객체지향법을 이용한 풍력시스템용 공압시스템 설계 소프트웨어 플랫폼 개발

최경현(K. H. Choi),김수진(S. J. Kim),김형찬(H. C. Kim),도양회(Y. H. Doh),김동수 (D. S. Kim) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6

The optimization design of the pneumatic system for the WTGS(Wind turbine generate system) is able to lead the energy efficiency increasement and resources saving. Also it can support the improvement of the functions such as the high speed operation, low speed operation, low weight, and complexity of pneumatic systems. In this paper apply WTGS to the pneumatic system design software and the development of the optimal software platform will be based on object-oriented technology.

CAES 최적 소프트웨어를 위한 공압시스템 데이터베이스 모듈 개발

최경현(K. H. Choi),김수진(S. J. Kim),김형찬(H. C. Kim),도양회(Y. H. Doh),김동수(D. S. Kim) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6

The optimization design or the pneumatic system has to know data of various pneumatic parts. Also it can support the improvement of the functions such as the high speed operation, low speed operation, low weight, and complexity of pneumatic systems. In this paper the developmnet of the software will described based on Object-oriented method, which will apply to pneumatic software. And through pneumatic system construction, develop the optimaization design of the pneumatic software environment.

Saturn V 발사체 1단(S-IC) 추진기관 시스템 연구

홍용기(Yonggi Hong),김철웅(Cheulwoong Kim) 한국추진공학회 2015 한국추진공학회지 Vol.19 No.2

It had been almost a half century since Apollo Mission was ended. However, in these days, a lot of researches are being conducted for restoration and making improvements in technologies used in Saturn V rockets development. This study reviews the first stage of Saturn V rocket(S-IC), from development history to technologies in various subsystems such as engine purge system, POGO suppression system, hydraulic and pneumatic control system, propellant dispersion system, telemetry system and retrorocket system. Understandings of S-IC stages operation systems would be helpful in understanding of launch vehicle system and reduction of time and cost in future development process.

Saturn V 1단 발사체(S-IC) 특징 분석

홍용기(Yonggi Hong),김철웅(Cheulwoong Kim) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12

Apollo Mission이 종료된지 거의 반세기가 지났지만, 지금도 Saturn V 발사체의 기술의 복원과 개량을 위한 연구가 활발하게 진행되고 있다. 본 연구에서는 Saturn V 발사체의 1단 로켓(S-IC)의 개발 과정과 엔진 퍼지, 포고현상 억제 방법, 연료탱크 가압 방식, 유압 및 공압 시스템의 운용 방식 등에 대한 특징들에 대해 조사하였다. S-IC의 각 시스템의 특징에 대한 이해는 발사체 시스템의 이해를 도울 수 있고, 향후 발사체 개발시에 시간, 비용 등의 절감 효과를 가져다 줄 수 있는 유용한 참고 자료가 될 것이라 예상된다. It had been almost a half century since Apollo Mission was ended. However, in these days, a lot of researches are being conducted for restoration and making improvements in technologies used in Saturn V rocket’s development. This study reviews the first stage of Saturn V rocket(S-IC), from development history to technologies in various subsystems such as engine purge system, POGO suppression system, hydraulic and pneumatic control system, propellant dispersion system, telemetry system and retrorocket system. Understandings of S-IC stage’s operation systems would be helpful in understanding of launch vehicle system and reduction of time and cost in future development process.

공압 시스템을 이용한 바이패스형 매연여과장치의 실험적 연구

김상암 한국수산해양기술학회 2018 수산해양기술연구 Vol.54 No.1

Intermittent duty of emergency generator has problems emitting large quantities of PM and NOx in exhaust gas. The aim of this study is to propose DPF system which can be applied to medium-large emergency generators. The system is composed of soot dust collector, silencer and filter trap, which is designed to reduce PM emissions at the emergency generator start-up. The pneumatic system controls a flow direction of exhaust gas to pass through the soot collector and filter trap until the engine reaches complete combustion condition. An experiment is performed to measure PM content and concentration to analyze the performance and characteristics of the proposed system. 중대형 디젤발전기에서 배출되는 배기가스는 pm과 nox를 다량으로 배출하는 문제점을 갖고 있다. 이 연구는 중대형기관용 그으름집진기, 소음기 및 필터 트랩을 포함하는 DFP 장치를 개발하고 제안하는 것을 목적으로 한다. 디젤엔진의 배가가스로 부터 배출되는 PM을 최소화 하기위해서 공압시스템을 사용한다. PM과 같은 유해한 그을음을 포함한 배기가스가 시동초기에 집진 장치로 통과하며, 일정한 시간 후 완전연소범위에 진입하면 원래의 배기계통으로 배출되는 바이패스형 매연저감장치를 제안하고 성능실험과 특성을 비교 분석한다

공압실린더의 위치제어

서정덕(Jung-Duk Seo),이성구(Seong-Ku Lee),김건회(Gun-hoi Kim) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-

