슬라이딩 관측기를 이용한 유도전동기의 센서리스 제어

우정인,조용길,신동률,박지호 東亞大學校 附設 情報通信硏究所 1999 情報通信硏究所論文誌 Vol.7 No.1

In this paper, the robust vector control method of Induction Motor for the purpose of improving the system performance deterioration caused by parameter variations is proposed. The full order state observer estimates the stator surrent and the rotor flux by using the state prediction of state variables. And, the motor speed is estimated without without speed using the full order state observer. Also, the parameter variation is compensate by the Sliding Observer. By using this method, speed sinsorless control and current contol with no affection of the parameter variation can be obtained simultaneously.

가상현실형 공장관리 시스템의 효과 분석 : VRML을 이용한 생산정보시스템 구축을 중심으로

김정렬 건국대학교 산업대학원 2001 論文集 Vol.13 No.-

This paper investigates possible application of virtual reality technology into manufacturing and production system, strongly advocates the implementation of the production information system equipped with the cutting-edge virtual reality technology, and specifies the detailed procedures and methods to reach the goal. This study argues that the virtual reality technology could cause the shift from traditional static linear production process to novel dynamic interactive production process, which helps to lift temporal and spatial restraints in manufacturing systems in the company by taking an example of the computer manufacturing company, for instance S computer, in Korea, Furthermore, a manager would make more comprehensive and acute decisions more quickly, based on synthetic production information gathered from the interactive Virtual Reality(VR) system. Thus, even though the current hardware in the markets remains expensive and a few technical issues should need to resolve at the present moments, the equipment of virtual reality system in production procedures could make the firm more consumer oriented and bring more profits by creating real-time digital markets in the near future.

우리나라 야생조류의 체내 납(Pb)과 카드뮴(Cd) 축척

김정수,신주렬,이화수,구태회 경희대학교 2006 環境硏究 論文集 Vol.15 No.-

This study presents concentrations of lead and cadmium in liver and kidney in Korean wild birds during 2000-2002. Lead concentrations in livers were Kharadriiformes < Anserifoimes < Kiconiiformes < Falconiformes < Passeriformes < Columbiformes. Their lead concentrations in livers and kidneys was within background level and exposed level. Cadmium concentrations in kidneys were Kharadriiformes < Ciconiiformes < Anseriformes < Falconiformes < Passeriformes < Columbifoimes. Kidney cadmium concentrations in Korean wild birds were within the range of background level, but one Cattle Egret Bibulous ibis and 7 Ancient Murrelet Synthliboramphus antiques was toxic level.

소뇌출혈후 신경인성방광으로 배뇨장애를 주소로 한 환자 치험 1例

안정조,최영,조현경,임승민,김민상,오병렬,유병찬,설인찬 대전대학교 한방병원 2002 惠和醫學 Vol.11 No.1

In patients with Cerebral vascular accident, Voiding Dysfunction is very usual, but if with no improvement for a long time, it can cause many complexed-problems as urinarytract injury, infection or inflamation and patients suffering from pain, inconvenience and anxiety. In this case 58-year-old female with Voiding Dysfunction with Neurogenic Bladder after Cerebellum Hemorrhage, for 6 monts there was no interval change on symptom, We prescribed appropeiate herbal medication, and perform acupuncture and moxa. 5 days later after admission in Taejeon Oriental Hospital, The patien was able to have self-voiding and gradually improved. So we report it for the better treatment.

태권도선수의 경기전 심리불안 해소방법에 관한 실태조사연구

최영렬,최정복 경희대학교 사회체육연구소 1996 體育科學論叢 Vol.- No.9

This study investigated uneasiness and the results are the followings: 1. When they are just behind the playground waiting for the game, At that moment they are in agony more than any other moments, it was discloses that they just simply act which can make them concentrated mentally rather than moving much. As the players are in much mental anxieties 2. The players showed the syndroms such as the fever in the body and the tightened muscle and the feeling of thirsty which are physical symtoms caused by the mental anxieties just from 1 minuts to 3minutes before the game. 3. The players controll themselves by doing the preparatory exercise or looking at the game schedules while they have many solutions for their mental anxieties between 3 minutes and 10minutes before the game. 4. Between 10minutes and 30 minutes before the game, they hane preparatory exercise for little sweat. 5. Between 30 minutes and 1 hour before the game, they use physical exercise such as Deugjumta(Mitchagi) and Yagsukgoerugi as they feel less anxiety at that time, It's considered to be the best way of clearing up the mental uneasiness. 6. 1 hour before the game, they feel the mental anxiety at the least. and they take the plenty of rest after personal warming up. They could up mental anxiety and heighten the power of game. by watching the other games.

