A novel solution for the elimination of mode switching in pump-controlled single-rod cylinders

Petter H. Gøytil*, Damiano Padovani, Michael R. Hansen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This paper concerns the stability issue of pump-controlled single-rod cylinders, known as mode switching. First, a review of the topic is provided. Thereafter, the most recently proposed solution for the elimination of mode switching is investigated and shown to result in unstable behavior under certain operating conditions. A theoretical analysis is provided demonstrating the underlying mechanisms of this behavior. Based on the analysis, a novel control strategy is proposed and investigated numerically. Proper operation and stability are demonstrated for a wide range of operating conditions, including situations under which the most recently proposed solution results in unstable behavior and loss of control over the actuator.

Original languageEnglish
Article number20
JournalActuators
Volume9
Issue number1
DOIs
StatePublished - 1 Mar 2020
Externally publishedYes

Keywords

  • Electrohydraulic valves
  • Large inertia loads
  • Linear actuators
  • Mode switching instability
  • Oscillations
  • Pump-controlled systems
  • Single-pump circuits
  • Stability

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