MODELLING AN ELECTRO-HYDRAULIC POPPET VALVE

Authors

  • Patrick Opdenbosch Machine Technologies Research, Technology and Solutions Division, Caterpillar Inc., Peoria, IL 61656, USA
  • Nader Sadegh The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 813 Ferst Dr., Atlanta, GA 30332, USA
  • Wayne Book The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 813 Ferst Dr., Atlanta, GA 30332, USA
  • Todd Murray HUSCO International, 2239 Pewaukee Rd, Waukesha, WI 53188, USA
  • Roger Yang HUSCO International, 2239 Pewaukee Rd, Waukesha, WI 53188, USA

Keywords:

nonlinear model, proportional control valve, poppet valves, bidirectional valve, flow conductance factor

Abstract

This paper develops the dynamic modelling of a novel two-stage bidirectional poppet valve and proposes a simplified model that is more suitable for control purposes. The dynamic nonlinear mathematical model of this Electro- Hydraulic Poppet Valve (EHPV) is based on the analysis of the interactions among its three internal systems: the mechanical, hydraulic, and electromagnetic system. A discussion on the employed experimental methodology is included along with the validation of this model. When the pressure differential across the valve is sufficiently high and does not vary considerably, the model for this valve can be simplified substantially. More specifically, the EHPV can be modelled as a linear second order system with a static input nonlinearity. This nonlinearity is realized from the valve’s steady state characteristics. The advantage of this separation between valve dynamics and nonlinearities is that an inverse linearisation approach (to cancel the nonlinearity) can be used to facilitate the control task for the valve.

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Author Biographies

Patrick Opdenbosch, Machine Technologies Research, Technology and Solutions Division, Caterpillar Inc., Peoria, IL 61656, USA

Patrick Opdenbosch, Ph.D. Dr. Opdenbosch received the Bachelor of Science in Mechanical Engineering from the Georgia Institute of Technology in 2002. He also received the M.S. and Ph.D. degrees in 2005 and 2007 respectively from the same university. Currently, he is a controls engineer at Caterpillar Inc. His research interests include intelligent control applied to fluid power, fault diagnostics, robotics, mechatronics, and machine vision.

Nader Sadegh, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 813 Ferst Dr., Atlanta, GA 30332, USA

Nader Sadegh, Ph.D. Professor Sadegh received the Bachelor of Science in Mechanical Engineering from the University of California, Santa Barbara in 1982. He received the M.S. and Ph.D. degrees in 1984 and 1987 respectively from the University of California, Berkeley. He is currently an Associate Professor at the Georgia Institute of Technology. His research interests include nonlinear identification and control, neural networks, robotics, and adaptive control.

Wayne Book, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 813 Ferst Dr., Atlanta, GA 30332, USA

Wayne Book, Ph.D. Professor Book received the Bachelor of Science in Mechanical Engineering from the University of Texas, Austin in 1969. He received the M.S. and Ph.D. degrees in 1971 and 1974 respectively from the Massachusetts Institute of Technology. He is currently the HUSCO/Ramirez Chair in Fluid Power at Georgia Tech. His research interests include the design, dynamics, and control of light weight motion systems, robotics, fluid power, and haptics. He is a fellow of the ASME, SME, and IEEE, and received the Georgia Tech’s award for Outstanding Faculty Leadership for development of graduate research assistants in 1987, and an ASME dedicated Service award in 2003 and the ASME DSCD Leadership award in 2004.

Todd Murray, HUSCO International, 2239 Pewaukee Rd, Waukesha, WI 53188, USA

Todd Murray Mr. Murray received the Bachelor of Science in Mechanical Engineering from the University of Wisconsin at Milwaukee in 2003. He has been employed at HUSCO International since, and worked as a Controls and Simulation Engineer, specializing in EHPV modeling, from 2004 to 2007. His professional interests also include on-highway suspension systems, and he is currently developing adaptive damping automotive suspension hardware.

Roger Yang, HUSCO International, 2239 Pewaukee Rd, Waukesha, WI 53188, USA

Roger Yang, Ph.D. Dr. Yang received the Bachelor of Science in Mechanical Engineering from Shanghai University of Technology, China in 1982. He received the Ph.D. degree of Mechanics in 1991 from University of Minnesota, Minneapolis. He is currently a Senior Staff Engineer at HUSCO International, Inc. His research interests include R&D in hydraulic valve systems and advanced computer simulations in mobile hydraulics.

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Published

2009-11-01

How to Cite

Opdenbosch, P., Sadegh, N., Book, W., Murray, T., & Yang, R. (2009). MODELLING AN ELECTRO-HYDRAULIC POPPET VALVE. International Journal of Fluid Power, 10(1), 7–15. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/502

Issue

2009: Vol 10 Iss 1

Section

Original Article