• Title, Summary, Keyword: Feeding System

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A Study on Slipping Phenomenon in a Media Transport System (급지 장치에서의 미끄러짐 현상에 대한 연구)

  • 유재관;이순걸;임성수;김시은
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.681-685
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    • 2004
  • A media-feeding (or media-transport) system is a key component in daily consumer systems such as printers, copiers and ATM's. The role of the media-transport system is to feed a medium, which is usually in the form of a thin film, to the main process in a uniform and repeatable manner. Even small slippage between the media and the feeding rollers could significantly degrade the performance of the entire system. The slippage between the medium and the feeding rollers is determined by many parameters which include the friction coefficient between the feeding rollers and the medium material, the angular velocity of the feeding rollers, and the normal force applied by feeding rollers on the medium. This paper investigates the effect of the normal force and the angular velocity of feeding rollers on the slippage of the medium. Authors have constructed a test bed for experiments, which consists of a feeding module and various measuring devices. Using regular paper as media being fed, the authors experimentally measured the slippage of the medium under various normal forces and angular velocities of driving feeding roller. Also the authors developed a novel two-dimensional simulation model for the media-transport system. The paper medium is modeled as a set of multiple rigid bodies interconnected by revolute joints and rotational springs and dampers. Simulations were executed using a multi-body dynamic analysis tool called RecurDy $n^{ⓡ}$. The slippage obtained by the simulation is compared to experimental results.ults.

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Test of KSR-III Rocket Propellant Feeding System Using PTA-II Test Facility (PTA-II 시험설비를 활용한 KSR-III Rocket 추진기관시스템 종합시험)

  • Kang Sun-il;Cho Sang-yoen;Kwon Oh-sung;Lee Jeong-ho;Oh Seung-hyup;Ha Sung-up;Kim Young-han
    • Proceedings of the KSME Conference
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    • pp.263-266
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    • 2002
  • The KSR-III developed by KARI is the first rocket vehicle which is adopting the liquid propellant rocket engine system in Korea. Not only the engine itself, but also the propellant feeding system is one of the most important component in liquid rocket vehicle. In this paper, the authors are intended to introduce the multi-purpose test facility(PTA-II Test Facility) which is constructed for the variety of tests on KSR-III feeding system(single component tests, verification tests, cold flow tests and combustion tests). With the results of these tests, we can identify the characteristics of rocket feeding system and decide the optimum setting values of feeding system for the successful flight.

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Evaluation of dry feeding and liquid feeding to lactating sows under high temperature environment

  • Hong, J.S.;Jin, S.S.;Jung, S.W.;Fang, L.H.;Kim, Y.Y.
    • Journal of Animal Science and Technology
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    • v.58 no.10
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    • pp.36.1-36.5
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    • 2016
  • Background: Liquid feeding system has been introduced to domestic swine farms, but negative cognition about liquid feeding system has been remained for feed waste decay related with poor management and microbial contamination. For these reasons, this study was conducted to evaluate the effects of feeding method in lactating sows. Methods: A total of 30 mixed-parity (average 4.13) lactating sows (Yorkshire ${\times}$ Landrace) with an initial BW of $218.8{\pm}19.5kg$ was used in a 3 week trial. Sows were allotted to 1 of 2 treatments in a completely randomized design by their body weight, backfat thickness, parity and alive litter weight. One of treatments was dry feeding and the other was liquid feeding (water to feed ratio, 1:1). Experimental diets contained 3265 kcal ME/kg, 12.6 % CP, 5.76 % EE, 1.09 % total lysine, 0.25 % total methionine, as fed basis. Results: Dry feeding treatment had high body weight loss rather than liquid feeding treatment (P = 0.04). Dry feeding treatment had tendency to increase litter weight at 21d of lactation (P = 0.06) and litter weight gain (P = 0.04) during lactation period (0-3 week). Sows fed dry feeding method made milk containing high content of casein and total solid rather than sows fed liquid feeding method (P = 0.04). In addition, dry feeding treatment had tendency to higher content of milk fat, protein and solid not fat on 21d of lactation (P = 0.07). Sows fed dry feeding type also showed higher milk energy content in milk of 21d lactation (P = 0.05). Furthermore, liquid feeding treatment showed high occurrence in feed waste during lactation period (P <0.01). Conclusion: Dry feeding method was more suitable feeding method to lactating sows under high temperature environment like lactating barn.

