708 Position Control of Water Hydraulic Cylinder by Water Hydraulic High Speed Solenoid Valve

Abstract The paper tests experimentally the suitability of inexpensive directly operated two-way solenoid valves for water hydraulic applications in the pressure range from 10 to 40 bars. Seven valves are tested and tested matters include the steady-state and dynamic characteristics as well as durability. Results show small delays and the durability of about ten million openings. The weak point of the valves is a small flow capacity but otherwise the valves are well suited for low-pressure water hydraulic applications. This is demonstrated by using them in a simple on/off position control of a water hydraulic cylinder.

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A Study on Noise and Flow Fluctuation Reduction of Water Hydraulic Two-Stage High Speed Solenoid Valve Using Leakage Flow around the Main Poppet as Pilot Flow

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.71.1498 ◽

2005 ◽

Vol 71 (705) ◽

pp. 1498-1505

Author(s):

Sung-Hwan PARK ◽

Ato KITAGAWA

Keyword(s):

High Speed ◽

Solenoid Valve ◽

Leakage Flow ◽

Two Stage ◽

Flow Fluctuation ◽

Water Hydraulic

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Proportional Position Control of Low-Pressure Water Hydraulic Cylinder

10.4271/2002-01-1379 ◽

2002 ◽

Cited By ~ 1

Author(s):

Harri Sairiala ◽

Matti Linjama ◽

Kari T. Koskinen ◽

Matti Vilenius

Keyword(s):

Position Control ◽

Hydraulic Cylinder ◽

Low Pressure ◽

Pressure Water ◽

Water Hydraulic

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Configuration and Optimal Control of Hydraulic/Pneumatic Hybrid Actuator with 2-DOF

Journal of Robotics and Mechatronics ◽

10.20965/jrm.2001.p0238 ◽

2001 ◽

Vol 13 (3) ◽

pp. 238-244

Author(s):

Atsushi Ohtomo ◽

◽

Yasuharu Sasaki

Keyword(s):

Optimal Control ◽

High Speed ◽

Position Control ◽

Control Method ◽

Hydraulic Cylinder ◽

Pneumatic Cylinder ◽

Large Power ◽

Optimal Control Method ◽

Hybrid Actuator ◽

Stable Control

A pneumatic actuator outputs large power in proportion to weight and can be installed in an inexpensive, light and compact configuration. From the standpoint of controllability, however, it is weak due to nonlinearity by compression and delayed transfer of air, it has a problem of poor accuracy in position control. To solve such problem, we propose a hydraulic/pneumatic hybrid actuator that has a pneumatic cylinder and hydraulic cylinder in parallel and uses the hydraulic cylinder as damper. We demonstrate that it can be used in practice and structurally applying it to a manipulator with 2-DOF. It also demonstrates that high-speed and stable control can be achieved by applying optimal control method.

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Sliding mode tracking control of a low-pressure water hydraulic cylinder under non-linear friction

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1177/095965180221600502 ◽

2002 ◽

Vol 216 (5) ◽

pp. 383-392 ◽

Cited By ~ 1

Author(s):

S H Cho ◽

M Linjama ◽

H Sairiala ◽

K T Koskinen ◽

M Vilenius

Keyword(s):

Tracking Control ◽

Position Control ◽

Sliding Mode ◽

Hydraulic Cylinder ◽

Low Pressure ◽

Non Linear ◽

Linear Friction ◽

Pressure Water ◽

Water Hydraulic ◽

Mode Tracking

This paper deals with a robust motion control of a low-pressure water hydraulic cylinder under non-linear friction. In order to ensure good tracking performance as well as to guarantee robustness, the sliding mode tracking control is utilized in combination with a non-linear friction compensator. Application of the scheme to a low-pressure water hydraulic cylinder position control has led to a significant reduction in tracking error when compared with the perfect tracking control scheme.

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