Modelling and experimental validation of a nonlinear proportional solenoid pressure control valve

Authors

  • Alessandro Dell’Amico Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Linköping, Sweden
  • Petter Krus Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Linköping, Sweden http://orcid.org/0000-0002-2315-0680

DOI:

https://doi.org/10.1080/14399776.2016.1141636

Keywords:

Nonlinear modelling, solenoid, pressure control valve, linear analysis

Abstract

This paper investigates the static and dynamic behaviour of a pressure control valve with nonlinear negative characteristics. The pressure control valve has both reducing and relieving capability and is actuated by a solenoid. The static characteristics have been measured over the entire working range, covering the dynamic response of the solenoid, as well as the complete valve. A model is proposed that considers the flow as a mix of laminar and turbulent flow and flow forceswith a flow angle that varies with the stroke of the spool. The model shows good agreement with measurements. The investigations show that the flow forces decrease with higher flow rates as a result of a flow angle that tends to go towards a vertical angle. This results in an increase in pressure with flow during pressure reducing mode. A linear analysis is also presented, explaining this as a negative spring constant in the low frequency range. Stability is, however, maintained.

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Author Biographies

Alessandro Dell’Amico, Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Linköping, Sweden

Alessandro Dell’Amico received his Master of Science in Mechanical Engineering from Linköping University and is currently working towards a PhD degree at the division of Fluid and Mechatronic Systems, Linköping University. Research interest in modelling, simulation and control of fluid power systems, mechatronic systems and digital hydraulics. Applications are in automotive systems and construction machinery.

Petter Krus, Division of Fluid and Mechatronic Systems, Department of Management and Engineering, Linköping University, Linköping, Sweden

Petter Krus Professor in Fluid and Mechatronic Systems at Linköping University. Research interest in fluid power, mechanical, and mechatronic systems technology, specifically focusing on system dynamics, control, system simulation, optimization, system design and design automation. Applications are in aircraft design, road vehicles and construction machines.

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Published

2016-08-01

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Original Article