Pogo Analysis on the KSR-III Propulsion Feeding System (KSR-III 추진기관 공급계 pogo 해석)

  • Lee H.J.;Jung T.K.;Menshikova O. M.;Jung Y.S.;Cho I.H.;Oh S.H.;Seo K.S.
    • Proceedings of the KSME Conference
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    • pp.495-498
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    • 2002
  • This article deals with the introduction of longitudinal instability of liquid rocket (pogo) and the analytical results on the frequency responses of KSR-III propulsion feeding system. Both the stiffness of bellows and the cavitation volume of venturi affect the frequency response of the feeding system. Especially, bellows has a great roll to reduce the natural frequency of the feeding system. Also, oxidizer and fuel feeding systems of the KSR-III have natural frequencies of ${\~}280Hz\;and\;{\~}90Hz$, respectively.

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A Study on the Performance Improvement of Diesel Automobile Engine with Ultrasonic Fuel Feeding System(II)-On the Spray Characteristics and Engine Performance- (초음파 연료분사장치용 디젤자동차의 성능향상에 관한 연구(II)-분무특성과 기관성능에 대하여-)

  • Yang, J.K.;Jung, J.D.;Ryu, J. I.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.2 no.6
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    • pp.50-56
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    • 1994
  • This is an experimental study on the performance characteristics of Diesel Automobile with ultrasonic fuel feeding system. For this purpose, ultrasonic fuel feeding system was made and atomization characteristics was measured. Base on this result, carried out engine dynamometer test to investigate the performance characteristics of diesel automobile with ultrasonic fuel feeding system in comparison with conventional diesel fuel injector. The results are as follows. 1) In the spray characteristics test, fuel particle sizes were decreased about 11%~21%. 2) In engine dynamometer test, -The power was increased about 5%~11%. -The thermal efficiency was improved about 6%~11%. -The specific fuel consumption was improved about 6%~19%. -The smoke concentration was decreased about 11%~50%.

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An Analysis of Influence Between the Power Feeding Line Insulation and Negative Rail Potential for the DC Ground Fault Protection in the Rubber Wheel System (고무차륜시스템에서의 지락보호를 위한 급전선로 절연과 부극전위와의 영향 분석)

  • Jung, Hosung;Shin, Seongkuen;Kim, Hyungchul;Park, Young;Cho, Sanghoon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.4
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    • pp.577-583
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    • 2013
  • We have analyzed influence of potential rise in negative bus, which caused by decrease of power feeding line insulation, upon protecting method of DC ground protection device which detecting potential rise between negative bus and ground in order to detect ground fault in the rubber wheel system. For this purpose, we proposed negative potential equation between negative bus and ground and calculated negative potential according to system condition changes by estimating power feeding line insulation changes in steel wheel system and rubber wheel system, and equalizing DC power feeding system when ground fault occurred. Also, in order to estimate negative potential of real system, we modeled the rubber wheel system, and simulated normal status, grounding fault occurrence and power feeding line insulation changes. In normal status, negative potential did not rise significantly regardless of vehicle operation. When ground fault occurred, negative potential rose up over 300V regardless of fault resistance. However, we also observed that negative potential rose when power feeding line insulation dropped down under $1M{\Omega}$. In conclusion, our result shows that in case of rubber wheel system unlike steel wheel system, relay will be prevented maloperation and insulation status observation can be ensured when ground over voltage relay will be set 200V ~ 300V.

