• Title, Summary, Keyword: 공기압 실린더

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Synchronous Position Control of Pneumatic Cylinder Driving Apparatus (공기압 실린더 구동 장치의 위치 동기 제어)

  • Jang, Ji-Seong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.28 no.9
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    • pp.1415-1421
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    • 2004
  • In this study, a position synchronous control algorithm applied to two-axes pneumatic cylinder driving apparatus is proposed. The position synchronous control algorithm is composed of position controller and synchronous controller. The position controller is designed to minimize the effect of several nonlinear characteristics peculiar to the pneumatic cylinder driving apparatus on position control performance. The synchronous controller is designed to reduce the synchronous error. The effectiveness of the proposed control algorithm is proved by experimental results.

Synchronous Position Control of Pneumatic Cylinder Driving Apparatus (공기압 실린더 구동 장치의 위치 동기 제어)

  • Jang, Ji-Seong
    • Proceedings of the KSME Conference
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    • pp.762-767
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    • 2004
  • In this study, a position synchronous control algorithm being applied to two-axes pneumatic cylinder driving apparatus is proposed. The position synchronous control algorithm is composed of position controller and synchronous controller. The position controller is designed to minimize the effect of several nonlinear characteristics of the driving apparatus. The synchronous controller is designed to reduce the synchronous error. The effectiveness of the proposed controller is proved by simulation results.

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Position Synchronous Control of Two Axes Pneumatic Cylinder Driving Apparatus (2축 공기압 실린더 구동장치의 위치 동기 제어)

  • Jang, J.S.
    • Journal of the Korea Society For Power System Engineering
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    • v.8 no.4
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    • pp.24-30
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    • 2004
  • In this study, a position synchronous control algorithm applied to two-axes pneumatic cylinder driving apparatus is proposed. The position synchronous control algorithm is composed of position controller and synchronous controller. The position controller is designed to minimize the effect of several nonlinear characteristics peculiar to the pneumatic cylinder driving apparatus on position control performance. The synchronous controller is designed to reduce the synchronous error. The effectiveness of the proposed controller is proved by simulation results.

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Analysis of a Low Friction Piston Seal in Pneumatic Cylinders (공기압 실린더용 저마찰 피스톤 실의 특성해석)

  • Kim, D.T.;Zhang, Z.J.
    • Transactions of The Korea Fluid Power Systems Society
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    • v.8 no.3
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    • pp.21-26
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    • 2011
  • 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 seals in high speed pneumatic cylinders is analyzed by nonlinear finite element analysis using ABAQUS. The contact pressures, stress and strain distributions and frictional forces of the squeeze type piston seal are simulated with variation of the seal radial installed interference, the operating pressures, friction coefficients and piston rod velocities. The nonlinear finite element model of the squeeze type piston seal is used to predict deformation of a seal, friction force and contact pressure distributions.

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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    • 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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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 Cushion Mechanism with Relief Valve for High-Speed Pneumatic Cylinders (고속 공기압 실린더용 릴리프밸브형 쿠션기구의 특성 해석)

  • Kim, Do-Tae;Zhang, Zhong Jie
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.3
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    • pp.95-103
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    • 2010
  • This paper presents a simulation model of a double-acting high-speed pneumatic cylinder with a relief valve type cushion mechanism. The model predicts piston motion, mass flow rate, pressure and temperature time histories of cushion chamber. Of interest here is to investigate the cushioning effect of varying the piston and piston-rod diameter, cushion ring diameter and length, and stoke in cushion mechanism. As a result, this cushion mechanism is found to be adequate under high-speed driving of pneumatic cylinders. The simulation model proposed here will be very useful to analyze the dynamic characteristics and to improve or design the better cushion mechanism in high-speed pneumatic cushion cylinders.

Characteristic Comparison on Internal Cushion Devices at High-speed Pneumatic Cylinders (고속 공기압 실린더 내장용 쿠션기구의 특성 비교)

  • Kim, Dotae;Zhang, Zhong Jie
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.6
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    • pp.24-30
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    • 2013
  • This paper studies the comparative analysis on two different internal cushion devices (the types of needle and relief valve) used to absorb the energy which is generated when the pneumatic cylinder moves with the load at meter-out speed control system. The effect at varying the piston velocity under same driving condition is mainly investigated. The simulation results on pressure in the cushion chamber and the dynamic behavior of the relief valve type cushion device are compared with the needle valve type. Design and performance are improved with the cushion configuration of better quality at high-speed pneumatic cylinder. Based on the relation between absorbed energy and impact energy at cushion process, cushion performance at pneumatic cylinder is evaluated.