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Volume 10
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10.3390/act10070156
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Article

Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis †

by
Paolo Tamburrano
1,*,
Elia Distaso
1,
Andrew R. Plummer
2,
Francesco Sciatti
1,
Pietro De Palma
1 and
Riccardo Amirante
1
1
Department of Mechanics, Mathematics and Management (DMMM), Polytechnic University of Bari, 70121 Bari, Italy
2
Centre for Power Transmission and Motion Control (PTMC), University of Bath, Bath BA2 7AY, UK
*
Author to whom correspondence should be addressed.
†
This paper is an extended version of “Tamburrano, P., De Palma, P., Plummer, A. R., Distaso, E., & Amirante, R. (2020). Feasibility study of using amplified piezo-stack actuators for the actuation of direct drive servovalves. In Proceedings of the 75th National ATI Congress—#7 Clean Energy for All (ATI 2020), Rome, Italy, 15–16 September 2020”.
Actuators 2021, 10(7), 156; https://doi.org/10.3390/act10070156
Submission received: 17 May 2021 / Revised: 2 July 2021 / Accepted: 5 July 2021 / Published: 7 July 2021
(This article belongs to the Special Issue Recent Advances on Servovalves)
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Abstract

This paper presents a feasibility study using commercially available amplified piezo-stacks for the direct actuation of four-way three-position (4/3) direct drive servovalves. The prospect of using amplified piezo-stacks in place of linear force motors is very attractive by virtue of their fast response speed and low weight. Piezo-stacks equipped with mechanical amplification systems can give levels of displacement suitable for this application. A very effective amplification system has recently been produced by some manufacturers and is based on a temperature-independent diamond structure. This paper details simulations of a 4/3 servovalve directly actuated by such a piezoelectric actuator with a diamond structure. To this end, well-established equations, implemented in Simulink by means of the libraries of Simscape Fluids, are used. The proposed architecture shows simplicity of construction; in addition, very good step response speed and frequency response are predicted by the simulations.
Keywords: servovalve; direct drive; amplified piezo-stack servovalve; direct drive; amplified piezo-stack

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MDPI and ACS Style

Tamburrano, P.; Distaso, E.; Plummer, A.R.; Sciatti, F.; De Palma, P.; Amirante, R. Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis. Actuators 2021, 10, 156. https://doi.org/10.3390/act10070156

AMA Style

Tamburrano P, Distaso E, Plummer AR, Sciatti F, De Palma P, Amirante R. Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis. Actuators. 2021; 10(7):156. https://doi.org/10.3390/act10070156

Chicago/Turabian Style

Tamburrano, Paolo, Elia Distaso, Andrew R. Plummer, Francesco Sciatti, Pietro De Palma, and Riccardo Amirante. 2021. "Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis" Actuators 10, no. 7: 156. https://doi.org/10.3390/act10070156

APA Style

Tamburrano, P., Distaso, E., Plummer, A. R., Sciatti, F., De Palma, P., & Amirante, R. (2021). Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis. Actuators, 10(7), 156. https://doi.org/10.3390/act10070156

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