ACCURATE TRAJECTORY TRACKING CONTROL OF WATER HYDRAULIC CYLINDER WITH NON-IDEAL ON/OFF VALVES

Authors

  • Matti Linjama Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland
  • Kari T. Koskinen Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland
  • Matti Vilenius Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland

Keywords:

Pulse Code Modulation, On/Off Control, Tracking Control

Abstract

The aim of the work is to develop an on/off valve based trajectory tracking control solution without fast and/or continuous switching of valves. The pulse code modulation method is used to realise stepwise control of inflow and outflow of the actuator. Both inflow and outflow paths have five parallel-connected two-way solenoid valves, each having different flow capacity according to binary series, and a four-way on/off valve is used for changing direction of movement. Cost function based open-loop and closed-loop control solutions are developed and it is demonstrated how the cost function weights can be used to find a reasonable trade-off between tracking performance and pressure surges. Closed-loop results show accurate and reasonably smooth position tracking and simultaneous pressure level control. Achieved control performance is close to that of water hydraulic servo systems.

Downloads

Download data is not yet available.

Author Biographies

Matti Linjama, Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland

Matti Olavi Linjama (Born 4th July 1971) is Academy Research Fellow and works at the Institute of Hydraulics and Automation (IHA), Tampere University of Technology (TUT), Finland. He graduated as Dr. Tech. in 1998. His current research focuses on development of advanced water and oil hydraulic on/off control systems.

Kari T. Koskinen, Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland

Kari Tapio Koskinen (Born 30th June 1962) is Professor of Fluid Power at Institute of Hydraulics and Automation (IHA), Tampere University of Technology (TUT), Finland. He graduated as Dr. Tech. in 1996. Since 1986 he has been acting in many kinds of R&D positions inside and outside TUT. Since 1998 he has been the leader of Water Hydraulics Research Group in IHA. He has published about 70 technical and scientific papers.

Matti Vilenius, Institute of Hydraulics and Automation, Tampere University of Technology, P.O. BOX 589, FIN-33101, Tampere, Finland

Matti Juhani Vilenius (Born 25th March 1948) is Professor and Head of Institute of Hydraulics and Automation (IHA) at Tampere University of Technology (TUT), Finland. He graduated as Dr. Tech. in 1980. Since 1971 he has been acting in many kinds of R&D positions inside and outside TUT. He has long experience as an academic level teacher and supervisor as well as an organizer of international conferences. He has published about 200 technical and scientific papers.

References

Bower, J. 1961. Digital Fluid Control System. US Patent

No. 2999482.

Cho, S. H., Linjama, M., Sairiala, H., Koskinen, K.

T. and Vilenius, M. 2002. Sliding Mode Tracking

Control of a Low-Pressure Water Hydraulic Cylinder

Under Non-Linear Friction. Journal of Systems

and Control Engineering (Proceedings of the Institution

of Mechanical Enngineers, Part I), Vol. 216,

No. I5, pp. 383–392.

Hyvönen, M., Koskinen, K. T., Lepistö, J. and Vilenius

M. J. 1997. Experiences of Using Servo

Valves with Pure Tap Water. The Fifth Scandinavian

International Conference on Fluid Power. Linköping

University, Sweden, Vol. 2, pp. 21–32.

Koskinen, K. T., Mäkinen, E., Vilenius, M. J. and

Virvalo, T. 1996. Position Control of a Water Hydraulic

Cylinder. The Third JHPS International

Symposium on Fluid Power, The Japan Hydraulics

and Pneumatics Society, Japan, pp. 43–48.Laamanen, A., Linjama, Tammisto, J., Koskinen, K.

T. and Vilenius, M. 2002. Velocity Control of Water

Hydraulic Motor. The Fifth JFPS International

Symposium on Fluid Power, The Japan Fluid Power

System Society, Japan, pp. 167–172.

Linjama, M., Tammisto, J., Koskinen, K. T. and

Vilenius, M. 2000a. Two-Way Solenoid Valves in

Low-Pressure Water Hydraulics. Fluid Power Systems

and Technology, The 2000 ASME International

Mechanical Engineering Congress and Exposition,

The American Society of Mechanical Engineers,

NY, USA, pp. 55–60.

Linjama, M., Koskinen, K.T. and Vilenius, M.

b. Suppression of pressure transients in on/off

control of low-pressure water hydraulic cylinder.

Bath Workshop on Power Transmission and Motion

Control (PTMC2000), University of Bath, UK, pp.

–212.

Linjama, Koskinen, K. T. and Vilenius, M. 2002.

Pseudo-Proportional Position Control of Water Hydraulic

Cylinder Using On/Off Valves. The Fifth

JFPS International Symposium on Fluid Power,

The Japan Fluid Power System Society, Japan, pp.

–160.

Liu, R., Wang, X., Tao, G. and Ding, F. 2001. Theoretical

and Experimental Study on Hydraulic Servo

Position Control System with Generalization Pulse

Code Modulation Control. The Fifth International

Conference on Fluid Power Transmission and Control

(ICFP’2001), Zhejiang University, China, pp.

–179.

Miyata, K., Yokota, S. and Hanufusa, H. 1991. Control

of Pneumatic Drive Systems by Using PCM

Valves. FLUCOME’91, The American Society of

Mechanical Engineers, NY, USA, pp. 373–378.

Mäkinen, E. and Virvalo, T. 2001. On the Motion

Control of a Water Hydraulic Servo Cylinder Drive.

The Seventh Scandinavian International Conference

on Fluid Power, Linköping University, Sweden, pp.

–123 (Vol. 1).

Sanada, K. 2002. A Method of Designing a Robust

Force Controller of a Water-Hydraulic Servo System.

Journal of Systems and Control Engineering

(Proceedings of the Institution of Mechanical Enngineers,

Part I), Vol. 216, No. I2, pp. 135–141.

Takahashi, T., Yamashina, C., and Miyakawa, S.

Development of Water Hydraulic Proportional

Control Valve. Fourth JHPS International Symposium

on Fluid Power, The Japan Hydraulics and

Pneumatics Society, Japan, pp. 549–554.

Virvalo, T. 1978. Cylinder Speed Synchronization.

Hydraulics & Pneumatics, Dec 1978, pp. 55–57.

Downloads

Published

2003-03-01

How to Cite

Linjama, M., Koskinen, K. T., & Vilenius, M. (2003). ACCURATE TRAJECTORY TRACKING CONTROL OF WATER HYDRAULIC CYLINDER WITH NON-IDEAL ON/OFF VALVES. International Journal of Fluid Power, 4(1), 7–16. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/611

Issue

2003: Vol 04 Iss 1

Section

Original Article

Most read articles by the same author(s)

1 2 > >>