Simulation of a high frequency on/off valve actuated by a piezo-ring stack for digital hydraulicsPaolo Tamburrano, Pietro De Palma, Andrew R. Plummer, Elia Distaso, Francesco Sciatti and Riccardo AmiranteE3S Web Conf., 312 (2021) 05008DOI: https://doi.org/10.1051/e3sconf/202131205008