分散制御 시스템에서 開放化 構造說計

김내진,김진태,최진석 건국대학교 1996 대학원 학술논문집 Vol.43 No.-

최근 각종 제어시스템에 분산제어 시스템을 이용하는 경우가 늘고 있는데, 각 플랫폼에 따른 호환성 결여로 인하여 여러 가지 문제가 야기되고 있다. 본 논문에서는 이러한 어려움을 극복하기 위하여 사용 환경에 관계없이 각 분산제어 시스템을 연결하고자 개방구조를 설계하였다. 이를 위하여 OSI 7 layer model을 따른 protocal을 개발하였으며, 이것을 RPC와 XDR을 이용하여 구현하였다. 전체 시스템은 속도와 호환성을 모두 고려하였지만, 속도와 호환성이 모두 문제가 되는 것은 호환성을 위주로 설계하였다. Recently, many kind of control system is implemented by DCS(Distributed Control System). But that situation the compatible problem between different flatform system is arised. In this paper, we are about to describe the design of the system that makes a user to satisfy scalability, portablility, interoperability which is the characteristic of the open structure in DCS using real time control theory and microprocessor applicable technique. For this, we developed a protocal that followed OSI 7 layer model, and implemented this protocol using RPC and XDR. The system is considered the speed and the compatibility, but in the case of some problems in compatibility and speed, out design is intented to choose compatibility.

세로방향의 휜이달린 환형관 내의 유체흐름에 대한 연구

류진형,정인권,김정식,김내현 國立金烏工科大學校附設生産技術硏究所 1993 産業技術開發硏究 Vol.9 No.-

In this study, the pressure drop and velocity profile were measured in longitudinally finned annulus. The test specimens were a round rod of 38㎜diameter with no fin, a rod a 40㎜ with 6 fin, a rod of 40㎜ with 8 fin, and a rod of 50㎜ with 8 fin. The fin thickness was 3㎜ and the fin height was 5㎜. The specimen was installed in a tube of 76㎜ inner diameter. For the round rod with no fin, the pressure drop data were well predicted by Blasius correlation, and the velocity profile was very close to the Nikuradse's non-dimensional velocity profile. For finned rods, the pressure drop of 8 fin rods was well predicted by Blasiue correlation. However, the correlation slightly under-predicted 6 fin data. The maximum velocity points in the finned annulus were circumferentially uniform except for the fin top position. Quarmby's equation [Eq.14] predicted the maximum velocity points excellently.

국내 종합병원 병동부의 리모델링 수행전략에 관한 연구

김하진,양내원 대한건축학회 2003 대한건축학회논문집 Vol.19 No.3

As hospitals change continuously and rapidly, the way of growth and change becomes another important factor in the design of a hospital. The hospitals are also adapted for the continuous growth and change during their life span, because of the requirement of the hospital that changes endlessly, and develops continuously. But the ward areas built in 1970's and 80's have been expanded and reconstructed without reasonable plan of growth and change. So, there is required to the architectural planning on the remodeling strategy of the ward areas. The purpose of this study is to provide the fundamental data for the reasonable design planning and the basic principles of the construction plan in the ward remodeling. So, this study is to investigate and analyze the characteristics of the ward remodeling, the remodeling planning, and the scheduling process in terms of construction. As a result, this study would apply to design strategy for the ward remodeling of general hospitals.

ATM 망에서 ABR 트래픽을 제어하기 위한 EFCI 스위치와 ER 스위치의 혼합

김내진,김진태,박기태 건국대학교 1996 대학원 학술논문집 Vol.43 No.-

새로운 ATM 서비스인 ABR은 최근에 발생된 서비스 클래스이다. ATM 망에서 속도기반 흐름제어 방식은 목적지 또는 망 스위칭 노드에서 발생하는 RM셀들에 포함된 궤한정보를 기반으로하여 ABR트래픽 소스들의 전송속도를 제어하는 것이다. 결국 사용자에게 유용한 대역폭을 할당하는 것이다. ATM 망이 다른 속도제어 방식 즉, EFCI 모드와 ER방식을 사용하는 스위치로 구성되었을 때, 망성능과 대역폭 할당의 공정성에 관하여 연구하였다 ABR, new ATM service, is service class that currently was originated. The rate-based flow control mechanism in Asynchronous Transfer Mode(ATM) networks controls the transmission rate of Available Bit Rate(ABR) traffic sources, based on feedback information contained in the Resource Management(RM) cells coming from the destination and the network switching nodes. Finally by controlling traffic flow, available bandwidth to users is allocated. This paper investigates network performance and fairness of bandwidth allocarion When an ATM network consists of switches using different rate control mechanims, namely, the Explicit Forward Congestion Indication(EFCI) mode and the Explicit Rate(ER) mechanism

스텝응답을 이용한 공정의 전달함수 동조

윤양웅,최정내,김진권 원광대학교 2001 論文集 Vol.26 No.-

논문에서는 공정동조를 위한 새로운 방법을 제시한다. 미지의 동특성을 가지는 공정은 PID 제어기를 적용하기 위해 2차 전달함수로 모델링된다. 우선 오버슈트(os), 정정시간 (ts), 정상상태 값 (yss)가 미지공정의 스텝응답으로부터 얻어지고, 위의 세가지의 파라메터를 이용하여, 전달함수를 얻을수 있다. 제안된 동조방법의 우수성을 보이기 위해 다른 동조방법들과 시뮬레이션을 통하여 비교하여 제시하였다. In this paper, a new method for system identification is proposed. Unknown dynamic system is identified to the second order transfer function, which can be applied to PID controller design. First, overshoot(os), settling time(ts), and steady state value(yss) are obtained from the step response of unknown dynamic system. And then, we can get the second order transfer function using equations which are extracted from those three parameters(os, ts, yss) through mathmatical analysis. In addition, simulation is carried out to show excellent performance of proposed identification method compare with other.

