consequently, this study will help road designers determine which roads are best alternatives in the process of choosing the roads in the future in terms of environmental benefits.

• 전기학회논문지
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• 제64권7호
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• pp.1026-1030
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• 2015

In this paper, we propose a signal processing board of an optical delay simulator for evaluating a long-range laser range finder and a laser target designator. We improved the accuracy by applying the clock multiplication and the correction of error gradient. To evaluate the performance of the proposed method, we implemented a prototype board and performed experiments. As a result, we implemented the optical delay simulator with resolution less than 0.7m in measuring distance 60km and a standard deviation of 0.041m. The PRF code detection logic and generation logic have a stability less than 0.03% and 0.08% compared to the NATO standard, respectively.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2001년도 제33회 춘계학술대회 개최
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• pp.265-270
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• 2001

Hip joint simulator which Is an essential device for evaluating the wear of biomaterials (ultrahigh molecular weight polyethylene, Co-Cr alloy, alumina, etc.) used in total hip joint replacement was developed. This hip joint simulator mimics the joint motion and joint loading of human gait by adapting the 4 degree of freedom in kinematic motion (flexing/extension, adduction/abduction, Internal rotation/external rotation) and axial loading, Four stations are operated by 8 servo-motors and harmony drives. Joint leading was imposed by displacement control from a ball screw, LM guide, and spring system. Each kinematic link system operates separately or coupled modes. A heater and a thermocouple were installed for keeping the body temperature in each station.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 금형가공,미세가공,플라스틱가공 공동 심포지엄
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• pp.66-75
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• 2005

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 2003년도 한국해안해양공학발표논문집
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• pp.18-27
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• 2003

The goal of the UN Framework Convention on Climate Change (UNFCCC) is to stabilize atmospheric CO2 concentration for preventing global warming in future. However, there are many unknown factors regarding stabilization of CO2 concentration. What level of concentration should be appropriate to prevent global warming？ When should we stop the increase of CO2 concentration\ulcorner What kind of countermeasures of reducing CO2 emission will be available for CO2 stabilization？(omitted)

• 지구물리와물리탐사
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• 제9권1호
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• pp.67-72
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• 2006

지하 염수층의 $CO_2$ 주입은 큰 저장 능력으로 인하여 대기 중으로의 $CO_2$ 방출을 감소시키기 위한 가장 유망한 방법일 것이다. $CO_2$ 저장은 적어도 수 천년 간 $CO_2$가 지층 안에 안전하게 남아있도록 주의깊게 계획되고 모니터링되어야 한다. 특히 해양 저류층에 대한 탄성파 탐사 방법들은 알맞은 저류층특성이 제공된다면 $CO_2$의 주인공정과 분산을 모니터링하기 위한 일차적인 수단이다. 탄성파탐사 방법은 잠재적인 트랩, 저류층 특성, 저류층 저장능력의 규명에 또한 필수적이다. 따라서 $CO_2$ 저장에 대한 탄성파 반응의 변화에 대한 평가는 매우 초기 단계에 이루어져야 한다. 이것은 모암과 $CO_2$ 사이의 화학적 작용에 의해 일어날 수 있는 유체의 특성이나 광물 조성의 변화에 따른 탄성파 반응에서의 잠재적 변화를 평가하기 위해 나중 단계에 다시 고려될 필요가 있다. 따라서 저류층에 일정시간 이상의 $CO_2$ 주입에 의한 탄성파 반응 변화에 대해 섬세히 구축된 모형은 장기간의 모니터링 프로그램 설계에 도움을 준다. 그러한 목적으로 주입된 $CO_2$에 대한 단기간과 장기간의 4차원 탄성파 반응을 모델링하도록 설계된, 그래픽 사용자 인터페이스((GUI)를 채택한 암석물리학 모의실험장치를 개발했다. 적용분야는 $CO_2$ 위상 변화, 국부적인 압력과 온도 변화, 화학 반응 및 광물의 침전을 포함한다. 이방성 가스만(Gassmann) 식을 모의실험장치에 고려시킴으로써 단층과 파쇄대를 재활성화 시키는 $CO_2$의 탄성파 반응 또한 예측될 수 있다. 이 논문에서는 암석물리학 모의실험장치를 적용했던 현장(해상과 육상의 잠재적 $CO_2$ 격리 지역)의 사례를 보여주고 있다. 4차원 탄성파 반응들이 모니터링 프로그램의 설계를 돕기 위하여 만들어 졌다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.461-463
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• 2001

This paper looks into the characteristics of CVT's ferroresonant suppression filter-using RTDS(Real Time Digital Simulator).