• Title/Summary/Keyword: Automatic Convergence Study

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A Study on the Influence of Automatic Control System on the Production of Chemical Propylene (자동제어 시스템이 케미칼 프로플린 생산에 미치는 영향 연구)

  • Lee, Oh Sick;Leem, Choon Seong
    • Journal of Convergence for Information Technology
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    • v.9 no.2
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    • pp.34-42
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    • 2019
  • In this study, we analyzed the effects of the automatic control system on the reactor operation. The Propyrene Reactor process is complex and typically is inefficient and costly due to the lack of productivity. In this study, a research model was presented with the aim of supplementing obstacles to enhance operational efficiency and increase productivity. The configuration of the existing processes was analyzed to complement the hardware and software systems with original models. The composition of the facility is applied to eight reactor units producing 600,000 ton/year propylene per year. As a result of applying the research model, efficiency of operation was increased, and production volume increased from 90 to 95%, along with 91% Reliability. Future studies will present a research model to improve productivity by 100 percent. In addition, we will study the stability and productivity improvement of PSA (Pressure Swing Adsorption) systems, which are the hydrogen production process of propylene by-products.

A Study on the Automatic Sheet Exchanger for a Hospital Bed (의료용 침대를 위한 자동 시트 교환 장치 연구)

  • Lee, Youngdae;Choi, Moonsoo;Kim, Changyoung;Chang, Changjun;Choi, Young;Eom, Giyeong
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.4
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    • pp.361-366
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    • 2019
  • Exchanging sheets for patients is one of the worst and one of the factors that makes the nursing environment difficult. Many beds with various functions for the patient have already been developed, but there is no device for automatically changing the sheets. In this study, we developed and tested the first automatic sheet changer for a medical bed and verified its performance. The developed automatic seat changer uses a torque limiter to properly adjust tension and exchange a dirty sheet and a new seat at the same time. The designed automatic sheet changer was experimentally confirmed to be properly operated and installed in a integrated multi-functional bed with bed sores prevention and automatic patient transfer functions.

A Study on Radion Frequency of the Transponder System for High-speed and High-precision Train Location Detection (고속열차 위치검지를 위한 트랜스폰더 시스템 운용 주파수 연구)

  • Ahn, Il-Yeop;Sung, Nak-Myoung;Kim, Jaeho;Choi, Sung-Chan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.1
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    • pp.237-242
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    • 2017
  • This paper presents development of the transponder system which provides an accurate train position, especially for supporting 400km/h high speed train. Here, we analyzed an operating frequency band of the transponder system which can be interoperable with the Eurobalise system already installed in Korea railroad as to be used for the automatic train protection (ATP). By investigating the power frequency band and its data frequency band of the transponder system, we presents the adoptable frequency band for the developed transponder system. Additionally, through the real testbed using HEMU-430X, we evaluate its performance requirement and shows interoperable operation with the Eurobalise system.

Capturing Distance Parameters Using a Laser Sensor in a Stereoscopic 3D Camera Rig System

  • Chung, Wan-Young;Ilham, Julian;Kim, Jong-Jin
    • Journal of Sensor Science and Technology
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    • v.22 no.6
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    • pp.387-392
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    • 2013
  • Camera rigs for shooting 3D video are classified as manual, motorized, or fully automatic. Even in an automatic camera rig, the process of Stereoscopic 3D (S3D) video capture is very complex and time-consuming. One of the key time-consuming operations is capturing the distance parameters, which are near distance, far distance, and convergence distance. Traditionally these distances are measured by tape measure or triangular indirect measurement methods. These two methods consume a long time for every scene in shot. In our study, a compact laser distance sensing system with long range distance sensitivity is developed. The system is small enough to be installed on top of a camera and the measuring accuracy is within 2% even at a range of 50 m. The shooting time of an automatic camera rig equipped with the laser distance sensing system can be reduced significantly to less than a minute.

A Study on the Optimum Convergence Factor for Adaptive Filters (적응필터를 위한 최적수렴일자에 관한 연구)

  • 부인형;강철호
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.31B no.7
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    • pp.49-57
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    • 1994
  • An efficient approach for the computationtion of the optimum convergence factor is proposed for the LMS algorithm applied to a transversal FIR structure in this study. The approach automatically leads to an optimum step size algorithm at each weight in every iteration that results in a dramatic reduction in terms of convergence time. The algorithm is evaluated in system identification application where two alternative computer simulations are considered for time-invariant and time-varying system cases. The results show that the proposed algorithm needs not appropriate convergence factor and has better performance than AGC(Automatic Gain Control) algorithm and Karni algorithm, which require the convergence factors controlled arbitrarily in computer simulation for time-invariant system and time-varying systems. Also, itis shown that the proposed algorithm has the excellent adaptability campared with NLMS(Normalized LMS) algorithm and RLS (Recursive least Square) algorithm for time-varying circumstances.

