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토목구조물의 스마트 제어를 위한 준능동 MR 감쇠기의 설계 및 성능평가
이제훈 ( Lee Jaehoon ),허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.2
This research developed two semi-active MR dampers whose gaps in the bypass area were different from each other, and evaluated their performance by loading tests. The controlling performance of MR dampers characteristically depends on various factors like their material and mechanical ones, but most importantly on the size of gap in the bypass area. For this research, we designed the bypass gaps of two dampers as each 1.0mm and 2.0mm, both with the 80mm outer diameter of the orifice. We also designed two loading test sets with different input currents, and acquired different control ability from them. The acquired test results were analyzed and evaluated with their maximum and minimum control ability and also their dynamic range from the force-displacement hysteresis loops and the force-input current relationship curve. This research clearly proved how the control capacity of control devices depends on the gap effect, and also presented a possibility that the two dampers developed in this research could be used for the smart control of civil structures by effectively adapting the input current and the number of coil turns.
이제훈(Jaehoon Lee),김경한(Kyunghan Kim),서정(Jeong Suh),윤광호(Kwangho Yoon) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
We designed a synchronization control method to extend processing area that is limit of traditional laser processing system. Demands for high precision laser processing with wide area has been increasing for a number of applications such as in solar cell battery, display parts, electronic component, automobile industry, and so on. The ultra high speed laser scanner system is limited by its size of scanning area, for example 50×50㎟. Even though recently the laser scanner system was developed which can scan a wide area, the distortion of scanning quality may be serious as a scan area increasing. The developed method differentiates with an existing Step & Scanning method in that it can guarantee continuous stage movement, which may improve the processing speed and laser fabrication quality.
3차원 대면적 연속 마이크로 레이저 패터닝을 위한 연구
김경한,손현기,이제훈,Kim, Kyunghan,Sohn, Hyonkee,Lee, Jaehoon 한국레이저가공학회 2015 한국레이저가공학회지 Vol.18 No.4
For continuous laser micro patterning on three-dimensional free form surface, innovative laser system is developed. The two axis galvanometer is combined with the dynamic focusing unit to increase optical distance. Also, it is synchronized with the 3 axis mechanical system. To determine laser machining sequence, laser CAM system is developed. It can make possible of 3D surface micro patterning under $25{\mu}m$ pattern width. The uniformity of pattern width is about 2.8% and it is validated that focal plane is well conserved by the dynamic focusing unit. Velocity and positional information of 1 axis is stage is fed to the scanner control board by the encoder signal and it makes possible real time synchronization. With this system, possible patterning volume is enlarged from $40{\times}40mm^2$ to $40{\times}120{\times}30mm^3$.
유비쿼터스 컴퓨팅을 이용한 건설구조물의 유지관리를 위한 네트워크 실시간 무선계측시스템
허광희 ( Heo Gwanghee ),이규 ( Lee Giu ),이제훈 ( Lee Jaehoon ),이우상 ( Lee Woosang ),전준용 ( Jeon Joonryong ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.2
In this paper, an integrated framework of ubiquitous computing technologies, combining internet technologies and wireless measurements, is developed for infrastructure smart monitoring. This system is designed to communicate through TCP/IP protocol for a remote real-time management. Measured data for smart monitoring is send from the host computer through TCP/IP protocol from a wireless sensor system based on bluetooth technology. Also, management system is designed to respond to the request of network user on real time basis. Laboratory experimental tests are carried out on a self-anchored suspension bridge to verify the effectiveness of this measurement system. Ubiquitous management system is analyzed to estimate real-time wireless sensing capacity and evaluate its performance for monitoring purpose. Finally, the proposed smart management system is proved to be an efficient monitoring technique for infrastructure system.
유비쿼터스 스마트 제어 시스템을 위해 무선 센서유닛을 이용한 구조물의 진동 제어에 관한 연구
허광희 ( Heo Gwanghee ),이규 ( Lee Giu ),이제훈 ( Lee Jaehoon ),전준용 ( Jeon Jonryong ),허용도 ( Her Yong Do ) 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.11 No.1
This paper is study on the ubiquitous smart control for smart wireless sensing unit which is enable to communicate two-way. The smart sensor is produced to be possible to input/output of the electric signal at a time, to perform the acquisition of the data and the control command. And also, it makes the smart control system possible to work in the ubiquitous computing circumstance to develop the interface which is able to the data communication based in the network environment for constructing the manager-oriented support and control system and the condition monitoring as well. The smart control system inputs feedback the acceleration response data which induced to the structures, and outputs to the smart controller through the two-way communication of the smart wireless sensor when performance that is the exceeding of the management index applied. Performance tests are carried out to validate of this ubiquitous smart control system.
유비쿼터스 스마트 제어 시스템을 위해 무선 센서유닛을 이용한 구조물의 진동 제어에 관한 연구
허광희(Heo Gwanghee),이규(Lee Giu),이제훈(Lee JaeHoon),전준용(Jeon JonRyong),허용도(Her yong Do) 한국구조물진단유지관리학회 2007 한국구조물진단학회 학술발표회논문집 Vol.11 No.1
This paper is study on the ubiquitous smart control for smart wireless sensing unit which is enable to communicate two-way. The smart sensor is produced to be possible to input/output of the electric signal at a time, to perform the acquisition of the data and the control command. And also, it makes the smart control system possible to work in the ubiquitous computing circumstance to develop the interface which is able to the data communication based in the network environment for constructing the manager-oriented support and control system and the condition monitoring as well. The smart control system inputs feedback the acceleration response data which induced to the structures, and outputs to the smart controller through the two-way communication of the smart wireless sensor when performance that is the exceeding of the management index applied. Performance tests are carried out to validate of this ubiquitous smart control system.