• Title/Summary/Keyword: 유공압

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A Study on the Modeling of a Position Control System with a Pneumatic Cylinder Considering Transfer Characteristics of a Transmission Line (전달 관로의 전달특성을 고려한 공기압 실린더 구동장치의 모델링에 관한 연구)

  • Kang B.S.;Jang J.S.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.1 no.2
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    • pp.20-25
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    • 2004

  • In this study, a position control characteristics of pneumatic cylinder with transmission line is analyzed. Dynamic characteristics of transmission line using compressible fluid is changed by the flowing stiles of the fluid the diameter and the length of the line. But, the effect of the change of dynamic characteristics of transmission line by the flowing states on the position control characteristics can be neglected because of the friction force of the pneumatic cylinder. So, We assume that the position control characteristics is affected by the diameter and length of the transmission line. The experimental results according to the change of parameter of the transmission line show that the relation between the parameter of the transmission line and the position control characteristics of pneumatic cylinder driving system with the transmission line.

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Analysis of Piston Seal in High-Speed Pneumatic Cylinders (고속 공기압 실린더의 피스톤 실 특성 해석)

  • Zhang, Z.J.;Kim, D.T.;Han, S.S.
    • 유공압시스템학회:학술대회논문집
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    • 2010.06a
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    • pp.99-104
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    • 2010

  • Nonlinear seal friction in pneumatic cylinders can impede the performance of pneumatic systems designed for high precision positioning with favorable high speed actuation. The behaviour of an elastomeric piston seal in high speed pneumatic cylinders is analysed by nonlinear finite element analysis using ABAQUS. The contact pressures, stress and strain distributions and frictional forces of the piston seal are simulated with variation of interference fits, supply pressures, friction coefficients and piston rod velocities. The nonlinear finite element model of the piston seal is used to predict deformation of a seal, friction force and contact pressure distributions.

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Analysis of I-P Curve Characteristics by the temperature of Solenoid Valve for Automatic Transmission (자동변속기 SOLENOID 밸브의 온도에 의한 전류(I)-제어압(P)특성 분석)

  • Choi, Y.Y.;Seo, S.H.;Lee, S.H.;Yang, H.S.
    • 유공압시스템학회:학술대회논문집
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    • 2010.06a
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    • pp.7-11
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    • 2010

  • Various transmission technologies have been developed to satisfy environmental issues recently. Especially, the technology of the proportional control solenoid valve (PCSV) to ensure high level performance by electronic control has been studied. This study builds an analysis process for designing of the PCSV and characteristic predictions.

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The Analysis of Discharge Pressure Noise Characteristics Of Vane Pump for Automatic Transmission (자동변속기용 베인펌프의 토출압 노이즈 특성 해석)

  • Choi, Y.Y.;Choi, H.J.;Lee, S.H.;Jung, W.J.
    • 유공압시스템학회:학술대회논문집
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    • 2010.06a
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    • pp.33-38
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    • 2010

  • As for an oil hydraulic vane pump of vehicle hydraulic systems, the highest of planning technique required by the acquisition of optimum profile data which can be available to predict noises and vibrations. Pressure pulsation may result in considerable vibration and noise of pump component as well as cavitation in hydraulic system. The influences of the discharge pressure and rotating speed of the vane on the dynamic pressure in chamber surrounding a vane have been investigated. It is very important to predict pressure pulsation in vane pump. This paper presents analysis of technique of vane pump for automatic transmission. The predicted result using AMESim model were good agreement with the experimentally obtained results.

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