• 정보저장시스템학회논문집
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• 제3권1호
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• pp.13-16
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• 2007

The purpose of this paper is real time tilt servo control of the holographic data storage system. Holographic data storage device is a next generation data storage device with high storage density, high transfer rate and short access time. This device is very sensitive to a disturbance due to the enormous storage density. As to the recording material changed disc type, the media continuously vibrates as the disc rotates. When disc rotates, deviation, eccentricity and unbalance disturbance are occurred. This disturbances cause disc tilt, finally reference beam does not illuminates to correct incidence angle. Therefore real time tilt servo control is essential. In this paper, the algorithm is proposed to make real time tilt detection in angle multiplexing of the holographic data storage system with an additional servo beam and the experiments are performed.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권5호
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• pp.344-350
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• 2004

This paper proposes the train control system for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the train control monitoring system(TCMS) and ATC. Drive type of train control system car can drive with driverless mode basically, and this paper applied special communication type for car control, data analysis, the propulsion efforts and breaking effort can control the cars. It is used vector control in propulsion control and proposed operating pattern for propulsion control thinking operating data of rubber tire LRT.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.382-387
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• 2003

This paper proposes the Train Control System for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System(TCMS) and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied 10Mbps special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 동력기계공학회지
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• 제22권1호
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• pp.18-24
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• 2018

This paper focuses on systematic design about the membership ranges of the main design factors such as control error, control error rate, and sampling time for the fuzzy logic control of the variable speed drive refrigeration cycle. The upper and the lowest limit of the membership ranges are set up from the data of static characteristics obtained by experiments. Three kinds of membership ranges on the control error and the control error rate are tested by experiments. Especially, an effect of sampling time on control performance is also investigated in the same way. Experimental data showed the control error rate and the sampling time strongly effected on the control performance of the refrigeration cycle with a variable speed drive.

• 한국철도학회논문집
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• 제6권1호
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• pp.49-57
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• 2003

This paper proposes the Train Control System for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System(TCMS) and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied 10Mbps special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 제어로봇시스템학회논문지
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• 제12권5호
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• pp.419-424
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• 2006

In this study, a thermal control system which applied a Peltier device for the polymerase chain reaction(PCR) machine is to be designed. Here in order for it to easily follow the characteristics of the thermal cycle existing for gene amplification of the PCR sample, a PCR control board utilizing a thermal sensor, a Peltier, and a 8 bit microprocessor is made up. Especially a fuzzy type PD control algorithm is applied periodically in time response, and control system is implemented. For that matter, the characteristic data of subject system is obtained and analysed to begin with. Based on this analysed data, the proposed control algorithm is applied and an evaluation of the performance of the whole system take place through the PC.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.223-229
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• 2003

This paper proposes the Train control system for the LRT(light rail transit}. With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 응용통계연구
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• 제35권2호
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• pp.203-215
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• 2022

본 논문에서는 연속적으로 관측되는 개별 관측치에 대하여, 모평균의 변화를 모니터링하는 데 적용 가능한 관리도에 대하여 고찰해 보고자 한다. 가장 대표적인 관리도로 슈하르트의 X 관리도, 지수가중이동평균 관리도와 이들의 결합관리도에 관하여 살펴보고 모의실험을 통하여 각 관리도의 성능을 비교 평가해 보고자 한다. 또한, 실제 자료분석을 통해 실질적인 문제에서 관리도를 어떻게 사용해야 하는지 알아보고, 각 관리도의 문제점에 대하여 살펴보기로 한다.

• Journal of Platform Technology
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• 제12권2호
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• pp.45-57
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• 2024

스마트 시티는 정보통신기술의 혁신과 도시 생활의 질 향상을 추구하는 현대 도시 계획의 산물이다. 스마트 시티의 효율적인 운영을 위해서는 실시간 수집되고 저장 및 처리되는 데이터가 핵심자원이다. 따라서 다양한 분야에서 수집되는 스마트 시티의 데이터는 안전하게 관리되어야 하며, 개인정보보호가 무엇보다 중요하다. 본 연구에서는 스마트 시티의 데이터를 안전하게 관리하기 위하여 블록체인 기술을 이용한 스마트 시티 데이터 보안 모델을 제안하였다. 제안 모델은 블록체인 네트워크에 IPFS를 통합하여 데이터를 분산 저장함으로써 데이터의 기밀성과 무결성을 확보하고, CP-ABE를 이용하여 데이터를 암호화하여 사용자로부터 데이터의 접근제어가 효율적으로 수행되도록 하였다. 또한 데이터 접근 제어 정책과 동형 암호를 사용함으로써 데이터의 활용성을 강화하면서 프라이버시를 보장하도록 하였다.

• Smart Structures and Systems
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• 제11권3호
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• pp.261-282
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• 2013

Structural health monitoring (SHM) is an application area of Wireless Sensor Networks (WSNs) which usually needs high data communication rate to transfer a large amount of monitoring data. Traditional sink node can only process data from one communication channel at the same time because of the single radio chip structure. The sink node constitutes a bottleneck for constructing a high data rate SHM application giving rise to a long data transfer time. Multi-channel communication has been proved to be an efficient method to improve the data throughput by enabling parallel transmissions among different frequency channels. This paper proposes an 8-radio integrated sink node design method based on Field Programmable Gate Array (FPGA) and the time synchronization mechanism for the multi-channel network based on the proposed sink node. Three experiments have been performed to evaluate the data transfer ability of the developed multi-radio sink node and the performance of the time synchronization mechanism. A high data throughput of 1020Kbps of the developed sink node has been proved by experiments using IEEE.805.15.4.