• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1051-1059
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• 2008

In the development process of an ECU (Electrical Control Unit), numerous tests are necessary to evaluate the performance and control algorithm. The vehicle based test is expensive and requires long time. Also, it is difficult to guarantee the safety of the test driver. To overcome the various problems faced in the development process, the ECU test has been done using HIL (Hardware In the Loop). The HIL environment has the actual hardware including an ECU and a virtual vehicle model. In this paper, the test platform environment is devloped for the AWS ECU black box test. The test platform is built on HIL (Hardware In the Loop) architecture. Using the developed test platform, the control algorithm of the AWS ECU can be evaluated under the virtual driving condition of the bi-modal tram. Driving conditions, such as a front steering angle and vehicle velocity, are defined through the PC (Personal Computer) input. Input signals are transformed to electrical signals in the PC. These signals become the input conditions of the AWS ECU. The AWS ECU is stimulated by arbitory input conditons, and responses of the system are observed.

• 한국산학기술학회논문지
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• 제18권10호
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• pp.794-805
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• 2017

본 논문에서는 풍력발전기의 제어시스템에 대한 성능평가를 위한 실시간 처리 기반의 Hardware-In-Loop(HIL) 시뮬레이터와 안정적으로 운용할 수 있는 시스템 제어 알고리즘을 제시한다. 기존의 수행된 연구는 모터와 발전기가 결합되어 동력이 전달되는 구조로서, 소형풍력발전기의 발전기 토크와 전력변환장치의 대한 특성분석으로 그 시험 범위가 제한적이나, 제안하는 실시간 처리 기반의 풍력발전기 시뮬레이터를 통해서 정상운전과 비상운전을 포함하여 제어시스템의 알고리즘과 하드웨어 요소에 대한 시험 성능평가가 가능하다. 한편, 제안하는 시뮬레이터는 세부적으로 하드웨어와 동기화되어 운영 될 수 있도록 MATLAB, CODER 그리고 PLC Library를 활용하여 동적모델과 제어시스템을 포함한 실시간 처리 기반의 풍력발전기 모듈, 바람 데이터를 생성/처리하는 모듈, 전력계통 모듈 그리고 전체 시뮬레이터의 운용을 위한 'Host PC'로 구성된다. 실제 풍력발전기가 설치되는 환경을 기반으로 외부적/내부적인 요소를 변수로 다양한 시나리오에 대한 시험을 수행하여, 풍력발전기 제어시스템의 성능평가를 통하여 본 논문에서 제시한 HIL-시뮬레이터의 우수성과 효용성을 입증한다.

• 정보보호학회논문지
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• 제29권4호
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• pp.867-875
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• 2019

원자력을 포함한 산업제어시스템에 대한 사이버보안 사건이 증가함에 따라 기술적 보안 조치와 더불어 사이버보안교육 훈련 및 사이버 비상사건 대응 훈련이 요구되고 있다. 대상 설비를 운영 관리하는 담당자들에게 효과적인 사이버보안 인식 및 교육 훈련을 위해서는 센서 수준에서부터 발전소 운영 상태까지 사이버공격으로 인한 영향 분석이 가능한 훈련용 시스템이 요구된다. 이에 본 논문에서는 원자력 운영 상태를 모사하는 발전소 시뮬레이션과 특정 계통의 시뮬레이션 및 물리장치를 포함하는 원자력발전소 사이버보안 훈련용 HIL 시스템을 개발하였다. 이를 통해 계통담당자 및 사이버보안조직을 대상으로 하는 기술적 훈련, 사이버보안 조직 및 비상사건대응 조직을 대상으로 하는 특화된 사이버보안 훈련을 지원하고자 한다.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2011년도 한국우주과학회보 제20권1호
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• pp.32.2-32.2
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• 2011

State dependent Riccati equation (SDRE) control technique has been widely used in the control society. Although it solves nonlinear optimal control problems, which minimizes state error and control efforts simultaneously, it has drawbacks when it is to be applied to the real time systems in that it requires much computational efforts. So the real time system whose computational ability is limited (for example, satellites) cannot afford to use SDRE controller. To solve this problem, a hybrid controller which is based on MSDRE (Modified SDRE) and ANFIS (Adaptive Neuro-Fuzzy Inference System) has been proposed by Abdelrahman et al. (2010). We propose a hybrid controller based on SDRE and ANFIS, and apply the hybrid controller to the hardware attitude simulator to perform a HIL (Hardware-In-the-Loop) simulation. Through HIL simulation, it is demonstrated that the hybrid controller satisfies the control requirement and the computation load is reduced significantly. In addition, the effects of statistical properties of the ANFIS training data to the performance of the ANFIS controller have been analyzed.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1046-1049
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• 2004

