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우정인,우성훈,노인배,박지호,김동완,Woo, Jung-In,Woo, Sung-Hoon,Roh, In-Bae,Park, Jee-Ho,Kim, Dong-Wan 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.7
본 논문에서는 오존발생장치의 전원측 파형에 포함되는 고주파수의 노이즈를 제거하고, 디지털 궤환 제어에 의해 오존 출력을 제어하기 위하여 전원장치의 출력측 LC 필터와 방전관 용량으로부터 커패시터 전압과 전류를 검출하여 2중의 제어루프를 설계하였다. 디지털 제어기의 연산지연시간을 보상하기 위하여 연산지연시간을 전원장치 플랜트의 고유한 파라미터로 가정하고, 플랜트 모델에 포함시켜 모델링 하였다. 오존발생장치의 부하변동에 따르는 과도상태 응답특성을 개선하고, 파라미터 변동에 강인한 특성을 얻기 위하여 내부 전류 모델 제어기를 제안하였다. 또한 오존발생장치용 전원장치에서 영 오차의 정상 상태를 얻기 위하여 외부 전압 제어루프를 구성하여 비례 제어기와 공진 제어기를 병렬로 연결한 비례-공진 전압제어기를 제안하였다. In this paper, a constant output power supply system for ozonizer is proposed to remove the noise of ozonizer and control the output of ozonizer using feedback control. The proposed system is based on the rouble control loop such as the outer voltage control loop and inner current control loop. In the proposed system overshoots and oscillations due to the computation time-delay are compensated by explicit incorporation of the time-delay in the current control loop transfer function. The inner current control loop is adopted by an internal model controller. The internal model controller is designed to a second order deadbeat reference-to-output response which means that its response reaches the reference in two sampling time including computational time-delays. The outer voltage control loop employing P-Resonance controller is proposed. The resonance controller has an infinite gain at resonant frequency, and the resonant frequency is set to the fundamental frequency of the reference voltage in this paper. Thus the outer voltage control loop causes no steady state error as regard to both magnitude and phase. The effectiveness of the proposed control system has been verified by the experimental results.
무성방전 오조나이저의 성능개선을 위한 2중 디지털 제어기의 설계
朴志浩(Jee-Ho Park),金?完(Dong-Wan Kim),禹盛薰(Sung-Hoon Woo),盧仁培(In-Bae Roh),禹靖仁(Jung-In Woo) 대한전기학회 2006 전기학회논문지 P Vol.55 No.1
In this paper, a control method of ozone generator for a tiny deodorizer is proposed, and also a cooling technique is described which is cooling down the flowing air gap into a silent discharger to 2[℃] to generate ozone of high density and diffusing power. As the digital control system for this method, a double feedback loop is designed which detects the voltage and current of equivalent capacitor of the discharger and compensates for the poor power waveform caused by the noise at high discharging frequency. During the plant modeling of this system, computing time factor is considered as a unique parameter of the power system to improve the respond characteristics with regard to fluctuating load and to replenish the computing time delay of the controller. Through the experiment, sinusoidal input current for discharger can be acquired and all the effectiveness of this accurate control system over unstable ozone discharger are proved.
무손실 공진기를 이용한 능동전력필터의 Deadbeat제어
박지호(Jee-Ho. Park),노태균(Tae-Kyun. Roh),김춘삼(Choon-Sam. Kim),안인모(In-Mo. Ahn),우정인(Jung-In. Woo) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, a new simple control method for active power filter which can realized the complete compensation of the harmonic currents is proposed In the proposed scheme, a compensating current reference generator employing lossless resonato implemented by a DSP(Digital Signal Processor) is introduced. Deadbeat control is employed to contro the active power filter The switching pulse width based SVM(Space Vector Modulation) is adopted so that the current of acttve power filter is been exactly equal to its reference at the next sampling Instant To compensate the computation delay of digital controller, the prediction of current is achieved by the current observer with deadbeat response
사업구조 전략 분석을 통한 세계 선진기업 선정 및 특성분석
우정석,장현승,최석인,박찬식,Woo, Jung-Suk,Jang, Hyoun-Seung,Choi, Seok-In,Park, Chan-Sik 한국건설관리학회 2009 한국건설관리학회 논문집 Vol.4 No.2
건설 관련 기술 및 시장은 최근 시간과 장소를 떠나 글로벌 시장이라는 하나의 울타리 내에서 이루어지고 있다. 또한, 대기업 중심이었던 해외건설시장에서 중소기업의 비중이 확대되고 있는 시점에서 이들 건설기업의 이윤확대를 위해서는 더욱 효율적이고 생산적인 사업구조 전략이 절실히 요구된다. 이러한 기업의 전략을 위해 건설기업들은 일반적으로 타 기업과의 비교분석을 통해 부족한 점을 인식하고 발전시키기 위한 벤치마킹을 실시하고 있다. 이에 본 논문은 세계 건설업체의 다양한 사업구조전략 및 변화모습을 분석하여 선진 건설업체를 선정하는 한편 이들 기업의 전략 특성을 살펴보고자 한다. 또, 벤치마킹을 위한 선진기업의 선정 방법을 소개하는 또다른 목적을 가질 수 있겠다. 선진 건설업체를 선정하기 위해 시장점유율(매출)변화 분석, 건설 상품별 전문성 분석, 그리고 사업 포트폴리오전략 분석을 방법론으로 이용하였으며 자료는 ENR지에서 발표되는 세계 건설기업의 매출과 상품별 비중을 참고하였다. Strategic planning is an essential function of senior management in any business firm. Planning involves the firm's behavior in an competitive market and adaptation of the company's resources towards the selected market strategy. This study presents a methodological procedure for strategic planning in global top-tier construction firms. This procedure consists of the following stages. First, analyzed growth of revenue in which weight of total construction firms' revenue shown in Global Top 225 Contractors(ENR). Second, analyzed specialty of construction products. The products are General Building, Power, Water Supply, Industrial/Petroleum Process, and Transportation. Third, analyzed business the portfolio plan. The business portfolio plan includes both local/overseas market and specification/diversification of construction products. It affects the subsequent choice of a benchmarking for development of each construction company. The choice of the benchmarking firm, among several available alternatives, should follow a careful analysis of the characteristics and benefits inherent in the implementation of each.
노인배(In-Bae No),박성원(Sung-Won Park),박지호(Jee-Ho Park),김동완(Dong-Wan Kim),우정인(Jung-In Woo) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
In this paper, an automatic lighting control system is developed using micom. The developed system consists of digital lighting control system, analog lighting control system, and simulator. In the developed system, ATMega128 is used as the main controller. The developed digital lighting control system consist of eight parts and the developed analog lighting control system consist of six parts respectively. Additional, the developed simulator consist of analog and digital simulation using graphic user interface.