고무관련 기술에 대한 특허 관리(II)

백승준,Baek, Seung-Jun 한국고무학회 2015 고무기술 Vol.16 No.2

각국의 단말장치 회선평형도 기술기준 비교분석

백승준,김영태,김용환,Baek, Seung-Jun,Kim, Yeong-Tae,Kim, Yong-Hwan 한국전자통신연구원 1990 전자통신동향분석 Vol.5 No.3

통신신호가 통신회선을 통하여 전파될 때, 선로에 불평형이 나타나는 경우 가입자 선로와 대지간에 유도전류가 발생하여 대지로 흘러가게 되며 통신망의 성능에 영향을 미치게 된다. 본고에서는 통신회선의 불평형정도를 나타내는 평행도에 관하여 그 개념을 기술하고 각국에서 제시된 기준을 비교.분석한다.

무인 쿼드로터 로봇의 위치 제어를 위한 Fuzzy 제어기 설계

백승준(Seung Jun Baek),이덕진(Deok Jin Lee),전영필,정길도(Kil To Chong) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5

INS/GPS 통합 항법 시스템의 위치 오차 개선을 위한 IMM 필터 설계

백승준 ( Seung-jun Baek ) 한국항행학회 2019 韓國航行學會論文誌 Vol.23 No.3

본 논문에서는 위성 항법 해를 이용하여 INS의 순수항법을 보상하는 INS / GPS 통합 항법 알고리즘을 구성할 때 불안정한 위성 항법 위치 해 출력에도 안정적인 항법 성능을 보장할 수 있는 IMM (interacting multiple model)필터를 설계하였다. INS / GPS 통합 항법 시스템 구조 내에 칼만필터를 서브 필터로 하는 IMM 필터 구조를 정의하였다. IMM필터 구성시 서브필터는 2개로 구성하였으며, 각각의 칼만필터는 INS의 오차 방정식으로부터 위치, 속도, 자세, 센서 오차 등으로 구성한 16차의 상태를 정의하고 추가로 위성항법의 유색 잡음(coloured measurement noise)영향으로 2차를 확장하였다. 제안한 IMM 필터의 성능을 확인하기위해 위성항법에 임의의 오차를 위도와 경도에 삽입하고 필터의 추종성을 확인하는 것으로 성능을 비교 분석하였다. 몬테카를로 시뮬레이션을 100회 수행하여 결과를 RMS로 비교한 결과 제안한 필터 방식이 오차에 대해 안정적이며 빠른 수렴결과를 보이고 있음을 확인할 수 있었다. In this paper, interacting multiple model (IMM) filter was designed that guarantees a stable navigation performance even in the unstable satellite navigation position. In order to design IMM filter in INS / GPS integrated navigation system, sub filter of the IMM filter is defined as Kalman filter. In the IMM filter configuration, two subfilters are determined. Each Kalman filter defines the six-teenth state composed of position, velocity, attitude, and sensor error from the INS error equation and the states additionally derived in case of the coloured measurement noise. In order to verify the performance of the proposed filter, we compared the performance how the filter works in the presence of arbitrary error in GPS navigation solution. The Monte Carlo simulation was performed 100 times and the results were compared with the root mean square(RMS). The results show that the proposed method is stable against errors and show fast convergence.

무인 쿼드로터 로봇 횡 방향 제어를 위한 Fuzzy-PI 제어기 설계

백승준(Seung-jun Baek),이덕진(Deok-jin Lee),박종호(Jong-ho Park),정길도(Kil-To Chong) 제어로봇시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.2

