• 해양환경안전학회지
• /
• 제13권3호
• /
• pp.229-234
• /
• 2007

현재 근해어업은 기피 산업으로 어민들의 고령화 및 감소로 인력을 구하기 어렵고 어로활동을 하기 위해서는 일반적으로 2명 이상이 1조로 작업이 진행된다. 따라서 숙련되지 못한 사람들이 조를 이루어 작업을 할 경우 의사전달에 시차가 생기고 한사람은 배의 조종에 매달리므로 작업의 능률이 떨어진다. 따라서 레저나 소형어선에서 1인이 선박을 조종하면서 작업이나 레저를 즐길 수 있는 선외기의 원격제어 시스템 연구의 필요성이 대두되었다. 본 연구에서는 작업의 효율을 높이고 인력을 절감 할 수 있는 선외기의 원격제어시스템에 관한 연구를 수행하였다. 선외기는 엔진, 조타기, 정 역전 및 중립 기어박스가 하나의 시스템으로 구성되어 있다. 소형 선외기에 이 세 가지의 제어를 직류전동기를 이용하여 위치제어와 속도제어를 하였고, 마이크로컨트롤러를 이용하여 조타기와 엔진회전수 제어를 프로그램화 하여 어민들이 작업을 하면서 동시에 원하는 조종을 할 수 있도록 시스템을 설계 제작하였다. 시운전결과 전속에서 좌 우현 조타 성능이 명령대로 잘 움직였다.

• 한국지능시스템학회논문지
• /
• 제24권5호
• /
• pp.489-494
• /
• 2014

본 논문에서는 무인차량용 다중채널 무선원격 제어시스템의 설계방안을 제안한다. 기존의 무선원격 제어시스템은 단일 제어채널로 구성되어 제어채널에 고장이 발생하였을 때 응급대처가 불가능한 문제점이 있다. 따라서 휴대용 무선원격 제어기와 스테이션용 무선원격 제어로 구성되는 다중채널 무선원격시스템을 제안한다. 무인차량용 다중채널 무선원격 제어시스템을 개발하기 위하여 휴대용 무선원격 제어기와 휴대용 무선원격 제어기를 설계 및 개발하였다. 개발한 무선원격 제어시스템의 성능을 확인하기 위하여 무인차량에 적용하여 주행 실험을 실시하였다. 무선원격제어기의 고장 시 휴대용 무선원격제어기를 이용한 비상정지 실험과 휴대용 무선원격제어기의 고장 시 스테이션용 원격제어시스템을 이용한 비상정지 실험을 실시한 결과 모두 만족하는 비상정지 성능을 발휘함을 검증하였다.

• 유공압시스템학회:학술대회논문집
• /
• 유공압시스템학회 2010년도 춘계학술대회
• /
• pp.62-65
• /
• 2010

Field robot represented by excavator can be applied for various working in manufacturing, construction, agriculture etc. Because of the flexibility of its multi-joint mechanism and the high power of hydraulic actuators. Since the excavator operates in the hazardous working circumstance, operators exposed in harmful environment. Therefore, automation system has been investigated to protect from the harmful environment. In this paper, the method to construct the remote control system is proposed. The remote control system is consisted of a manual and auto mode. Manual mode controls a hydraulic cylinder as open loop control. and auto mode controls the end effecter of excavator using tracking control system. The efficiency of remote control system was evaluated through the field test.

• 대한전기학회논문지:전력기술부문A
• /
• 제54권4호
• /
• pp.185-192
• /
• 2005

This paper proposes a DRMS(Distribution Remote Management System) which can enhance highly the economics of automatic metering system and the power quality supplied to the electric customer improving the efficiency of the meter reading, voltage management and load management work by realizing the remote meter reading, the remote voltage management and the remote load management based on the ADWHM(Advanced Digital Watt Hour Meter). The DRMS is designed so that the voltage management and load management work in remote site can be processed by collecting the voltage pattern and current pattern as well as watt hour data from all ADWHMs one time every month regularly or from special ADWHMS several time irregularly, A new on-line voltage and load management strategy based on the ADWHM is designed by analyzing the existing voltage management and load management process. Also, DRMS is designed so that watt-hour data, voltage pattern data, load pattern data and power factor data can be collected selectively according to the selection of user to assist effectively the methodology. Remote management program and database of the DRMS are implemented based on Visual C++, MFC and database library of MS. Also, DRMS is designed so as to communicate with the ADWHM using RS232C-TCP/IP converter and ADSL. The effectiveness of the remote metering function is proven by collecting and analyzing the data after ADWHMs installed in any site. The developed strategy and program also is verified through the simulation of voltage management and load management.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2003년도 ICCAS
• /
• pp.2467-2470
• /
• 2003

