A novel piezoelectric double-flapper servovalve pilot stage: Operating principle and performance prediction

Paolo Tamburrano, Riccardo Amirante, Elia Distaso, Andrew R. Plummer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

This paper proposes a novel architecture for the pilot stage of electro-hydraulic two-stage servovalves that does not need a quiescent flow and a torque motor as well as a flexure tube to operate. The architecture consists of two small piezoelectric valves, coupled with two fixed orifices, which allow variation of the differential pressure at the main stage spool extremities in order to move it with high response speed and accuracy. Each piezoelectric valve is actuated by a piezoelectric ring bender, which exhibits much greater displacement than a stack actuator of the same mass, and greater force than a rectangular bender. The concept is intended to reduce the influence of piezoelectric hysteresis. In order to assess the validity of the proposed configuration and its controller in terms of spool positioning accuracy and dynamic response, detailed simulations are performed by using the software Simscape Fluids. At 50% amplitude the -90? bandwidth is about 150Hz.

Original languageEnglish
Title of host publicationBATH/ASME 2018 Symposium on Fluid Power and Motion Control, FPMC 2018
PublisherAmerican Society of Mechanical Engineers (ASME)
PagesV001T01A032
Number of pages10
ISBN (Electronic)9780791851968
DOIs
Publication statusPublished - 14 Sep 2018
EventBATH/ASME 2018 Symposium on Fluid Power and Motion Control, FPMC 2018 - Bath, UK United Kingdom
Duration: 12 Sep 201814 Sep 2018

Conference

ConferenceBATH/ASME 2018 Symposium on Fluid Power and Motion Control, FPMC 2018
CountryUK United Kingdom
CityBath
Period12/09/1814/09/18

Keywords

  • Piezoelectric
  • Ring bender
  • Servovalve
  • Simscape

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Control and Systems Engineering

Fingerprint Dive into the research topics of 'A novel piezoelectric double-flapper servovalve pilot stage: Operating principle and performance prediction'. Together they form a unique fingerprint.

Cite this