APPLICATION OF FUZZY GAIN-SCHEDULING IN POSITION CONTROL OF A SERVO HYDRAULIC SYSTEM WITH A FLEXIBLE LOAD

Authors

  • Hassan Yousefi 1Institute of Mechatronics and Virtual Engineering, Department of Mechanical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland
  • Heikki Handroos Institute of Mechatronics and Virtual Engineering, Department of Mechanical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland
  • Jorma K. Mattila Laboratory of Applied Mathematics, Department of Information Technology, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland

Keywords:

servo hydraulic, fuzzy controller, reference model, position control

Abstract

The control of hydraulic servo-systems has been the focus of intense research over the past decades. Hydraulic position servos with an asymmetrical cylinder are commonly used in industry. These kinds of systems are nonlinear in nature and generally difficult to control. Changing system parameters using the same gains will cause overshoot or even loss of system stability. The highly non-linear behaviour of these devices makes them ideal subjects for applying different types of sophisticated controllers. The paper is concerned with a second order model reference to positioning control of a flexible load servo-hydraulic system using fuzzy gain-scheduling. In the present study, to compensate the lack of damping in a hydraulic system, an acceleration feedback was used. To compare the results, a p-controller with feedforward acceleration and different gains in extension and retraction is used. The design procedure for the controller and experimental results are discussed. The results suggest that using the fuzzy gain-scheduling controller decrease the error of position reference tracking.

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Author Biographies

Hassan Yousefi, 1Institute of Mechatronics and Virtual Engineering, Department of Mechanical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland

Hassan Yousefi Was born in Tehran, Iran in 1973. He received his B.S. (1997) and M.Sc. (2000) degrees in Mechanical Engineering from Sharif University of Technology and Tehran University, respectively. Since October 2003, he has been senior researcher of Institute of Mechatronics and Virtual Engineering at Lappeenranta University of Technology. He is PhD Candidate at Department of Mechanical Engineering and he has about 15 Journal and Conference papers.

Heikki Handroos, Institute of Mechatronics and Virtual Engineering, Department of Mechanical Engineering, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland

Heikki Handroos Professor of Machine Automation, Head of Institute of Mechatronics and Virtual Engineering, Lappeenranta University of Technology since 1993. He obtained his M.Sc and D.Sc Degrees in IHA, Tampere University of Technology, 1985 and 1991. He has been involved in research including modelling and simulation of mechatronics machines, intelligent and robust control of servo drives and flexible serial and parallel manipulators. He has published about 150 scientific papers.

Jorma K. Mattila, Laboratory of Applied Mathematics, Department of Information Technology, Lappeenranta University of Technology, P.O. Box 20, FIN-53851, Lappeenranta, Finland

Jorma K. Mattila was born in Akaa, Finland in 1944. Professor of Dept. Appl. Math., Head of Fuzzy Systems Research Group at Lappeenranta University of Technology. His works consist of logic and fuzzy sets. The special topic is modifiers and their logic. The research results were presented in many international congresses and published in international journals and collection books. He is member IFSA Concil (2002- 2006) and past president of NSAIS.

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Published

2007-08-01

How to Cite

Yousefi, H., Handroos, H., & Mattila, J. K. (2007). APPLICATION OF FUZZY GAIN-SCHEDULING IN POSITION CONTROL OF A SERVO HYDRAULIC SYSTEM WITH A FLEXIBLE LOAD. International Journal of Fluid Power, 8(2), 25–35. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/540

Issue

2007: Vol 08 Iss 2

Section

Original Article