반송용 선형 유도 전동기의 급속 제동특성에 관한 연구

우정인,조윤현,노태균,신동률,이채동 東亞大學校 1996 東亞論叢 Vol.33 No.-

The SLIM used in the conveyance system has been generally developed the controller based on the slip frequency control and the VVVF method to obtain the quirk response for the position control signal. This paper deals with the trust control of the SLIM by vector control with Bang-Bang condition. Also, the control system is composed of the Pl controller for soft start of the SLIM and the q-axis current controller for correction in phase with Space Vector for reducing the harmonic pulsation in low speed. The processing for vector control and robust dynamic breaking control is carried out by MC80196KC micro processor and IGBT module. The proposed scheme is verified through the computer simulation and experiments for the 10KW SLIM.

반송용 편측식 선형기기의 추력제어에 의한 특성해석

우정인,신동률,조용길,노태균 東亞大學校 大學院 1999 大學院論文集 Vol.24 No.-

본 논문에서는 PWM 인버터 구동 편측식 선형유도 전동기(이하 SLIM)의 공간백터 제어와 PI 제어를 통한 추력 제어를 행한다. 1차측 권선과 SLIM의 2차측 구조 사이에서 발생하는 공극길이의 떨림은 빠른 응답특성을 얻기위해서 최소화 되어야 한다. 먼저, SLIM의 전압방정식이 추력과 수직력 특성을 해석하기 위하여 d-q축 등가회로로서 나타내어진다. 또한, d-q축 등가회로의 모델링과 해석은 등가회로상에서 전류변동에 따른 강인한 과도 추력특성을 얻을 수 있다. 지령속도와 추력에 의한 SLIM의 직접구동 결과는 실험을 통해서 확인된다.

교류여자방식 브러시리스 동기전동기의 공간벡터에 의한 토오크제어

우정인,정영일,노태균,조용길,신동률 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

In the paper, a vector control method for a AC-excited BLSM(Brushless Synchronous Motor) is proposed. The BLSM has a feature that separate exciter is not needed for excitation. The proposed method is described in two parts as follow, one is the design of drive and the other is a modeling for its imlpementation. Rotor flux is estimated using inditect sensing method based on voltage equation in the synchronously rotation reference frame. And rotor position os calculated from rotor angular velocity and stator current. Through computer simulation results of this prorosed system, it is shown that the BLSM drive has a ability of precision torque control from the static and dynamic performances.

초고속 광대역 파장 가변 광섬유 링 레이저 구현

이정렬,이승우,엄진섭 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

In this paper, we demonstrate a tunable wavelength erbium-doped fiber ring laser. It's tuning interval can be controlled as fine as hundreds of picosecond by using a tunable filter of Fiber Reflection Mach-Zehnder Interferometer with gain-transparent SOA within one arm. And a wavelength tuning range over 17㎚ can be achieved by adjusting the power of 1310㎚ pump light into SOA. Narrow linewidth less than 0.08㎚ and SMSR of more than 30dB is obtained with single-mode operation.

DSP 인버터에 의한 편측식 선형 유도전동기의 비간섭제어

우정인,신동률,조용길,노인배,정영일 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

We proposed the speed control of the inverter-fed SLIM(Single-sided Linear Induction Motor) for conveyance system by the decoupled thrust control with DSP board. The voltage equations of SLIM are expressed on the suitable α-β axis by the proposed equivalent circuits, which can analyze the characteristics of the thrust and the normal force and so on. These control methods, which are the slip angular frequency control and the decoupling control for the thrust and normal force by analyzing these parameters can be successfully driven without interfering of each axis. These results exemplified the linear drive of SLIM with the reference value.