• Title/Summary/Keyword: Digital Automation

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Study on the Supervisory Monitoring System for Substation Automation (변전소 자동화를 위한 상태감시 시스템에 관한 연구)

  • Lee, Heung-Jae;Lee, Eun-Jae
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.2
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    • pp.84-91
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    • 2014
  • This paper introduces the application of supervisory monitoring system for substation automation based on IEC 61850. The objective of proposed system is detection of such a malfunction or degradation of devices. The supervisory monitoring procedure consists of a two step - topology processor and state estimation. The topology processor using artificial intelligence is a preprocessing step of state estimation. Topology processor identifies the topology structure of switches in substation and detects an error of ON/OFF state data. The state estimation is an algorithm that minimizes an error between optimal estimation values and real values. The proposed system is applied to standard digital substation based on IEC 61850 for performance verification.

A Study on the Design of a Digital Controllor for the Low-cost Automation of a Cable Extruding System (간이 자동화에 의한 전선 압출공정의 디지털 제어기 설계에 관한 연구)

  • Kim, Yong-Deak
    • Journal of the Korean Society for Precision Engineering
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    • v.2 no.3
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    • pp.84-91
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    • 1985
  • This paper proposes the theory for the Low Cost Automation (LCA) as a intermediate process of the factory automation, where the SCA is new adaptation for the improving productivity without changing the current product lines. And also this paper deals with the case study for the predictable effects and technical method at the extruding cable lines. As the results, the implementation of the LCA theory could be acomplished saving materials and man power, improving reliability and productivity. For this facilities, it cost within 5% extra expense of a extruding cable line systems. And it could be refund in six months.

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Development of IEC 61850 Performance Testing Procedures of BUS Protection IED Using UML (UML을 이용한 모선보호 IED의 IEC 61850 성능시험 절차서 개발)

  • Lee, Nam-Ho;Jang, Byung-Tae
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.5
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    • pp.767-772
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    • 2008
  • Korea Electric Power Research Institute in charge of the power IT project "Development of Prototype for Advanced Substation Automation System based on the Digital Control Technology", is performing the verification of performance of the substation automation system. In order to verify a system based BUS protection IED, the standardized document and procedures are required. But there is nothing to describe systematically how to verify IEC 61850 based IED in the system environment except an individual IED testing way and report. This paper presents the substation automation system based ways and procedures to verify the IED using UML(Unified Modelling Language).

Bandwidth Allocation Scheme for Real-Time Communication on MS/TP Protocol (MS/TP 프로토콜에서 실시간 통신을 위한 대역폭 할당 기법)

  • Song, Won-Seok;Hong, Seung Ho
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.11
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    • pp.660-668
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    • 2005
  • Digital communication networks have become a core technology in advanced building automation systems. BACnet (Building Automation and Control networks) is a standard data communication protocol designed specifically for building automation and control systems. BACnet adopts Master-Slave/Token-Passing (MS/TP) protocol as one of its field level networks. Tn this study, we introduce a method of implementing bandwidth allocation scheme in the MS/TP protocol. The bandwidth allocation scheme improves the capability of real-time communication of the original MS/TP protocol. The bandwidth allocation scheme introduced in this paper can be easily implemented in the existing MS/TP protocol with a slight modification. In this study, we examined the validity of bandwidth allocation scheme using simulation models. The results from the simulation experiment show that the proposed scheme satisfies the requirements of real-time communication.

Implementation of Embedded Web Server and XML Web Services for Intelligent Building System (지능형 빌딩 시스템을 위한 임베디드 웹 서버와 XML 웹 서비스의 구현)

  • Kim, Tae-Kook;Chang, Hyeong-Jun;Park, Gwi-Tae
    • Journal of Institute of Control, Robotics and Systems
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    • v.13 no.12
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    • pp.1167-1172
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    • 2007
  • The existing building control and automation systems which have been applied to buildings are provided by many different vendors and each vendor has its own proprietary protocol. There are many problems in system integration since those building control and automation systems belong to each vendor. Also, the problems of cost and space increase, due to the usage of personal computers as the control servers of DDC(Direct Digital Control) in each facility. Those problems mentioned above can be effectively resolved by using XML Web Services and Embedded Web Server. Embedded Web Server and XML Web Services are technologies emerging out of the IT industries and there are many researches to apply them into many fields. In this paper, Embedded Web Server and XML Web Services are proposed to be used in building control and automation system to resolve problems in building system integration.