The improvement in OLEDS performance is correlated with the surface chemical composition, hole injection and electron injection. In this study, a new hole injection material, HIL202(NPB derivatives), was synthesized and the devices with the structure of ITO/HIL202/NPB/$Alq_3$/Liq/Al were fabricated. The devices with a new hole injection material showed the improved current density, luminance and life time then the NPB or conventional hole injection material based OLEDs, due to the improved adhesion morphology between ITO surface and hole injection material.

• 한국자동차공학회논문집
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• 제6권2호
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• pp.155-167
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• 1998

The prevalence of microprocessor-based controllers in automotive systems has greatly increased the meed for tools which can be used to validate and test control systems over their full range of operation. The objective of this paper is to develop a real time simulator of an anti-lock braking system and the methodology of using hardware-in-the-loop simulation based on a personal computer. By use of this simulator, the analyses of a commercial electronic control unit as well as the validation of the developed control logics for ABS were performed successfully. The simulator of this research can be traction applied to development of more advanced control system, such as traction control systems, vehicle dynamic control system and so forth.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1616-1625
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• 2007

Recently, embedded systems role as control systems instead of mechanical control systems in many parts of vehicles. In cases that embedded systems are used controling the electric signal, it is important to secure the reliability of a software within embedded systems. In this paper, the test platform for securing the reliability and real-time characteristic of the embedded system that controls electric signal of All Wheel Steering Control System in a Bi-modal tram is proposed. The platform is built on a HIL (Hardware In the Loop) architecture. Through the HIL platform, various vehicle conditions, driver activities and environment conditions can be successfully tested without actual driving, hence improving the reliability of the embedded system for the All Wheel Steering Control System.

• 전력전자학회논문지
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• 제24권3호
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• pp.191-200
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• 2019

This study proposes a hardware-in-the-loop simulation (HILS) system based on National Instruments' PXI platform to test power management and operation strategies for DC microgrids (MGs). The HILS system is developed based on the controller HIL prototype, which involves testing the controller board in hardware with a real-time simulation model of the plant in a real-time digital simulator. The system provides an economical and effective testing function for research on MG systems. The decentralized power management strategy based on the DC bus signaling method for DC MGs has been developed and implemented on the HILS platform. HILS results are determined to be similar to those of the off-line simulation in PSIM software.

• 전기전자학회논문지
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• 제24권3호
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• pp.706-712
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• 2020

유기전기발광소자(Organic light diodes, OLEDs)의 전기발광특성을 향상시키기 위해, 본 논문에서는 용액 공정 정공주입층으로 신규 hexaazatrinaphthylene(HATNA) 유도체들을 도입한 고효율 녹색인광 OLED소자의 특성을 연구하였다. HATNA 유도체는 Indium Tin Oxide(ITO)의 일함수와 비슷한 낮은 the lowest unoccupied molecular orbital(LUMO) 에너지 준위를 가져 다른 개념의 정공주입 메커니즘을 보여주었다. HATNA 유도체를 hole injection layer(HIL)로 사용한 OLED소자들은 HTL로의 정공주입장벽을 효과적으로 감소시키고 발광층 내에 전자와 정공의 균형을 최적화 시켜 외부양자효율이 10.8%에서 15.6%로, 전류 효율은 34.3 cd/A에서 42.7 cd/A로 소자 효율이 크게 향상 되었다.

• 한국정밀공학회지
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• 제16권5호통권98호
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• pp.83-90
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• 1999

The prevalence of microprocessor-based controllers in automotive system has greatly increased the need for tools which can be used to validate and test control system over their full range of operation. The objective of this paper is to develop a real time simulator of an anti-lock braking system and traction control system by the methodology of using hardware-in-the-loop simulation based on a personal computer. By use of this simulator, the analyses of commercial electronic control units and components for ABS/TCS were performed successfully. The simulator of this research can be applied to development of more advanced control system(such as vehicle dynamic control system) and other automotive system.