In this paper, fault tolerant mechanisms are presented for a servo manipulator system designed to operate in a hot cell. A hot cell is a sealed and shielded room to handle radioactive materials, and it is dangerous for people to work in the hot cell. So, remote operations are necessary to handle radioactive materials in the hot cell. KAERI has developed a servo manipulator system to perform such remote operations. However, since electric components such as servo motors are weak to radiations, fault tolerant mechanisms have to be considered. For fault tolerance of the servo manipulator system, hardware and software redundancy have been considered. In case of hardware, radioactive resistant electric components such as cables and connectors have been adopted and motors driving a transport have been duplicated. In case of software, a reconfiguration algorithm accommodating one motor's failure has been developed. The algorithm uses redundant axis to recover the end effector's motion in spite of one motor's failure.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.804-809
• /
• 2002

Remote sensing division of satellite technology research center (SaTReC), Korea advanced institute of science and technology (KAIST) has developed a ground receiving and processing system for high resolution satellite images. Developed system will be adapted and operated to receive, process and distributes images acquired from of the second Korean Multi-purpose Satellite (KOMPSAT-2), which will be launched in 2004. This project had initiated to develop and Koreanize the state-of-the-art technologies related to the ground receiving system fur high resolution remote sensing images, which range from direct ingestion of image data to the distribution of products through precise image correction. During four years development, the system has been verified in various ways including real operation of custom-made systems such as a prototype system for SPOT and a commercialised system for KOMPSAT-1. Currently the system is under customisation for installation at KOMPSAT-2 ground station. In this paper, we present accomplished work and future work.

• 한국정보시스템학회지:정보시스템연구
• /
• 제2권
• /
• pp.194-206
• /
• 1993

Intelligent remote learning system is a system that incorporate communication technology and others : a database engine, an intelligent tutorial system. Learners can study by themselves through the intelligent tutorial system. The existence of a communication, database and artificial intelligence enhance the capability of IRLS. According to Parsaye, an intelligent databases should have the following features : 1) Knowledge discovery. 2) Data integrity and quality control. 3) Hypermedia management. 4) Data presentation and display. 5) Decision support and scenario analysis. 6) Data format management. 7) Intelligent system design tools. I hope that this research of framework for IRLS paves for the future research. As mentioned in the above, the future work will include an intelligent database, self-learning mechanism using neural network.

• 한국도로학회논문집
• /
• 제14권6호
• /
• pp.57-65
• /
• 2012

PURPOSES : Efficiency Improvement of a public road construction project management work using the development of a real-time remote site monitoring system METHODS : In this study, we developed the remote site monitoring system using a web camera for road construction projects in the RCMA(Regional Construction Management Administration). We can be monitored a construction progress and a weak point of the situation in real time using this. To achieve this, we tested about 10 road construction projects ordered by RCMA. Then, we verified a applicability for the site monitoring system in future. RESULTS : Take advantage of the remote site monitoring system consists of the Construction CALS System, one of the business systems used in the part of the MLTM(Ministry of Land, Transport and Maritime Affairs) institution-agencies. Was configured to be served through the "Construction CALS System" of "Construction Management System(Contractors)" and the "Construction CALS Portal System". Through this, Benefit analysis through a pilot application of the 10 road construction sites and developing considerations and "Guide for visual information processing equipment installation-operating in construction sites"are presented. CONCLUSIONS : Through the establishment of remote site monitoring system can improve the efficiency of construction management services. In addition, Various disasters and calamities, accidents and illegal construction will be prevented in advance is expected. This is expected to further improve the quality of the facilities.

• 한국정밀공학회지
• /
• 제18권5호
• /
• pp.120-129
• /
• 2001

As many sensors and actuators are used in many automated systems, various industrial networks are adopted for real-time distributed control. In order to take advantages of the networking, however, the network implementation should be carefully designed to satisfy real-time requirements considering network delays. This paper presents the implementation of a remote feedback control system via Profibus-DP net work for real-time distributed control More specifically, the effect of the network delay on the control performance evaluated on Profibus-DP testbed. Also, the traditional PID gain tuning methods are used to demonstrate the feasibility of the remote feedback control.

• Nuclear Engineering and Technology
• /
• 제35권3호
• /
• pp.243-250
• /
• 2003

Nuclear power plants (NPPs) will be highly connected network enabled systems in the future. Using the network and web enabled tools, NPPs will be remotely monitored by operators at any time from any place connected to the network via a general web browser. However, there will be two major issues associated with this implementation. The first is the security issue. Only the authorized persons need to be allowed to access the plant since NPP is a safety-critical system. However, the web technology is open to the public. The second is the network disturbance issue. If operators can not access the plant due to network disturbances, the plant will come into the out-of-control situation. Therefore, in this work, we performed a conceptual design of a web-based remote monitoring and control system (RMCS) considering these issues.