215 citations · 511 across the 8 of their papers we have counts for
9 papers
Flow-aware Optimal Navigation in Unsteady Flows through Reinforcement Learning
Andrea Maria Braghin, Nicolò Botteghi, Matteo Tomasetto +2
Autonomous robotic navigation in nonstationary time-varying fluid flows remains a fundamental challenge due to partial observability and the unpredictability of realistic environme…
Reduced-weight near-cloaks for underwater invisibility
Davide Enrico Quadrelli, Sebastiano Cominelli, Gabriele Cazzulani +1
Limiting the total weight of an acoustic cloak is of fundamental importance in underwater applications, where buoyancy of the cloaked object is desirable. Unfortunately, it is well…
High Bulk Modulus Pentamodes: the Three-Dimensional Metal Water
Giacomo Brambilla, Sebastiano Cominelli, Marco Verbicaro +2
Despite significant advances in the field of phononic crystals, the development of acoustic metafluids that replicate the behaviour of liquids in three dimensions remains elusive.…
Experimental validation of a broadband pentamode elliptical-shaped cloak for underwater acoustics
Davide Enrico Quadrelli, Matteo Alessandro Casieri, Gabriele Cazzulani +2
In this paper we report the numerical design and experimental validation of a pentamode cloak for scattering reduction of elliptical targets in underwater acoustics. Despite being…
Acoustic scattering reduction of elliptical targets via pentamode near-cloaking based on transformation acoustics in elliptic coordinates
Davide Enrico Quadrelli, Gabriele Cazzulani, Simone La Riviera +1
Cloaks for underwater applications designed for actual submarine acoustic stealth are still far from the technological advancement needed for being put in practice. Several challen…
Experimental observation of temporal pumping in electro-mechanical waveguides
Yiwei Xia, Emanuele Riva, Matheus I. N. Rosa +4
We experimentally demonstrate temporal pumping of elastic waves in an electromechanical waveguide. An aluminum beam covered by an array of piezoelectric patches connected to shunt…
Experimental observation of non-reciprocal band-gaps in a space-time modulated beam using a shunted piezoelectric array
Jacopo Marconi, Emanuele Riva, Matteo Di Ronco +3
In this work we experimentally achieve 1 kHz-wide directional band-gaps for elastic waves spanning a frequency range from approximately 8 to 11 kHz. One-way propagation is induced…
Non-reciprocal wave propagation in discretely modulated spatiotemporal plates
Emanuele Riva, Matteo Di Ronco, Gabriele Cazzulani +1
We investigate non-reciprocal wave propagation in spatiotemporal phononic plates. In particular, the first goal of this manuscript is to present a general formulation of the Plane…
Time-periodic stiffness modulation in elastic metamaterials for selective wave filtering: theory and experimental investigations
Giuseppe Trainiti, Yiwei Xia, Jacopo Marconi +2
We report on broadband-to-narrowband elastic wave filtering resulting from time-periodic modulation of the stiffness of a one-dimensional elastic waveguide. Time modulation produce…