국내 종합병원의 리모델링 사례 연구 : S 병원을 중심으로 Focused on the Case of S Hospital

김하진,김붕식,양내원 한국의료복지시설학회 2002 의료·복지 건축 Vol.8 No.1

As hospitals change continuously and rapidly, the way of growth and change becomes another important factor in the design of a hospital. The hospitals are adapted for the continuous growth and change during their life span. But the hospitals built in 1970's and 80's have been expanded and reconstructed without any plan of growth and change. So, there is required to the architectural planning on the remodeling and modernization strategy of general hospitals. The purpose of this study is to provide the fundamental data for the reasonable design planning and the basic principles of the construction plan in the hospital remodeling. Thus, this study is to investigate and analyze the characteristics of hospital remodeling, the remodeling planning, and the scheduling process in terms of construction. As a result, this study would apply to design guideline for the remodeling of general hospitals.

국내 종합병원 병동부 휴게공간의 이용행태에 관한 조사 연구

지혜진,양내원 한국의료복지시설학회 2007 의료·복지 건축 Vol.13 No.2

The most recent study of the hospital design indicates that the researchers focus more on creating the healing environment within the hospital facility. Furthermore, it demonstrates the environment of individual living space for patients such as hospital wards becomes much more significant. This study seeks to analyze how various configurations and compositions of the resting space in the general hospital in Korea affect on patients in the aspect of healing environment and its treatment provided within the facility. The behavior of patients and their family members are analyzed thru the observation and the surveying process in order to find out the level of satisfaction and their demand for the healing environment in the resting space such as day-rooms, corridors and external garden. Finally, the purpose of this study is to create the principles of architectural composition for the healing environment in the hospital design.

국내 종합병원의 리모델링 공사수행전략에 관한 연구

김하진,양내원 한국의료복지시설학회 2005 의료·복지 건축 Vol.11 No.1

The construction can proceed in different ways according to the acquired profitability of the hospital during the construction and to the features of departments or areas. This study is an analysis of remodeling construction processes to resolve major tasks of remodeling. The remodeling strategies gained from this study can be summed up as follows: 1) Remodeling work in hospitals involves the acquire relocation of space through extensive area renovations and then moving back to the space, and lastly working on the empty space. Thus, it is more advantageous in terms of construction work to demolish the existing buildings than to acquire the relocation space through extensions or renovations. That is, demolition after the maximum utilization of the existing buildings is the most desirable in terms of space availability. 2) The construction methods for remodeling are two: a method of carrying out construction by dividing the plane areas into several individual ones and of working on it floor by floor. In case of ward areas, and the outpatient area, the construction proceeds after securing the relocation space and partially setting construction areas in order to minimize the decrease in profitability due to the smaller number of beds and treatment rooms during construction. If the outpatient diagnosis/ treatment area and the supply area relocate together with the ward areas, there may be extra expenses. Thus, doing construction by area, while partially operating those areas or after relocating the whole areas.

정보교환기의 이중화 타스크 구현 및 성능분석

김내진,김진태 건국대학교 1993 대학원 학술논문집 Vol.37 No.-

본 논문은 정보교환기의 신뢰성을 향상시키기 위해 정보 교환기 시스템을 이중화하여 동작 계열과 대기 계열간에 교환데이타들의 일관성 유지, 이중화와 관련된 유지 보수자의 명령 처리 및 시스켐에 치명적인 이상이 발생한 정상적으로 가입자들의 요구를 수행할수 있는 상태로 유지시켜주는 이중화 타스크의 설계 및 구현하였으며, 또는 이상 상태가 발생한후 정상적으로 가입자들의 요구를 처리할수 있는 상태로 복구하기까지의 처리시간을 구하였다. 뿐만 아니라 타 시스템의 이중화 구현방법을 비교 분석하여 시스템의 이중화 구현하였다. In this paper, We implemented dual system for reliability improvement of IES (Information Exchange System). The Processing task of dual system is composed of Active Side and Stand-by Side, for making consistency maintainence of data exchange, for Making instruction processing of administrator in relation to dual system, and in case of Fatal error on system. We designed and implemented the dual task for exchange processing in normal state. Also, We calculated recovery time of normal state after system error.

RDBMS를 이용한 이중화 구조의 SCADA 시스템 설계

박기태,김진태,김내진 건국대학교 1997 학술논문집 : 건국대 대학원 Vol.45 No.1

Nowadays, we require the control system operated rapidly and - by developing of network and distributed control system - transparency, availability and reliability of the system. In addition, by developing of database system, we try to make management of control data more efficient and consistent. In this paper the system is designed to satisfy scalability, portability and interoperability in the part of data management in SCADA(Supervisory Control and Data Aquisition)system by using relational database. Hardware is made up of main computer unit, communication unit, control unit and a Ethernet data network Main computer unit has the function of supervisory for plant operating and diagnosis with man machine interface. Communication unit has the function of transfer of status information in the field. Control unit carry out the function of the plant control. Ethernet data network enables these unit above to exchange the information in high speed. For fault tolerance when critical error occurs in main computer unit, the function of main computer is changed to slave computer by failover and the control of system could be maintained.