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A Study on the Safety Control System of Child Care Systems Using Interior Lighting and Entry Systems

  • Joo, Dae-Chul;Kwon, Mee-Rhan;Shin, Seung-Jung
    • International Journal of Internet, Broadcasting and Communication
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    • v.9 no.1
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    • pp.42-49
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    • 2017
  • Despite the government's various safety measures, the number of safety accidents continues to rise and the interior is more likely to occur indoors than outdoors. Safety accidents involving young children account for more than 70 % of the safety accidents in the safety accidents, and the ratio of safety accidents in the classroom or classroom is more than 50 %. In this thesis the author proposes the system managing the accidents notification service using LED lighting and access entry control. Utilizing IoT technology, remote control or access can be controlled remotely by controlling multiple lights and entrances from each room and by means of a number of lighting and entrances. By monitoring and analyzing real-time status via server PC and mobile interface, it can control the maximum control and incident prevention, automatic control, and automatic control.

A Study for Design of Fuzzy Controller with the Automatic Adjustment of Scale Factors (스케일 계수를 자동조정하는 퍼지제어기 설계에 관한 연구)

  • 이상윤;신위재
    • Journal of the Institute of Convergence Signal Processing
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    • v.3 no.4
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    • pp.42-48
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    • 2002
  • The case that cannot show the satisfactory control results with a modeling error and a shortage of related knowledge about a plant is if a fuzzy controller designed based on the plant model or the experience applies to an actual plant. We must adjust the scale factor which is a controller again in order to improve control performance in case of this and needs a lot of time and costs because this regulation process is carried out with a trial and error way We proposes the fuzzy controller that an automatic control adjust scale factors according to fuzzy logic and normalizer in this paper We confirmed that an automatic adjusted fuzzy controller displayed good performance than the fuzzy controller that scale factors was fixed through simulation. We implemented the controller using the DSP processor and applied in a hydraulic servo system. And then we observed an experimental results.

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A Study on the Standard Roughness for SUS440C Internal Diameter Machining Using a CNC Automatic Lathe (CNC 자동선반을 이용한 SUS440C 안지름 가공에 대한 표준 거칠기에 관한 연구)

  • Chul-Woong Choi;Sik-Won Choi
    • Journal of the Korean Society of Industry Convergence
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    • v.26 no.4_2
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    • pp.605-613
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    • 2023
  • The multi-axis combined machining technology has enabled combined machining, which was difficult. However, the reality is that manufacturing costs are rising due to expensive equipment and there is a shortage of machine operation engineers. The purpose of this research is to present the optimum cutting conditions for the surface roughness when processing the inner diameter of SUS440C, which is an egg material, using a CNC automatic lathe. As a result of measuring the surface roughness, dry machining was the best at Ra0.481㎛ at a spindle speed of 4,000rpm, a feed rate of 0.05rev/min, and a cutting depth of 0.3mm. In wet machining, the highest value was Ra0.317 at a spindle speed of 2,000 rpm, a feed rate of 0.05 rev/min, and a cutting depth of 0.2 mm. The lower the feed rate, the better surface roughness appears. It was found that the feed rate had more influence than the number of revolutions and depth of cut.

A Study on an Automatic Multi-Focus System for Cell Observation

  • Park, Jaeyoung;Lee, Sangjoon
    • Journal of Information Processing Systems
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    • v.15 no.1
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    • pp.47-54
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    • 2019
  • This study is concerned with the mechanism and structure of an optical microscope and an automatic multi-focus algorithm for automatically selecting sharp images from multiple foci of a cell. To obtain precise cell images quickly, a z-axis actuator with a resolution of $0.1{\mu}m$ was designed to control an optical microscope Moreover, a lighting control system was constructed to select the color and brightness of light that best suit the object being viewed. Cell images are captured by the instrument and the sharpness of each image is determined using Gaussian and Laplacian filters. Next, cubic spline interpolation and peak detection algorithms are applied to automatically find the most vivid points among multiple images of a single object. A cancer cell imaging experiment using propidium iodide staining confirmed that a sharp multipoint image can be obtained using this microscope. The proposed system is expected to save time and effort required to extract suitable cell images and increase the convenience of cell analysis.

A Study on the Generative Structure of the Meaning and the Binary-Opposition in the Convergence of Fashion Design and Technology as a Emotional Method - Focused on Fashion Design Collections - (감성적 도구로서의 테크놀로지와 패션디자인의 융합에 나타난 이항대립과 의미생성구조 - 패션디자인 컬렉션을 중심으로 -)

  • Lee, Jee Hyun;Kim, Jieun;Ryu, Lim Jeong
    • Journal of the Korean Society of Costume
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    • v.63 no.7
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    • pp.134-147
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    • 2013
  • Today, the convergence of fashion design and digital technology has become a popular method and accordingly been tried variously in the fashion area. This study aimed to analyze the character of the collaboration with fashion and technology, and the meaning of technology as emotional expression methods. Selected designer's collections, literature and other related studies were reviewed in order to analyze the generative structure of the meaning and the binary-opposition in the convergence of body, fashion design and technology. Literatures and selected designer's collections were reviewed and quantitatively studies were performed to classify the convergence of human bodies, fashion design and technology through Greimas Semiotics rectangle based on binary-opposition of meaning and isotophy analysis. The research presents three types of fashion technology methods: mechanical movement, light/digital media, and virtual image. The convergence of fashion and technology was classified as the direct convergence and the indirect convergence. The direct convergence was characterized by variability and has automatic, independent movement, but the indirect convergence was shown closed and to have contradistinctive images.