This paper presents a feasibility study using commercially available amplified piezostacks 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.
Direct drive servovalves actuated by amplified piezo-stacks: Assessment through a detailed numerical analysis / Tamburrano, P.; Distaso, E.; Plummer, A. R.; Sciatti, F.; De Palma, P.; Amirante, R.. - In: ACTUATORS. - ISSN 2076-0825. - ELETTRONICO. - 10:7(2021), pp. 1-16. [10.3390/act10070156]
Direct drive servovalves actuated by amplified piezo-stacks: Assessment through a detailed numerical analysis
Tamburrano P.
;Distaso E.;Sciatti F.;De Palma P.;Amirante R.
2021-01-01
Abstract
This paper presents a feasibility study using commercially available amplified piezostacks 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.