A review of novel architectures of servovalves driven by piezoelectric actuators

Paolo Tamburrano, Francesco Sciatti, Andrew R. Plummer, Elia Distaso, Pietro De Palma, Riccardo Amirante

Research output: Contribution to journalArticlepeer-review

7 Citations (SciVal)


This paper is a thorough review of innovative architectures of electro-hydraulic servovalves that exploit actuation systems based on piezo-electric materials. The use of commercially available piezo-electric actuators, namely, piezo stacks, amplified piezo stacks, rectangular benders, and ring benders, is very promising for the actuation of the main stages and of the pilot stages of servovalves given the fast response and low weight of piezoelectric materials. The use of these actuators can also allow novel designs to be developed, thus helping manufacturers to overcome the typical drawbacks of commercial servovalves, such as the high complexity and the high internal leakage of the pilot stages of two-stage servovalves as well as the large size and weight of direct-drive servovalves. First, the piezoelectric actuators that can be used for driving servovalves are presented in the paper, and their characteristics are thoroughly discussed. The main novel architectures present in the literature are then explained and compared with the commercial ones, and their performance parameters are discussed to draw conclusions on the prospect that some of these architectures can be used by manufacturers as future designs.

Original languageEnglish
Article number4858
Issue number16
Publication statusPublished - 9 Aug 2021


  • Amplified piezo stacks
  • Piezo stacks
  • Piezoelectric actuators
  • Rectangular benders
  • Ring benders
  • Servovalves

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering


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