Influence of control valve delay and dead zone on the stability of a simple hydraulic positioning system

Bálint Magyar, Csaba Hós, Gábor Stépán

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

This paper deals with the PI control of a highly simplified dynamic model of a hydraulic cylinder. It is assumed that the hydraulic fluid is incompressible and that the pump provides constant flow rates, which results in the possibility of velocity control. Two types of anomalies are taken into account: (a) the time delay due to the controller computations and the internal pressure dynamics and (b) the dead zone of the controller valve. This results in a nonlinear system are described by a piecewise linear discontinuous map. Nonlinear behavior of the system is explored and the practically globally stable parameter domains are identified.

Original languageEnglish
Article number349489
JournalMathematical Problems in Engineering
Volume2010
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Mathematics(all)
  • Engineering(all)

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