Graphics-Oriented CAD Developmen of Kinematic Analysis And Simwlation of An Automatic Feeding System By A Curvilinear Cam. Part II : Graphics-Oriented CAD Development (곡선 캠을 이용한 자동 이송장치의 기구 해석 및 Simulation용 Graphic-Oriented CAD 개발 2)

  • 신중호;류갑상;김상진
    • 제어로봇시스템학회:학술대회논문집
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    • pp.269-272
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    • 1987
  • This paper is concerned on kinematic analysis and simulation of an automatic feeding mechanism subjected by the motion of a curvilinear inverse cam. The main objection is the development of computer-aided design (CAD) program for simulating the motion of the cam-feeding mechanism using computer-graphics. A computer program CACAFS (Computer-Aided Cam and Automatic Feeding System) is independent of computer hardware used. The program is also interactive using a menu-selection technique. As the second part of the paper for the motion simulation of the cam-feeding system, this paper discusses the state-of-art for CAD. The first part of the paper presents the algorithm to simulate the notion of the cam-feeding mechanism.

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Development of Real-time Simultaneous Discharge Algorithm for Randomly Feeding Object (무작위 이송 개체용 실시간 동시 배출 알고리즘 개발)

  • Kim, S. C.;Hwang, H.
    • Journal of Biosystems Engineering
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    • v.24 no.2
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    • pp.145-152
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    • 1999
  • Methods of discharging each graded agricultural product are divided into two according to the type of feeding. One is based on feeding objects using a series of specially designed holders mounted with an equal interval. The other is randomly feeding objects while being isolated without a specific interval. In this paper, a real time simultaneous discharge algorithm, which is good for objects randomly fed individually and for multi-objects located along a series of discharge buckets, was developed. And the developed algorithm was implemented to the controller and the performance was verified using the system developed for dried mushrooms. The discharge system used for the experiment was composed of a variable speed conveyor, a series of double channel bucket mounted along both sides of the conveyor, and a series of air nozzles and optic sensors. Developed algorithm worked perfectly and could be directly used for automatic discharge system for randomly feeding agricultural products.

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Ubiquitous Integration Monitoring System for the Feeding and Environment Management of Livestock Production (가축 생산성 향상을 위한 유비쿼터스 통합 모니터링 시스템)

  • So, Sunsup;Kim, Byeongho;Eun, Seongbae;Jun, Jungho
    • Journal of Information Technology Services
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    • v.11 no.sup
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    • pp.75-88
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    • 2012
  • This research aims to propose a ubiquitous integration monitoring system for the feeding and environment management of livestock production. The integration monitoring system proposed in this research is based on an integrated platform, and consists of livestock shed environment monitoring system, livestock monitoring system, livestock remote medical treatment, and feeding and management system. This research conducts the followings. First, we review the previous researches on livestock related ubiquitous monitoring system to examine the factors to be considered in the proposed system. Then, we design the system and implement the prototype to demonstrate the possibility of the application of this system to real stockbreeding environment.

A Study on Characteristic of Power Conversion System in Electric Railway Vehicle According to Contact Loss in Feeding System Considering Characteristic of Rigid Bar (강체전차선로의 특성을 고려한 급전시스템에서 이선에 따른 철도차량 전력변환장치에 대한 특성에 관한 연구)

  • Jung, No-Geon;Lee, Hwan;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.3
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    • pp.520-525
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    • 2016
  • In this paper, Characteristic of power conversion unit of a railway vehicles according to contact loss in feeding system that applied impedance of rigid conductor is analyzed. It applied impedance of rigid bar in modeling of electric railway system. Railway vehicles are performed of modeling based on the performance of the electric railway vehicle. Effects of the contact loss in the power conversion unit were analyzed via main transformer of railway vehicle, the input and output voltage characteristics of the converter through contact loss was generated after linking the vehicle with feeding system.