• Journal of Institute of Control, Robotics and Systems
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• v.6 no.5
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• pp.415-425
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• 2000

An open architecture manufacturing strategy intends to integrate manufacturing components on a single platform so that a particular component can be easily added and/or replaced. Therefore, the control scheme based upon the open architecture concept is hardware-independent. In this paper, a modular and object oriented approach for a PC-based open robot control system is investigated. A standard reference model for robot systems, which consists of three modules; hardware module, operating system module, and application software module, is first proposed. Then, a PC-based Open Robot Controller(PC-ORC), which can reconfigure robot control systems in various production environments, is developed. The PC-ORC is built upon the object-oriented method, and allows an easy implementation and modification of various modules. The PC-ORC consists of basic softwares, application objects, and additional hardware device on the PC Platform. The application objects are: sequencer, computation unit, servo control, ancillary equipment, external sensor control, and so on. In order to demonstrate the applicability of the PC-ORC, the proposed PC-ORC configuration is applied to an industrial SCARA robot system.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.11
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• pp.1689-1694
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• 2012

In this paper, we present a reconfigurable mobile platform (RMP) for user-specific applications. The RMP consists of a basic module and more than one extended module that offers specified functions to a portable platform based on the circumstances and purposes of the users. The extend module for specified purposes is connected to the basic module using a common interface that offers interoperability to the traditional interfaces. This paper gives the results of a survey to determine specifications of a reconfigurable mobile platform. Utilizing the results of the survey, we propose a prototype of the reconfigurable mobile platform to enable specialized functions. The design objective is to provide specialized functions required for user specific needs related to their age and physical condition. In addition, it can be used for mobile healthcare applications that are efficient in improving the user's health conditions by executing medical analysis and prescriptions.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1063-1068
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• 2008

A lens system of a camera module for mobile phones is comprised of the composition and design of various shapes of lens. To improve responses such as the modular transfer function (MTF), a lens system should always be constructed by considering uncertainty that can be caused by manufacturing and assembly error. In this study, tolerance optimization using the Latin Hypercube Sampling (LHS) technique is performed. In order to reduce the computational burden of the tolerance optimization process and decrease the influence from numerical noise effectively, we use the Progressive Quadratic Response Surface Modeling (PQRSM), which is one of Sequential Approximate Optimization (SAO) techniques. Using this method, we achieved optimal tolerance for each lens and obtained reliability for satisfying user‘s requirements. In addition, through the design process the manufacturing and assembly cost of a lens system was reduced.

• Journal of the Korean Society of Costume
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• v.57 no.4 s.113
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• pp.110-125
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• 2007

The purpose of this study is to analyze efforts of the mesa trends on the modern fashion design. For the study documentary research and qualitative content analysis have been carried out. Articles in magazines, seminar reports, and news related to trends were collected and analyzed to develop mega trends nowadays. As results, $2002{\sim}2006$ mega trends were extracted to Co-divergence, Emotional tech, Bi-dentity, Private+One and $2002{\sim}2006$ design trends extracted to Camouflage, Transformation, Modular system, Blur, Ease. The influences of mega trends and design trends on the modern fashion design have been proved. Those were expressed as eclectic style, deconstructionist style, reductive style and functionalist style in fashion design. The present era could be defined as cultural pluralism blended with various cultures and styles. Fashion as the essential display of contemporary culture and society has been successfully confirmed in this study.

• 한국전산유체공학회:학술대회논문집
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• 1998.05a
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• pp.75-81
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• 1998

A new advanced integral reactor of 330 MWt capacity named SMART(System-integrated Modular Advanced ReacTor) is currently under development at KAERI(Korea Atomic Energy Research Institute). One of the major design features of the integral reactor is locating the steam generators(SG) inside reactor vessel and eliminating the possibility of LB LOCA(large Break Loss of Coolant Accident). Orifices are fitted at the low part of steam generator cassette to stabilize and balance coolant flow distribution in the MCP (Main Circulation Pump) pressure header. A sensitivity analysis is conducted to determine the optimum orifice size using computer code 'CFX'.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.773-776
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• 2002

The battery charger of spacecraft has two different modes of operation respectively. One is the bus voltage regulation mode and the other is the charge current regulation mode. And also the battery discharger provide the power during eclipse mode of spacecraft. In this study, a test model of the battery charger and discharger using hi-directional converter are designed and analyzed. These Battery Charger and Discharger is introduced the modular converter method that can be added the converter modules according to the load variation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.15 no.5
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• pp.434-445
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• 1990

Protocol testing techniques are expanded from the traditional simple function- testing based on the OSI model, to sophisticated performance testing, conformance testing and interoperability testing. In addition, both point-to-point and point-to-multipoint protocols are to be covered. This paper presents a new multiple-purpose protocol test system where the common platform includes the test sequence generation and test result analysis, and the modular test execution part is selectively adjusted according to the test purposes and protocols under test. This paper describes test system for network routing protocol and test system for transport protocol, designed upon the ideas of the multiple-purpose protocol test system.

• Transactions of Materials Processing
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• v.13 no.2
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• pp.160-167
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• 2004

In order to theoretically analyze the creep behavior of high Cr steel at $600^{\circ}C$, a unified elasto-viscoplastic constitutive model based on the consideration of dislocation density is proposed. A combination of a kinetic equation describing the mechanical response of a material at a given microstructure in terms of dislocation glide and evolution equations for internal variables characterizing the microstructure provides the constitutive equations of the model. Microstructural features of the material such as the grain size and spacing between second phase particles are directly implemented in the constitutive equations. The internal variables are associated with the total dislocation density in a simple model. The model has a modular structure and can be adjusted to describe a creep behavior using the material parameters obtained from uniaxial tensile tests.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.629-630
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• 2006

This paper present a design experience of supervisory control system platform for agile and intelligent manufacturing(AIM). Embodied integrated environment that can do in place that do work direction, analysis command file generation, achievement using Petrinet-type Graphical Language(PGL) in proposed Supervisory Control System. Also, embodying whole system software in Modular done form, did to have extensity to fit in developer's requirement.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.456-457
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• 2018

본 논문에서는 MMC(Modular Multilevel Converter)용 Valve 시험회로의 설계를 위한 커패시터 값 선정에 대한 분석을 하고자 한다. 기존의 HVDC MMC용 Valve 시험회로는 전류를 선형적으로 증가시키고 감소시키기 때문에 적절한 전압과 전류를 공급할 커패시터와 인덕터의 설계가 중요하다. Valve 시험회로의 동작을 분석하고, 최적의 커패시터와 인덕터를 선정하여 각 서브모듈의 전압과 입력 전류의 오차를 낮추었으며 시뮬레이션을 통해 타당성을 검증하였다.