Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics

Despite being widely used in several applications, commercially available spool valves, both servovalves and proportional valves, are inefficient components because they cause high power consumption due to the large pressure drops across the metering orifices. A recent research field aims at substit...

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Autores principales:	Tamburrano Paolo, De Palma Pietro, Plummer Andrew R., Distaso Elia, Sciatti Francesco, Amirante Riccardo
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	ring stack digital hydraulics on/off valves pwm Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/7497f2bcc2c84a0395092e86f0d30aee
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spelling	oai:doaj.org-article:7497f2bcc2c84a0395092e86f0d30aee2021-11-08T15:18:51ZSimulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics2267-124210.1051/e3sconf/202131205008https://doaj.org/article/7497f2bcc2c84a0395092e86f0d30aee2021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/88/e3sconf_ati2021_05008.pdfhttps://doaj.org/toc/2267-1242Despite being widely used in several applications, commercially available spool valves, both servovalves and proportional valves, are inefficient components because they cause high power consumption due to the large pressure drops across the metering orifices. A recent research field aims at substituting spool valves with on/off valves having high switching frequency (changing state between open and closed in a few milliseconds or less) and producing low pressure drops, in order to make the so-called digital hydraulics possible. In spite of the advantages that it could provide, digital hydraulics does not have significative industrial applications yet, because of the difficulty in manufacturing such high frequency on/off valves. Hence, this paper performs a feasibility study of an on/off poppet-type valve actuated directly by a commercially available ring stack, which is a multilayer piezo-actuator capable of generating very high actuation forces needed for this application. Modulation of the average flow can be achieved by changing the duty cycle of the pulse width modulation (PWM) signal driving the piezostack. An inertance tube could also be used to smooth flow pulsation. The simulations obtained using a detailed Simulink model show that high switching frequency and very effective flow modulation can be obtained with this valve architecture along with low pressure drops and high flow rates, thus making it potentially suitable for digital hydraulics. The disadvantages of this single stage architecture are the large dimensions of the piezo stacks, and the high current generated because of both the high capacitance of the piezo stack and the high frequency switching. However, large-scale production of these components could help to reduce the costs, and the simulations show that limiting the maximum current to 10 A still provides good regulation.Tamburrano PaoloDe Palma PietroPlummer Andrew R.Distaso EliaSciatti FrancescoAmirante RiccardoEDP Sciencesarticlering stackdigital hydraulicson/off valvespwmEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 312, p 05008 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	ring stack digital hydraulics on/off valves pwm Environmental sciences GE1-350
spellingShingle	ring stack digital hydraulics on/off valves pwm Environmental sciences GE1-350 Tamburrano Paolo De Palma Pietro Plummer Andrew R. Distaso Elia Sciatti Francesco Amirante Riccardo Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
description	Despite being widely used in several applications, commercially available spool valves, both servovalves and proportional valves, are inefficient components because they cause high power consumption due to the large pressure drops across the metering orifices. A recent research field aims at substituting spool valves with on/off valves having high switching frequency (changing state between open and closed in a few milliseconds or less) and producing low pressure drops, in order to make the so-called digital hydraulics possible. In spite of the advantages that it could provide, digital hydraulics does not have significative industrial applications yet, because of the difficulty in manufacturing such high frequency on/off valves. Hence, this paper performs a feasibility study of an on/off poppet-type valve actuated directly by a commercially available ring stack, which is a multilayer piezo-actuator capable of generating very high actuation forces needed for this application. Modulation of the average flow can be achieved by changing the duty cycle of the pulse width modulation (PWM) signal driving the piezostack. An inertance tube could also be used to smooth flow pulsation. The simulations obtained using a detailed Simulink model show that high switching frequency and very effective flow modulation can be obtained with this valve architecture along with low pressure drops and high flow rates, thus making it potentially suitable for digital hydraulics. The disadvantages of this single stage architecture are the large dimensions of the piezo stacks, and the high current generated because of both the high capacitance of the piezo stack and the high frequency switching. However, large-scale production of these components could help to reduce the costs, and the simulations show that limiting the maximum current to 10 A still provides good regulation.
format	article
author	Tamburrano Paolo De Palma Pietro Plummer Andrew R. Distaso Elia Sciatti Francesco Amirante Riccardo
author_facet	Tamburrano Paolo De Palma Pietro Plummer Andrew R. Distaso Elia Sciatti Francesco Amirante Riccardo
author_sort	Tamburrano Paolo
title	Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
title_short	Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
title_full	Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
title_fullStr	Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
title_full_unstemmed	Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
title_sort	simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/7497f2bcc2c84a0395092e86f0d30aee
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Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulics

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