Development of Automatic Gear Modeling Module Using Computer Aided Design(CAD) (컴퓨터응용설계(CAD)를 이용한 기어모델링 자동화 모듈 개발)

  • Kim, Dae-Ho
    • Journal of the Korean Society of Mechanical Technology
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    • v.20 no.6
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    • pp.803-808
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    • 2018
  • Combining digital automation solutions throughout recent manufacturing process is essential. Advanced robot and mechanical techniques are required for design, manufacture, and distribution process. Manual design of repetitive similar mechanical components during the development phase of these advanced machines and robots can occur wasting time and money. Developed gear design module, which is the power transfer system mechanical component, was programmed in the Visual Basic language in CATIA V5 environment. Automation Process is Based on Parametric Modeling Method. and it was found to be effective in reducing design time compared to designers manual modeling.

Machine learning-based design automation of CMOS analog circuits using SCA-mGWO algorithm

  • Vijaya Babu, E;Syamala, Y
    • ETRI Journal
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    • v.44 no.5
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    • pp.837-848
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    • 2022
  • Analog circuit design is comparatively more complex than its digital counterpart due to its nonlinearity and low level of abstraction. This study proposes a novel low-level hybrid of the sine-cosine algorithm (SCA) and modified grey-wolf optimization (mGWO) algorithm for machine learning-based design automation of CMOS analog circuits using an all-CMOS voltage reference circuit in 40-nm standard process. The optimization algorithm's efficiency is further tested using classical functions, showing that it outperforms other competing algorithms. The objective of the optimization is to minimize the variation and power usage, while satisfying all the design limitations. Through the interchange of scripts for information exchange between two environments, the SCA-mGWO algorithm is implemented and simultaneously simulated. The results show the robustness of analog circuit design generated using the SCA-mGWO algorithm, over various corners, resulting in a percentage variation of 0.85%. Monte Carlo analysis is also performed on the presented analog circuit for output voltage and percentage variation resulting in significantly low mean and standard deviation.

Development of Evidence Analysis Tool based on Active Data for Digital Forensics (디지털 포렌식을 위한 활성데이터 기반 증거분석도구 개발)

  • Lee, Jun-Yeon
    • Journal of Digital Convergence
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    • v.10 no.3
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    • pp.99-104
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    • 2012
  • The digital forensics are new kinds of security that investigate and verificate fact relation about activities based on digital data. In this paper, we implemented digital forensic tool that can be used in collecting, analyzing, and reporting evidences. This tool support intuitional GUI that everybody can analyze easily. And a simple operation can collect and analyze active data. Also, we can decrease much time and endeavor by using this forensic tool that support reliable data.

A Realization of Digital Convergence Platform based on MPEG-21 Multimedia Framework (MPEG-21 멀티미디어 프레임워크에 기반한 디지털 컨버젼스 플랫폼 구현에 관한 연구)

  • Oh, Hwa-Yong;Lee, Eun-Seo;Kim, Dong-Hwan;Chang, Tae-Gyu
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.227-229
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    • 2005
  • This paper proposes a method of implementation of digital convergence platform(DCP) which enable the service of broadcasting, communication, multimedia and home automation. Also digital convergence platform based on MPEG-21 multimedia framework can be a model to provide a distributed electronic commerce environment of multimedia and to manage of it. Platform hardware is implemented using a general purpose CPU and high performance digital signal processor and has peripheral units for network and multi I/O. It is able to run applications of multimedia which has variable formats on DSP. In addition, a personal transaction of multimedia packaged with MPEG-21 multimedia framework is provided on digital convergence platform. Like this, digital convergence platform bring up a new architecture of multimedia systems using a new generation network.

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Digital Transformation in the Restaurant Industry: Current Developments and Implications

  • Alt, Rainer
    • Journal of Smart Tourism
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    • v.1 no.1
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    • pp.69-74
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    • 2021
  • Restaurants are an important area of the hospitality industry. This industry sector has not only experienced severe consequences of the recent lockdowns, but it has also seen the rise of digital technologies. As known from other industries, the digital transformation impacts products, processes and business models alike. Starting from the classical distinction of a restaurant's front- and back-of-the-house processes, this paper presents an overview on current developments in the restaurant industry and based on an analysis of current digital services, it derives some implications for future directions. Among the observations are that restaurants need to cover more touch points, provide more individualized offerings and strive for more automation as well as integration of their systems.