Quadrotor UAV (Unmanned Aerial Vehicle) is a flying robotic platform which has drawn lots of attention in the recent years. The attraction comes from the fact that it is able to perform agile VTOL (Vertical Take-Off Landing) and hovering functions. In addition, the efficient modular structure composed of four electric rotors makes its design easier compared to other single-rotor type helicopters. In many cases, a quadrotor often utilizes vision systems in order to obtain altitude control and navigation solution in hostile environments where GPS receivers are not working or deniable. For carrying out their successful missions, it is essential for flight control systems to have fast and stable control responses of heading angle outputs. This paper presents a Fuzzy Logic based lateral PI controller to stabilize and control the quadrotor vehicle equipped with vision systems. The advantage of using the fuzzy based PI controller lies in the fact that it could acquire a desired output response of a heading angle ven in presence of disturbances and uncertainties. The performance comparison of the newly proposed Fuzzy-PI controller and the conventional PI controller was carried out with various simulation results.

대형 유조선 충돌 시 2차사고 방지를 위한 잔류강도 예측 기법 개발

백승준(Seung Jun Baek),손정민(Jung Min Sohn),백점기(Jeom Kee Paik),김상진(Sang Jin Kim) 대한조선학회 2018 大韓造船學會 論文集 Vol.55 No.2

This study aims to establish a mathematical formula to provide rapid and safety estimation of the damaged double hull tankers under ship-ship collision. Difference in heights between the striking and struck ships ‘h’ and penetration depth ‘x’ were considered as the main parameters. In ship-ship interaction, Large oil tankers are selected as target struck vessels, and they are struck by Very Large Crude-Oil Carrier (VLCC) class oil tanker. The residual strength of damaged ship at several locations and collision scenarios were carried out using Intelligent Supersize Finite Element Method (ISFEM) which considers the progressive collapse behavior of ship hulls strength. Based on these results, satisfactory was achieved and empirical formula was successfully established using the regression analysis method by deploying the height difference ‘h’ and penetration depth ‘x’ as the observed parameters.

PVK:Ir(ppy)₃ 발광부를 갖는 고분자 인광 발광다이오드의 특성평가

백승준(Baek, Seung-Jun),공수철(Gong Su-cheol),이호섭(Lee, Ho-Sub),장성규(Jang, Seong-Kyu),장호정(Chang Ho Jung) 한국산학기술학회 2010 한국산학기술학회 학술대회 Vol.- No.-

고분자 발광다이오드(polymer light emitting diode, PLED)는 초박막화, 초경량화가 가능하며 간단한 용액공정 으로 향후 휨성(flexible) 디스플레이로의 응용이 가능할 것으로 기대되고 있다. 본 연구에서는 녹색 고분자 유기 발광다이오드를 제작하고, 효율을 향상 시키고자 이중 발광층을 두어 전기·광학적 특성을 평가하였다. ITO/Glass기판 위에 정공주입층으로 PEDOT:PSS [poly(3,4-ethylenedioxythiophene):poly(styrene sulfolnate)]를 발광물질로는 형광 발광물질인 PVK(poly-vinylcarbazole)와 인광 발광 물질인 Ir(ppy)3[tris(2-phenylpyridine) iridium(III)]를 각각 host와 dopant로 사용하였다. 정공 차단층 및 전자 수송층 두 개의 역할로 사용 가능한 TPBI(1,3,5-tris(2-N-phenylbenzimidazolyl) benzene)를 진공 열증착법으로 막을 형성하였다. 전자주입층으로 LiF(lithium flouride)와 음극으로 Al(aluminum)을 증착하여 최종적으로 ITO/PEDOT:PSS/PVK:Ir(ppy)3/TPBI/LiF/Al 구조를 갖는 녹색 형광:인광 혼합 유기 발광 다이오드를 제작하였다.

초정밀 가공용 고정구 설계 및 해석

백승준(Baek Seung-jun),강민호(Kang Min-ho),오재국(Oh Jae-guk),김우순(Kim Woo-sun),김동현(Kim Dong-hyun) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-

Common difference in product that is required in super minuteness processing causes important effect to work-piece. In this treatise fixing method of existent structure using air-absorption power that is other method Simulation incidental and value fill. This could get result that lay more than existent fixture fixing. Also, to processing product by shape accuracy elevation in forward super minuteness processing development contribute can.

