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개선된 PID 제어기를 이용한 Wind Turbine의 피치 제어
전종현(Jonghyun Jeon),권오신(Oshin Kwon),김진성(Jinsung Kim),허훈(Hoon Heo) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
The study described in this paper is aimed to maintain a constant output of wind turbine system via pitch control of wind turbine using Advanced PID(APID) controller. In order to improve dynamic response characteristic in terms of pitch angle and disturbance reject, the APID controller is developed. The structure of the APID is composed with derivative P controller and new type of integral control action. This new improved integral control has concept of error window and weight function concept. The performance of the APID control technique is compared with those of conventional ones via simulation. Simulation results show that the proposed method is effective and enhanced the dynamic performance of the system.
메탄 부분산화 반응을 위한 고분산된 팔라듐-니켈 촉매 합성 및 반응
이승현 ( Seunghyun Lee ),전종현 ( Jonghyun Jeon ),김주찬 ( Juchan Kim ),하경수 ( Kyoung-su Ha ) 한국화학공학회 2021 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.59 No.2
메탄의 부분 산화반응을 위해 규칙적인 메조기공을 갖는 실리카를 지지체로 한 니켈 촉매를 제조하였다. 니켈 플레이팅(Nickel plating) 방법을 이용하여 촉매 제조 시 기존 함침 촉매 제조법과 달리 니켈이 실리카 표면에 도포된다. 이 때 니켈이 고분산 되어 안정적인 니켈입자를 형성하게 된다. 니켈 플레이팅 촉매의 경우, TEM-EDS 분석에서 니켈이 매우 고분산 된 것을 확인할 수 있었다. 이러한 고분산된 촉매로 메탄 부분산화 반응 시 기존 함침촉매와는 달리 니켈의 소결과 탄소침적이 상대적으로 적어 촉매의 비활성화가 매우 낮았다. 팔라듐은 환원 조촉매로서의 역할을 하여, 메탄 전환율과 생성된 합성가스의 H<sub>2</sub>/CO 비 관점에서 우수한 반응 성능을 보이는 것을 확인 할 수 있었다. In this study, ordered mesoporous silica-supported Ni catalysts were prepared for catalytic partial oxidation of methane (CPOM) by using electroless nickel plating method. Unlike conventionally impregnated catalysts, the electrolessly-plated nickel catalyst showed that nickel was highly dispersed and formed stably on silica-supported surface. It was verified by TEM-EDS analysis. During the activity tests, the electrolessly-plated nickel was barely sintered and the amount of carbon deposition was very small. Consequently, the catalyst was far less deactivated, while the sintering was significantly observed in the cases of the catalysts prepared by the conventional impregnation method. Regarding the palladium-promoted catalysts, the reducibility of nickel was increased, and the reaction performances were enhanced in terms of CH<sub>4</sub> conversion and H<sub>2</sub>/CO ratio of produced syngas.
SVDD 기법을 이용한 하이브리드 전기자동차의 고장검출 알고리즘
나상건(Sanggun Na),전종현(Jonghyun Jeon),한인재(Injae Han),허훈(Hoon Heo) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.4
In this paper, in order to improve safety of hybrid electric vehicle a fault detection algorithm is introduced. The proposed algorithm uses SVDD techniques. Two methods for learning a lot of data are used in this technique. One method is to learn the data incrementally. Another method is to remove the data that does not affect the next learning. Using lines connecting support vectors selection of removing data is made. Using this method, lot of computation time and storage can be saved while learning many data. A battery data of commercial hybrid electrical vehicle is used in this study. In the study fault boundary via SVDD is described and relevant algorithm for virtual fault data is verified. It takes some time to generate fault boundary, nevertheless once the boundary is given, fault diagnosis can be conducted in real time basis.