• 제어로봇시스템학회:학술대회논문집
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• 1988.10a
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• pp.374-379
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• 1988

We propose a framework for modelling and operation management of robotic assembly cells via knowledge base. In the framework, each component of the cell is considered as a state variable, the relations among the state variables are stored in state transition maps(STMs) and then transformed into the form of knowledge. The assembly job tree(AJT) which includes the precedence relations and the constraints for assembly tasks is also described. Finally, an algorithm is presented to manage the cell operation.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2012.05a
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• pp.135-135
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• 2012

세계 환경유해물질 규제에 대응하여 반도체 substrate의 Pb-free solution의 일환으로 등장한 PPF (Pre-Plated Frame)는 패키지공정 조립성은 물론, 자동차 반도체와 같은 고 신뢰성 및 low cost 요구를 만족하기 위해 초박막 고품질의 도금층과 Sub-micro scale의 rough treatment 와 같은 미세 표면제어 기술, 그리고 Au wire로부터 Cu wire 로의 전환에 대응하는 최적화된 도금층 구조로 발전하고 있다. 이러한 기술적인 진화를 거듭해온 이 기술은 다양한 반도체 substrate에 광범위하게 사용될 수 있기 때문에 향후 PPF기술의 활용저변은 더욱 확대될 전망이다.

• KEPCO Journal on Electric Power and Energy
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• v.7 no.1
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• pp.59-62
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• 2021

관형지지물은 단일 강관 기둥 형태의 송전탑으로 강관은 상하 여러 개의 프레임으로 분할되어 플랜지부에서 볼트로 체결된다. 신설 송전선로 관형지지물 플랜지 연결부에서 가압전 조립 볼트 절손이 발견됨에 따라 강관도괴방지 대책 수립을 위한 손상원인분석 기술지원을 수행하였다. 본 건에 대해 파손면·균열 분석 기술을 통해 제작과정 상의 문제가 있었음을 확인하였다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.35 no.12
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• pp.1129-1134
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• 2007

Payload fairing protects satellites and electrical equipments from the external environment. Payload fairing is jettisoned before satellite separation. Assembly frame for the separation of payload fairing were assembled with shear bolts. The role of shear bolts is to support structural load during flight and they are cut by explosion of pyro. The assembly frame which is connected by shear bolts is separated after the cutting of shear bolts. In this paper, structural tests and analysis were done for the design of the shear bolt. Compression, bending and shear load apply to the hardware including assembly frame. Test results showed that design of the shear bolt satisfied both structural strength for the support of flight load and required low strength for the cutting of shear bolts.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.10
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• pp.5906-5911
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• 2014

Currently, there are many processes of package assembly and inspections of real fields that examine whether a manufactured semiconductor can be operated regularly and can endure low humidity or high temperatures. As the inspection equipment of a semiconductor test handler picker has been used at the inspection process, these inspection equipment frames were modelled in 3D and these models were analyzed using 3 kinds of fatigue loadings. As the analysis result, maximum deformation occurred at the midparts of the frames at cases 1 and 2. Among the cases of nonuniform fatigue loads, the 'SAE bracket history' with the severest change in load became the most unstable but the 'Sample history' became the most stable. Fatigue analysis result can be used effectively with the design of an inspecting equipment frame of a semiconductor test handler picker to examine the prevention and durability against damage.

• Journal of Internet Computing and Services
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• v.4 no.1
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• pp.67-74
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• 2003

According to change of software development technique as design pattern, component based development etc.., web server development part is applied activity to fit in various user requirement. Especially, EJB as sewer side component model much researches and introduce by easy and various development support. Also, component composing techniques is receiving many interests by easy and efficient application way that architecture based C2 style architecture with message handling. But, in case of EJB component that can not cail thread, C2 framework modification is unavoidable for component composition by C2 style architeccture. For this, we propose techniques to use Adapter pattern to be one of structure pattern among pattern. That is, did so that component composition by C2 style architecture may can consist changing to be able to call thread function in EJB by Adapter pattern.

• Journal of Internet Computing and Services
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• v.7 no.2
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• pp.81-92
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• 2006

Recently, the number of mobile phone and PDA users has been rapidly increased. Such monitoring and control applications as geographical and traffic information systems are being used widely with wireless devices. In this paper, we introduce the mobile M/VC application framework that supports the rapid constructions of mobile monitoring and control (M/VC) applications. The mobile M/VC application framework uses the mobile Observer/Observable pattern that extends the Java's Observer/Observable for automatic interactions of server and client objects in wireless environments. It also provides the Multiplexer and Demultiplexer classes that supports the assembly feature of Observer and Observable objects. To construct an application using the framework, developers just need to create necessary objects from the Observable and MobileObserver classes and inter-connect them structurally(like the plug-and-play style) through the Multiplexer and Demultiplexer objects. Then, the state change of Observable objects is notified to the connected Observer objects and user's input with Observer objects is propagated to Observable objects. These mechanism is the main process for monitoring and control applications. Therefore, the mobile M/VC application framework can improve the productivity of mobile applications and enhance the reusability of such components as Observer and Observable objects in wireless environments.

• The Journal of Korean Institute for Practical Engineering Education
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• v.2 no.1
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• pp.89-94
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• 2010

This paper proposes an educational robot game framework for novice students in k-12 to learn concepts of programming through interesting experiences. It is designed to be able to enjoy robot games without technical knowledge of robotics and programming. For this, in the proposed robot game framework, educational robots based on line-tracer are used and the programming APls that can be used for various educational programming languages are offered. And the proposed robot game framework also offers a game board to create several games with easy operations. Additionally, through experiments, it shows that novice students are able to create different games that have several game solutions for various programming using this robot game framework.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04c
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• pp.118-120
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• 2003

컴포넌트 기반 개발 방법은 조립 가능한 컴포넌트들을 이용하여 소프트웨어를 구현하는 기술로써, 소프트웨어의 생산성 및 품질을 높이는 효과적인 방법으로 알려져 있다. 향후 성장이 예상되는 컴포넌트 시장에서는 여러 컴포넌트 공급자들에 의해 COTS나 Web Services의 형태로 동일 내지는 유사 기능을 수행하는 대체 가능한 컴포넌트들이 나타나게 될 것이다. 개발되는 컴포넌트 기반 소프트웨어의 품질을 위해서는 여러 경쟁 컴포넌트들 중에서 우수한 성능을 가진 컴포넌트를 선택하는 기술이 중요한 요소의 하나라고 할 수 있다. 일반적으로 컴포넌트는 컴포넌트 모델에 종속적이기 때문에 컴포넌트의 성능 측정기도 측정 대상 컴포넌트뿐만 아니라 컴포넌트 모델에 종속적으로 구현된다. 본 논문은 컴포넌트 모델과 미들웨어 프레임워크에 중립적인 분산 컴포넌트의 성능 측정 모델에 대하여 설명한다. 이 모델을 이용하여 컴포넌트 모델에 중립 적인 성능측정기를 개발할 수 있으며 컴포넌트의 비교와 검증에 필요한 객관적인 성능 측정 결과를 얻을 수 있다.

• Journal of the Korean Society for Precision Engineering
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• v.29 no.5
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• pp.538-544
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• 2012

In this paper, design optimization of C-frame of a precision drilling and autorivet machine has been performed. The machine, Autoriveter has been developed by Korea Aerospace Industry (KAI), For current autoriveter, it is hard to achieve high efficiency because of heavy weight of the machine. In this paper, we suggest new structure of the current C-frame, a part of autoriveter, by optimization. The result of the study can give much profit for mass-production of the machine.