긴급 상황에 대비한 무인 쿼드로터의 안전 착륙 제어

백승준(Baek, Seung-Jun),박종호(Park, Jong-Ho),류지형(Ryu, Ji-Hyoung),임신택(Lim, Shin-Teak),정길도(Chong, Kil-To) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.4

미래 유통 혁신 및 도심에서의 긴급 차량 운행에 도움을 주고자 차량 이동 정보 등이 포함된 실시간 교통 상황 정보 및 긴급 정보 제공 등을 위하여 무인 쿼드로터의 사용하고자 할 경우 무인 쿼드로터의 사용 안전성을 충분히 고려해야 한다. 따라서 본 연구에서는 4개의 모터를 가지고 있고 시스템적으로 구조적 균형이 잘 잡혀있는 무인 쿼드로터 시스템의 안전성 증대를 위하여 도심에서의 안전 착륙 제어에 대한 연구를 무인 쿼드로터 시스템의 비선형 특성을 고려한 운동학 및 동역학적 모델 기반 및 외란이나 시스템 비선형성에 강인한 Fuzzy제어기를 통하여 진행하고자 하며,이를 컴퓨터 시뮬레이션을 통하 여 분석 하였다. If you want to use the unmanned quad rotor for emergency information provision and information about the traffic situation of real-time and moving information is included in the car to help in emergency vehicle operation of the city and in the distribution future innovation the need to consider to have enough safety of the use of silent quad rotor. Therefore, in this study, the unmanned quad rotor system research of safe landing control from the center for the improvement of safety of unmanned quad rotor system you have a motor of four, has taken a good structural balance system based on the dynamic model and motion considering the nonlinear characteristics, and attempts to proceed via non-linearity and system disturbances, tough Fuzzy controller, and analyzed through a computer simulation result.

가치사슬 활동이 종합병원 경영성과에 미치는 영향 분석

백승준 ( Seung Jun Baek ),김영훈 ( Young Hoon Kim ),김한성 ( Han Sung Kim ),최영진 ( Young Jin Choi ),한휘종 ( Whie Jong Han ),윤병준 ( Byoung Jun Yoon ),우정식 ( Jung Sik Woo ),김효정 ( Hyo Jeong Kim ) 한국병원경영학회 2014 병원경영학회지 Vol.19 No.3

This study, targeting Korean tertiary hospitals and general hospitals, aims to analyze how value chain model inhealth and medical institution suggested by Duncan and else influences on hospital management. A survey wasconducted to verify the actual proof analysis of this study model. 880 questionnaires were distributed to entire 88hospitals and 739 copies were returned from 76 hospitals. This study mainly consists of three steps to analyze theeffect value chain activity has on management performance of general hospitals. For the first step, we analyzedthe effects service delivery activity has on management performance. For the second step, we analyzed theeffects service support activity has on management performance and for the third, we analyzed the effectsinteraction between service delivery activity and service support activity has on management performance. Themain results of this study are as follows. First, in terms of the management performance of scale, the factors whichinfluenced on daily charge of outpatient were service activity before treatment, at the moment of treatment andvalue chain activity, while more important factors in daily charge of inpatient were organizational culture,organizational structure and value chain activity. In terms of management performance of quality, the factors whichinfluenced on the first medical examination rate of outpatient were service activity before, at the moment of andafter treatment, while activity at the moment of treatment, organizational structure, and value chain activity which isinteraction were more important factors in average length of stay. In terms of non-financial performance, themanagement performance factors which influenced on job satisfaction were service activity at the moment of, afterthe treatment and value chain activity, while organizational culture, strategy resources and value chain activitywhich is interaction were more important factors in job commitment. Secondly, all the service support activity,service delivery activity and value chain activity had statistically significant effect on management performance.Among the three factors, service support activity had relatively high effect than others.