• The Transactions of the Korean Institute of Power Electronics
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• v.12 no.5
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• pp.386-393
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• 2007

Charge-pump high voltage inverter for Plasma backlight using CIM(Current Injection Method) is proposed in this paper. Adoption of ERC(Energy Recovery Circuit) is a new attempt in high voltage inverter so that it is not only energy recovery but also improvement of discharge stability and system unstability which is interrupted by noise. Using a charge-pump technique enables low voltage switches to be usable, the cost can be reduced. CIM is adopted to achieve high speed energy recovery in proposed circuit. Operations of the proposed circuit are analyzed for each mode. The proposed circuit is verified to be applicable on a 32 inch plasma backlight panel by experimental results.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2012.04a
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• pp.196-199
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• 2012

Generally the piezo-composites have superior hydrostatic response characteristics than PZT ceramics due to both the stress amplification effect in axial direction and stress reduction effects in radial direction. This paper described material properties of a 1-3 type piezo-composite that fabricated with ceramic injection molding (CIM) technology. The electro-mechanical performances of the composite have been analyzed using FEM and the physical properties of the composite have been measured with the vol. % of the PZT ceramics. Based on the results, the $k_t$ increased rapidly as the vol. % of the PZT ceramics increased up to 30 vol. % and saturated the constant value in the above region. Also the experimental results have good agreement with the simulation values of the composite. Finally we developed the composites having high piezoelectric properties than the PZT ceramics with the CIM technology.

• Korean Journal of Computational Design and Engineering
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• v.3 no.4
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• pp.251-259
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• 1998

Currently a hot potato in industries is to reduce the lifecycle of product and maximize the time-to-market benefits. A lot of methodologies and the concrete systems are in use for performing this function. One of these systems is that process are reconstructed by BPR and systems are implemented by PDM. First of all, th analyses of existing product, process and resource data must be preceded. New process is established on the basis of the analyzed information of a company and PDM implements the new process in the company. The consecutive activities like this provide the basic environment for CIM. However, the current system have been developed on the favor of a big company. There are many problems in applying it too a mid-sized company. A lot of function in a PDM tool is not necessary for the mid-sized CIM characteristic. The purpose of this study is to define the ROPP information model that is an appropriate information integration for a design process. The model shows an associated complicated information of a company effectively. Also the modeler makes it possible to manage consistently the constraints of design process on the basis of the analysis of dependency among each resource.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06b
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• pp.118-120
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• 2006

커뮤니티 컴퓨팅 시스템은 3단계 모델(CCM, CIM-PI, CIM-PS)로 이루어져 있다. 모델은 이 전의 모델을 기반으로 툴의 지원을 받아 코드를 상세화하면서 실제 구현단계에 이르게 된다. 3가지 모델 중 가장 먼저 기술해야 하는 CCM(Community Computing Model)은 커뮤니티 컴퓨팅 시스템에 대한 가장 놓은 수준의 추상화 모델로서, 시스템의 환경과 요구사항을 기술하는 부분이다. 기술된 CCM을 기반으로 생성되는 CIM-PI(Platform Independent Community Implementation Model)에서는 시스템의 구현을 고려하여 컴퓨팅 요소들과 또 이들 간에 생길 수 있는 협업관계를 자세히 기술한다. 이렇게 기술된 CIM-PI를 멀티에이전트 플랫폼 위에서 작동할 수 있도록 CDTK를 이용해 변환해 농은 것이 CIM-PS(Platform Specific Community Implementation Model)이다. 본 논문에서는 커뮤니티 컴퓨팅 시스템 개발을 더욱 쉽고 체계적으로 개발하기 위해 만든 CDTK와 이 개발 툴을 통해 얻을 수 있을 수 있었던 여러 장점들에 대해 소개한다. CDTK를 이용한 적용사례로 유비쿼터스 환경내에서 발생할 수 있는 가상시나리오에 적용하여 CDTK의 실현성과 효율성을 검증해 보았다.

