MOTION SYNCHRONIZATION ENHANCEMENT OF HYDRAULIC SERVO CYLINDERS FOR MOULD OSCILLATION

Authors

  • Saad Kassem Professor, Dept. of Mechanical Design & Production, Faculty of Engineering, Cairo University, Egypt
  • Taher Salah El-Din Ph.D. Student, Faculty of Engineering, Cairo University and Manager at EZDK Co. at Alexandria, Egypt
  • Siegfried Helduser Professor, Institute for Fluid power, TU Dresden, Germany

Keywords:

synchronization, hydraulic, servo, cylinder, cross coupling control, fuzzy logic, simulation, plant measurements

Abstract

A cross coupling control technique (CCC) with a fuzzy logic controller (FLC) is proposed in this work to improve motion synchronization of the two hydraulic servo cylinders used to oscillate the heavy mould of a continuous casting machine. A mathematical model is resented for the system frequently used in industry in which each servo controlled cylinder is driven independently in an accurate closed loop control system. The model validity is verified by comparing results of numerical simulations for mould oscillations using the model, with actual measurements recorded in a steel plant. Effect of disturbances on motion synchronization is depicted theoretically using the mathematical model. A fuzzy logic controller which reduces synchronization errors in cylinders positions to practically acceptable values is proposed and theoretically verified. Measurements carried out on a continuous casting machine in a steel plant confirmed the merits of using the proposed CCC in reducing the synchronization errors resulting from different disturbances.

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Author Biographies

Saad Kassem, Professor, Dept. of Mechanical Design & Production, Faculty of Engineering, Cairo University, Egypt

Saad Kassem Born in January 1946 in Cairo (Egypt) he received his B.Sc. degree in 1967and M.Sc. degree in 1971 in Mechanical Engineering from the Faculty of Engineering, Cairo University. He got his Ph.D. degree in Fluid Power in 1977 from the Faculty of Mechanical Engineering, CVUT, Prague, Czechoslovakia. He worked since 1967 at the Faculty of Engineering, Cairo University as an Assistant, Assistant Prof., Associate Prof., and since 1987 as Professor of System Dynamics and Control. During the periods 1992 – 1995 and 2004 – 2007 he worked in industry in Saudi Arabia. He is the author and interpreter of two books (in Arabic) and more than 30 training manuals and handouts (in Arabic and English) in Fluid Power for more than 400 training programs and courses he designed and conducted for engineers and technicians working at different industries and contracting companies in Arab countries. His research areas cover development, modeling and simulation of hydraulic and pneumatic components and systems. He has several patents and published more than 40 papers in international journals and conferences.

Taher Salah El-Din, Ph.D. Student, Faculty of Engineering, Cairo University and Manager at EZDK Co. at Alexandria, Egypt

Taher Salah EL-Din Born in 1971 in Alexandria, Egypt. He got his B.Sc. in Mechanical Engineering in 1993 from the Faculty of engineering, Alexandria University and Dipl.-Ing. degree in Fluid power in 2001 from TU Dresden, Germany. He worked as Hydraulics maintenance engineer since 1994 and as the Project manager of the Electro-Hydraulic Center (EHC) during the period from 2004-2009, at EZDK Steel Co., Alexandria. He got his Ph.D. degree in Fluid Power in 2010 from the Faculty of Engineering, Cairo University. He is currently the manager of the EHC and a part-time lecturer at the German University in Cairo. His research interests are modeling and simulation of hydraulic systems.

Siegfried Helduser, Professor, Institute for Fluid power, TU Dresden, Germany

Siegfried Helduser Born in August 1944 in Remscheid, Germany, received his higher education at the Faculty of Mechanical Engineering of the RWTH Aachen and graduated there to Dr.-Ing. in 1977. The topic of his Doctoral Thesis is: Influence of elasticity of mechanicalstructural elements on the dynamic performance of electrohydraulic servo systems. From 1980 until 1993 he was employed in industry. For about 10 years he joined company “Vickers Systems GmbH”, Bad Homburg, Germany, a subsidiary of Vickers, Troy, Michigan, USA. His last position was: Director Technology Development, Europe. On 1st August 1993 he was appointed to the Technical University Dresden as Professor for Hydraulics and Pneumatics and in 1997 he was promoted to Director of the newly founded “Institute of Fluid Power” to foster growth and recognition of Fluid Power. Siegfried Helduser retired in March 2010. Since then he supports selected research activities and industrial projects. Since 2010 he is advisor to the board of Trustees of the German University in Cairo (GUC), Egypt, to develop education and research especially in Mechatronics in the Faculty of Engineering & Materials Science of the GUC. He is fellow of the Borchers Plakette (Borchers Medal), RWTH Aachen, and of the IMechE Joseph Bramah Medal.

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Published

2013-03-01

How to Cite

Kassem, S., El-Din, T. S., & Helduser, S. (2013). MOTION SYNCHRONIZATION ENHANCEMENT OF HYDRAULIC SERVO CYLINDERS FOR MOULD OSCILLATION. International Journal of Fluid Power, 13(1), 51–60. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/697

Issue

2012: Vol 13 Iss 1

Section

Original Article