The hydraulic/pneumatic pressure products are applied widely in current industrial area such as in the automation of products assembly, automation of equipment assembly, high-tech machine tool, aircraft, and train, and as the industry development is on progress, the development of the hydraulic/pneumatic pressure products is necessary and it is required in every industrial area. This research developed a position control system of the pneumatic cylinder using a pneumatic cylinder, four two-port valves, two three-port valves, two pressure valve, a check valve, two proximity sensors, and a program logic controller (PLC) to minimize the allowable error on the position control of pneumatic cylinder system and to develop a pneumatic cylinder valve system for further study. The maximum air pressure used for the position control test was 5 ㎏/cm2 and the displacement accuracy of the pneumatic cylinder was measured using a dial gauge. The supply and discharge air pressure and the length of the stroke of the pneumatic cylinder were controlled and set before experiment. The test of the position control of the pneumatic cylinder was carried out 50 times and replicated three times at each condition of the supply and discharge air pressure (2.5/3.5, 3.0/4.0, 3.5/4.5, and 4.0/5.0 ㎏/cm2) and selected stroke length of the pneumatic cylinder. The accuracy of the position control of the pneumatic cylinder increased as the supply and discharge air pressure increased at the stroke length was fixed as 133 ㎜, and increased as the stroke length increased with the fixed supply and discharge air pressure of 3.5/4.5 ㎏/cm2 of the pneumatic cylinder. The most accurate position control of the pneumatic cylinder (i.e., standard deviation of 0.01 ㎜) was obtained at the supply and discharge air pressure of 4.0/5.0 ㎏/cm2 and the stroke length of 170 and 190 ㎜.

공압 레귤레이터의 공급시 압력강하 특성 및 제어방법

조남경(Nam-kyung Cho),정용갑(Yong-Gahp Chung),남중원(Jung-Won Nam),조인현(In-Hyun Cho) 한국추진공학회 2009 한국추진공학회 학술대회논문집 Vol.2009 No.11

공압시스템은 지상설비 및 발사체 공급시스템에 광범위하게 활용되고 있다. 공압시스템의 목적은 수요처에서 요구되는 유량 및 압력을 요구조건에 맞게 공급하는 것이다. 발사체 관련 가스공급은 타 분야 가스공급과는 달리 대유량의 가스공급이 일반적으로 요구되며, 이때 공급압력이 감소되어 유량을 공급하는 동안 요구되는 압력을 만족시키지 못하는 현상이 흔히 발생한다. 공급시 압력감소는 레귤레이터의 특성과 직접적으로 연관되어 있다. 본 논문은 대유량 가스공급시 공급압력 감소와 관련된 레귤레이터의 특성을 제어이론의 측면에서 검토하였고 이를 개선시킬 수 있는 방법을 이론적으로 제시하였다. Pneumatic system is widely applied to ground facility and launcher on-board system. The main requirements of pneumatic system is to meet pressure and flow requirements of gas consumers. For launcher related applications, different from other applications, very high flow is required which can leads to supply pressure drop against required setting pressure. The supply pressure decrease is closely related to regulator characteristics. In this paper, the characteristics of pneumatic regulator related to supply pressure decrease and the control methods for reducing the pressure offset are reviewed.

도표를 이용한 전기공압시스템 순차제어 설계방법 제안

김철재(Cheol Jae Kim),임상규(Sang Gyu Im) 산업기술교육훈련학회 2018 산업기술연구논문지 (JITR) Vol.23 No.1

This paper proposes a sequential control design method of electric pneumatic system using chart. Existing methods are limited to actual field application because the conditions under which the system has been added have been added separately. The design methods presented in this paper can be logically designed using diagrams, and the same applies to systems that contain both sides of a mixture, single solenoid and double solenoid sides. Further, the schematic diagram is easy to detect during the site installation and design of additional functions during operation. The learner may have a logical learning process and a stable outcome. We expect field engineers to give substantial assistance to design, repair and modification of systems.

객체지향접근법을 이용한 CAES 최적 소프트웨어 개발

최경현(Kyung-Hyun Choi),김수진(Soo-Jin Kim),김형찬(Hyung-chan Kim),고정범(Jeong-bum Ko),도양회(Yang-hoi Doh),김동수(Dong-Soo Kim) 한국유체기계학회 2008 유체기계 연구개발 발표회 논문집 Vol.2008 No.-

The optimization design of the pneumatic system is able to lead the energy efficiency increasement and resources saving. Also it can support the improvement of the functions such as the high speed operation, low speed operation, low weight, and complexity of pneumatic systems. In this paper the development of the software will be described based on Object-Oriented technology, which will provide function for development of pneumatic system without any deep knowledge about pneumatic system.

공압시스템의 공급능력 예측기법

조남경(Namkyung Cho),정용갑(Yong-Gahp Chung),신동순(Dong-Soon Shin),조인현(In-Hyun Cho) 한국추진공학회 2009 한국추진공학회지 Vol.13 No.5

Pneumatic system is widely applied to ground facility and launcher on-board system. One of the important aspects of pneumatic system is to meet pressure and flow rate requirements of gas consumers. In this paper, a systematic analytical approach for pneumatic system is proposed, which uses and systematically combines previous studies. The proposed analytical method is that pressure/flow calculation using conservation equations are combined with sonic limit check at vena contracta of the components of pneumatic system, which checks the installed components whether they are merely pressure loss elements or flow limiting element of the system. In this paper, gas consumers are categorized and simulated using the proposed method. The results reveal that the feeding performance of general pneumatic system can be properly estimated using the proposed approach.