• Journal of the Korean Society of Systems Engineering
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• v.17 no.1
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• pp.21-34
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• 2021

The use of Field-Programmable Gate Arrays (FPGAs) in the development of safety-related Human-Machine Interface (HMI) systems has gained much momentum in nuclear applications. Recently, one of the application areas for the Advanced Power Reactor 1400 (APR1400) is in the development of the advanced Component Interface Module (CIM) of the Engineered Safety Features Actuation System (ESFAS). Using systems engineering approach, we have developed a new FPGA-based advanced CIM software. The first step of our software development process involves the Preliminary Hazard Analysis (PHA) based on the previous CIM design. In this paper, we describe the qualitative approach used in performing the preliminary hazard analysis. The paper presents the methodology for applying a modified Hazard and Operability (HAZOP) procedure for the conduct of PHA which resulted in a qualitative risk-ranking scheme that informed the decisions for the safety criteria in the requirements specification phase. The qualitative approach provided the justification for design changes during the advanced CIM software development process.

• KEPCO Journal on Electric Power and Energy
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• v.8 no.2
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• pp.127-135
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• 2022

With the advent of high technologies such as the 4th Industrial Revolution and artificial intelligence and big data, efforts are being made to solve urban problems and improve the quality of life by applying new technologies in the smart city field. In addition, as carbon neutrality has emerged as an important issue due to global warming, smart city energy platform technologies such as urban energy management, efficiency improvement, and carbon reduction are in the spotlight. In order to effectively manage urban energy, energy resource information such as electricity, water, gas, hot water, heating, etc. must be collected from the management system of various energy utilities and managed on the central platform. The centrally integrated data is delivered to external city management systems that require city energy information through an energy platform. This study developed a CIM profile for smart city energy monitoring required to provide energy data to external systems. Electric data model were designed using the CIM class of IEC 61970, and water, gas, and heat data model were designed in compliance with the UML-based design ideas of IEC 61970.

• Journal of Institute of Control, Robotics and Systems
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• v.6 no.6
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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.

• Korean Management Science Review
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• v.11 no.2
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• pp.65-77
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• 1994

One of the major issues in the implementation and maintenance of CIM databases is the sharing and exchange of information among the heterogeneous databases. This paper addresses some architectural aspects for integrating the heterogeneous multi-databases using knowledge-based expert systems. we propose a loosely integrated coupling system between databases and knowledge-based expert systems. Especially we suggest the architectural aspects of such a coupling methodology. we also present the structure and knowledge representation scheme for the proposed knowledge-based expert system. A prototype example is included to illustrate the framework and its mechanism for implementation.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.799-803
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• 1991

This study proposes a CIM shell that is consisted with computers connected by a LAN. Since this system excludes production hardwares, physical movements of devices are represented by computer simulation. On the other hand, softwares that dictate system operation are real, and consu- me physical time. Thus the shell becomes half-real-half-simulation that requires events synchronization mechanism. This study shows the building procedure of such shell as well as an example of application of the shell.

• ICROS
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• v.1 no.2
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• pp.30-42
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• 1995

본 고에서는 요소기술 측면에서 DB 기술의 현황을 소개하고 CIM 응용사례를 기술한다. 2장에서는 DBMS의 일반적 기능과 데이타 모델의 발달에 따른 DBMS 기술의 발전에 대해 간략하게 기술하며, 3장에서는 최근 CIM, 멀티미디어 데이타 처리 분야에서의 비전통적인 DB 요구사항을 충족시키는 객체지향 소프트웨어 및 DB 패러다임에 대해 소개한다. 4장에서는 FMS의 운용 관리를 위한 객체지향 DB 구축사례에 대해 기술하며, 5장에서는 CALS에서 생산 데이타 교환 표준으로 채택하고 있는 ISO STEP 표준 DB구현 사례를 소개한다. 마지막으로 6장에서 결론을 기술한다.