http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Solar-Vehicle를 위한 IPMSM의 MPPT 제어
장미금(M-Geum Jang),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),강성준(Sung-Joon Kang),백정우(Jung-Woo Baek),문주희(Ju-Hui Mun),김순영(Sun-Young Kim),정동화(Dong-Hwa Chung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper proposed design and development the maximum power point tracking(MPPT) control of a photo voltaic (PV) array for interior permanent magnet synchronous motor(IPMSM)drive. Conventional MPPT controller was unstable by reason of the ripple-current of DC link in three phase inverter. Thus in this paper the control algorithm of IPMSM using i<SUB>q</SUB> current is composed to improve the insecurity of conventional MPPT controller. Proposed algorithm is operated by simulation with variation radiation condition. And analyze the response characteristic of IPMSM. The validity of this paper is proved by analyzed data.
장미,강도욱,장은혜,김우진,윤대섭,최정단,M. Chang,D.W. Kang,E.H. Jang,W.J. Kim,D.S. Yoon,J.D. Choi 한국전자통신연구원 2023 전자통신동향분석 Vol.38 No.6
Given recent accidents involving autonomous vehicles, driver monitoring technology related to the transition of control in autonomous vehicles is gaining prominence. Driver status monitoring systems recognize the driver's level of alertness and identify possible impairments in the driving ability owing to conditions including drowsiness and distraction. In autonomous vehicles, predictive factors for the transition to manual driving should also be included. During traditional human driving, monitoring the driver's status is relatively straightforward owing to the consistency of crucial cues, such as the driver's location, head orientation, gaze direction, and hand placement. However, monitoring becomes more challenging during autonomous driving because of the absence of direct manual control and the driver's engagement in other activities, which may obscure the accurate assessment of the driver's readiness to intervene. Hence, safety-ensuring technology must be balanced with user experience in autonomous driving. We explore relevant global and domestic regulations, the new car assessment program, and related standards to extract requirements for driver status monitoring. This kind of monitoring can both enhance the autonomous driving performance and contribute to the overall safety of autonomous vehicles on the road.
최정식(Jung-Sik Choi),고재섭(Jae-Sub Ko),강성준(Sung-Joon Kang),백정우(Jung-Woo Baek),장미금(M-Geum Jang),문주희(Ju-Hui Mun),김순영(Soon-Young Kim),정동화(Dong-Hwa Chung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper proses the novel control algorithm of maximum power point tracking for photovoltaic generation. The grid-connected photovoltaic (PV) power conditioning system (PCS) is the key technology in the future distributed production of electricity using solar energy. There are basically three types of grid-connected PV PCSs: the centralized PCS, the string PCS, and the module integrated converter (MIC) PCS. To improve the PV MIC, it needs the novel control algorithm of maximum power point tracking(MPPT) so that high-efficiency power conversion. The PV panel has a nonlinear characteristics and the power has maximum power point(MPP) at a certain operation point with coordinates voltage and current of MPP. Since the MPP depends on solar irradiation and cell temperature, it is never constant over time. thereby maximum power point tracking (MPPT) should be used to track its changes. The proportionality coefficient of the prediction line is automatically corrected using the hill climbing method (HCM) when the panel temperature of the solar arrays is changed. This paper is proposed the analysis results to verify the effectiveness of this controller.
문주희(Ju-Hui Mun),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),강성준(Sung-Joon Kang),백정우(Jung-Woo Baek),장미금(M-Meum Jang),김순영(Soon-Young Kim),정동화(Dong-Hwa Chung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.10
This paper proposes control system based on PLC for decrease power loss of solar tracking system. Tracking system is automatically tracked solar position. The power of this tracking system is fed by photovoltaic generation and it has problem efficiency decrease due to consume power of tracking system. Tracking system which controlled individually is brought power consumption due to continually feed power. Central control tracking system using PLC can be reduced power consumption more than individual tracking system because it controls a large number tracking device with one control system. Also, this paper uses two-mode tracking algorithm to improve tracking performance. The proposed algorithm is applied photovoltaic system and analyzed power and efficiency and then proved validity of this paper.
은닉 마르코프 모델을 이용한 속도 변화가 있는 회전 기계의 상태 진단 기법
장미(Jang, M.),이종민(Lee, J.M.),황요하(Hwang, Y.),조유종(Cho, Y.J.),송재복(Song, J.B.) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.5
In industry, various rotating machinery such as pumps, gas turbines, compressors, electric motors, generators are being used as an important facility. Due to the industrial development, they make high performance(high-speed, high-pressure). As a result, we need more intelligent and reliable machine condition diagnosis techniques. Diagnosis technique using hidden Markov-model is proposed for an accurate and predictable condition diagnosis of various rotating machines and also has overcame the speed limitation of time/frequency method by using compensation of the rotational speed of rotor. In addition, existing artificial intelligence method needs defect state data for fault detection. hidden Markov model can overcome this limitation by using normal state data alone to detect fault of rotational machinery. Vibration analysis of step-up gearbox for wind turbine was applied to the study to ensure the robustness of diagnostic performance about compensation of the rotational speed. To assure the performance of normal state alone method, hidden Markov model was applied to experimental torque measuring gearbox in this study.
곽동경,이혜상,박신정,최은희,홍완수,장미라 대한영양사협회 1998 대한영양사협회 학술지 Vol.4 No.1
The purpose of this study was to evaluate the preference trend of children in the child-care centers in relation to certain environmental factors such as size of the residing town. This evaluation was conducted using questionnaire survey where the mother of each child was required to complete a preference questionnaire including 83 food items. Statistical data analysis was completed using SAS package program. The results of this survey showed the followings : 1. Generally, the preference level of the children living in large cities were higher than those of medium cities except in case of vegetables, while the preference level of the children living in large cities were higher than those of rural area except in case of hard-boiling(jorim) and vegetables. The subjects showed high preferences to bulgogi(4.53), pork-cutlet(4.52), fried chicken(4.51), jajangmyone(4.45), kimgui(4.43), roasted fish(4.31), kim-bab(4.17), roasted ham(4.13). 2. There was a tendency that a la carte, bread and noodles received higher preference scores. Items of Korean style soup attained higher preference scores than stew(ggigae). The preference scores of fried, broiled or pan-fried items(jun) were higher than those of other items such as seasoned vegetables(namool). 3. The preference scores of children (routinely or occasionally) skipping breakfast or supper were generally low. There was no significant difference according to the existence of mother's job except in case of steamed or pan-fried items, provided that the preference scores of the children whose mother had a job were slightly higher in general. Further, there was no significant difference according to the size of the monthly income of the household except stew, provided that the preference scores of the children whose household had lower income were slightly higher in general.