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산업용 정밀 가공 시스템 모니터링을 위한 웹 기반 HMI 설계 및 개발
심용헌(Yong-Heon Sim),이홍익(Hong-Ik Lee),윤연상(Yeonsang Yoon),조경재(Kyungjae Joe),김웅기(Woonggy Kim),성민영(Minyoung Sung) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11
A human-machine interface (HMI), as part of the industrial control systems, enables field engineers to monitor, configure and control the systems. Existing HMI applications typically use a framework that depends on a specific operating environment, such as MFC, and have limited scalability because they use legacy hardware, such as a serial interface, to communicate with peripherals. In this paper, we propose a web-based HMI for the monitoring and control of industrial control systems. The proposed web-based HMI consists of a JavaScript-based web application and a backend server for the control system. It transmits the control commands entered by users to the control system and displays the process data, such as the current position of each axis, in the web browser. Using the HMI, we evaluate the performance metrics such as the response delay when performing the main functions in the industrial control system such as jogging and emergency stop.
음압격리병상에서의 환기방식에 따른 토출입자의 거동 특성에 대한 해석적 연구
정민지(Minji Jung),윤홍익(Hong Ik Yoon),홍진관(Jin Kwan Hong) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6
This study investigates the influence of ventilation type on the transport characteristics of coughing particles in Airborne Infection Isolation Room (AIIR), which is commonly called negative pressure isolation room. Computational Fluid Dynamics (CFD) was used to simulate the airflow and for tracing the behavior of particles. The results show that the airflow pattern has a significant influence on the particle dispersion characteristics. Sidewall exhaust system is more effective than ceiling exhaust system for particle removal. Although it is an isolation room that produces unidirectional flow, coughing particles can spread to the whole room and a large number of particles can be deposited onto patient, bed, side rails, healthcare worker, ceiling, floor, and sidewall.
공동주택의 최적 열공급을 위한 난방부하 예측에 관한 연구
김태호(Tae-Ho Kim),유성연(Seong-Yeon Yoo),한규현(Kyou-Hyun Han),윤홍익(Hong-Ik Yoon),강형철(Cheol-Hyeong Kang),김경호(Kyung-Ho Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
Prediction of heating load is necessary in order to determine the optimal scheduling control of district heating systems. Heating loads in apartment building are affected by many complex parameters, so it is necessary to develop high efficient, flexible, easy to use method of prediction of heating load. In this paper, parameters obtained from simple conditions included in apartment building specifications and the estimated temperature and humidity are used to predict the hourly heating load of the next day, and water load are predicted by comparing summer load with winter load. In order to validate the performance of the proposed method, heating load data measured form benchmarking district heating system are compared with the predicted results. As comparing predicted heating loads with measured data, monthly load error had a range from 0.06% to 18%, and in heating period, mean error was 4.68%
김태호(Tae-Ho Kim),유성연(Seong-Yeon Yoo),한규현(Kyu-Hyun Han),윤홍익(Hong-Ik Yoon),강형철(Hyoung-Chul Kang) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
As the modern buildings are gradually air-tightened for energy saving, the important of ventilation is increasingly being emphasized. The purpose of this study is to develop ventilation control method considering outdoor cooling/heating loads as well as indoor air quality. Two control methods, control of allowable CO₂ concentrations and control of fan flow rates, are investigated and the results are compared. Allowable concentrations are adjusted using a ON/OFF control, and fan flow rates are controlled using a fuzzy algorithm. Comparing with the existing control method, a little increase of CO₂ concentration is found, but more than 10% of energy is saved. If the appropriate correction of fuzzy rule is made depending on the site, more positive results could be obtained.
공동주택의 최적 열공급을 위한 난방부하 예측에 관한 연구
유성연(Seong-Yeon Yoo),김태호(Tae-Ho Kim),한규현(Kyou-Hyun Han),윤홍익(Hong-Ik Yoon),강형철(Hyung-Chul Kang),김경호(Kyung-Ho Kim) 대한기계학회 2012 大韓機械學會論文集B Vol.36 No.8
지역난방 시스템의 최적 스케쥴 제어를 위해서는 난방부하 예측이 필요하다. 공동주택의 난방부하는 복잡한 변수들의 영향을 받기 때문에 손쉬운 난방부하 예측을 위해 사용하기 쉬우며 효용성 있는 예측방법의 개발이 필요하다. 본 연구에서는 익일의 시간별 난방부하를 예측하기 위해 단순화된 외기조건 예측방법과 부하 예측방법을 제안하였다. 난방부하 예측을 위해 건물설계서에서 쉽게 얻을 수 있는 간단한 사양과 예측된 온습도가 사용되었다. 제안된 방법의 타당성을 검증하기 위해 지역난방 시스템으로부터 시간별로 실측된 난방부하와 예측된 결과를 비교하였다. 예측된 외기조건은 실측된 값과 비교하여 변화양상이 잘 일치하였다. 예측된 난방부하와 측정된 난방부하를 비교한 결과, 시간별, 일별, 월별 모두 예측과 실측이 비교적 잘 일치하였으며, 난방기간 동안 월별 부하의 평균 오차는 약 4.68%로 비교적 작은 값을 가졌다. It is necessary to predict the heating load in order to determine the optimal scheduling control of district heating systems. Heating loads are affected by many complex parameters, and therefore, it is necessary to develop an efficient, flexible, and easy to use prediction method for the heating load. In this study, simple specifications included in a building design document and the estimated temperature and humidity are used to predict the heating load on the next day. To validate the performance of the proposed method, heating load data measured from a benchmark district heating system are compared with the predicted results. The predicted outdoor temperature and humidity show a variation trend that agrees with the measured data. The predicted heating loads show good agreement with the measured hourly, daily, and monthly loads. During the heating period, the monthly load error was estimated to be 4.68%.
김태호(Tae-Ho Kim),유성연(Seong-Yeon Yoo),한규현(Kyu-Hyun Han),강형철(Hyoung-Chul Kang),윤홍익(Hong-Ik Yoon) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
To estimate the building energy consumption, solar insolation data are used in conjunction with temperature and humidity. A reliable and simple method to predict the clearness index of decomposition model for solar insolation are proposed. Sensitivity analysis for factors affecting the clearness index are performed, and the sky condition and relative humidity are found to be most influential. An artificial neural network as well as conventional polynomial equation are used to find the relation between the clearness index and the factors, and results are compared. The predicted data of horizontal solar insolation show good agreement with the measured data.
김명호(Myung-Ho Kim),유성연(Seong-Yeon Yoo),김태호(Tae-Ho Kim),김강식(Kang-Sic Kim),강형철(Hyung-Chul Kang),윤홍익(Hong-Ik Yoon),박준택(Jun-Taik Park) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
A wall-integrated ventilation systems were developed to supplement the weakness of a conventional floor-standing type or ceiling type ventilation system, and their heat recovery rates were investigated. Two types of plastic heat exchangers, square dimple and hexagon-corrugated, were used in this study. The effectiveness of the heat exchangers and heat recovery rates of the ventilation systems were measured and compared in the actual weather conditions. The effectiveness of each heat exchanger was almost constant during a day, but the heat recovery rates are varied remarkably depending on the outdoor temperature.