• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.433-437
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• 2005

The goal of our research is to develop a formal modeling methodology for supervisory and controlling systems that have artificially intelligent features. This approach is agent-based and central to the development of the model of mobility agent considering reactivity for real-time purpose and deliberation for optimal realization and safe-fail problems for critical systems like Intelligent Transportation Systems by high-level Petri net. By using nets within nets we investigate the concurrency of the system and the agent in one model without losing the needed abstraction, and synchronous channels are introduced to denote the coordination and communication. Finally an example is demonstrated.

• 전기전자학회논문지
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• 제13권3호
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• pp.87-94
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• 2009

TETRA(TErrestrial Trunked RAdio)는 국내 전력IT무선기간망에 적용된 ETSI(European Telecommunications Standards Institute)가 정한 디지털 주파수공용통신(TRS, Trunked Radio System) 기술로서 공중망 및 기간망에 적용되고 있는 무선통신시스템이다. IEC 61850은 SCADA(Supervisory Control And Data Acquisition) 시스템에서 SAS(Substation Automation System)를 위해 제안된 프로토콜이다. 본 논문에서는 리눅스 운영체제 기반의 IEC 61850 Server와 Client Simulator를 사용하였다. 또한 IEC 61850 Server Simulator와 Client Simulator 간의 TCP/IP 기반의 통신을 TETRA Packet Data Service 기반의 통신으로 변환하는 다기능 게이트웨이를 개발하여 TETRA 기반 IEC 61850 SCADA 시스템을 구축하였다.

• 제어로봇시스템학회논문지
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• 제6권6호
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• pp.478-485
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• 2000

A discrete event systems (DES) is a physical system that is discrete in time and state space, asynchronous (event rather than clock-driven), and in some sense generative(or nondeterministic). This paper presents the design of fifteen modular supervisors to control an experimental CIM testbed. These supervisors are nonblocking, controllable and nonconflicting. After verification of the supervisors by simulation, the supervisors for AGV system have been implemented to demonstrate their efficacy.

• 조명전기설비학회논문지
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• 제21권9호
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• pp.95-100
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• 2007

The importance of communication security is increased in the power industry. The representative communication network of power industry is the SCADA(Supervisory Control and Data Acquisition) systems. The SCADA system has been used for remote measurement and control in the power industry. Recently, many studies of SCADA network security have been carried out around the world. In this paper, we introduce recent security issues in the SCADA network and propose the application of a symmetric encryption method to the Korea SCADA network.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국내학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.975-980
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• 1993

In accordance with increase, if electronic power demanded, more efficient supervisory control of distribution system will be required. This study contains development of MMI(man-machine-interface) system with GUI(graphic-user-interface), for the automatic power distribution system. The main function of MMI system is to edit network of power distribution and to management of data base for network. The GUI function of MMI system enables more efficient management of power distribution system.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1996년도 추계학술대회 학술발표 논문집
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• pp.172-175
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• 1996

In the paper is proposed a hierarchical self-learning fuzzy controller for balancing and position control of an circular inverted pendulum system. To stabilize the pendulum at a specified position, the hierarchical fuzzy controller consists of a supervisory controller, a self-learning fuzzy controller, and a forced disturbance generator. Simulation example shows the effectiveness of the proposed method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 A
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• pp.515-517
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• 1993

Dispatcher's Training simulation function are network analysis, power system modeling, supervisory control, and system security assessment. This function provides hand-on training for power dispatchers for operation of the nation control center in the future, it needs interface between simulator and expert system. This paper introduces DTS function which is adopted in the Central Load Dispatching Office.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.109-112
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• 1988

다각 보행로보트를 효율적으로 운용하기 위한 총괄적인 관리제어 시스템이 설계되었다. 운영체제인 XINU를 시스템내의 프로세서간의 통신 및 작업 스케쥴링을 효휼적으로 하기위해 채용하였다. 보행로보트의 제어프로그램이 개발되었으며, 1각의 기구 모형에 대한 실험이 수행되었다.

• Journal of Advanced Marine Engineering and Technology
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• 제28권5호
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• pp.811-817
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• 2004

Recently embedded systems are widely used in various industrial fields as supervisory controller because they have many merits. One of merits seems to be that operating environment of embedded system is the same as development environment using PC. That makes developing and manufacturing period shorten and also proper time to market Most of all machinery have sequential control system for their maneuvering which is composed of relays. contacts. timers. etc. In this paper. software sequential control system is proposed to be able to replace hardware sequential control system by using embedded system A lot of merits by the software sequential control system can be expected in the respect of economic reproduction, intelligent technologies and utilities, And porting of LINUX operating system to embedded system is carried out and device drivers and interface boards for LINUX 05 are designed for controlling air compressor by software Internet remote control and monitoring system of air compressor is implemented with Java script and CGI for these purposes. The experiment for operating air compressor system is taken through internet networks. The results show that developed system can be used for real plant.

• 한국지능시스템학회논문지
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• 제19권3호
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• pp.398-403
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• 2009

최근 물류산업에 가장 중요한 부분인 컨테이너의 내부를 모니터링하여 보다 나은 물류시스템을 구현하고자 하는 노력이 많이 전개되고 있다. 본 논문에서는 지능형 컨테이너 시스템과 퍼지 논리를 이용하여 컨테이너 내부 상황을 인식하고 위험 상황을 판단할 수 있는 정보처리 시스템을 구현하였다. 지능형 컨테이너 시스템의 경우 모형 컨테이너에 ZigBee 노드를 부착하여 컨테이너 내부의 상태를 무선 환경에서 모니터링 할 수 있게 하였다. 또한 컨테이너 내부 상태에 대한 많은 데이터를 분석하여 내부 상황을 인식하고 위험 상황을 예측할 수 있는 정보처리 시스템을 퍼지 논리와 SCADA(Supervisory Control and Data Acquisition) 시스템인 InTouch를 이용하여 구현하였다.