Recent attention has been given to acoustic non-reciprocity in metamaterial with nonlinearity. However, the study of asymmetric cells has been limited to mechanical diode only. There is no work reported on electromechanical rectifiers or diodes. This problem is investigated here by analytically and numerically  studying  a combination of nonlinear and linear chains coupled with electromechanical resonators. The system is simulated numerically using MATLAB built in integrator and the results are validated by results found in the literature. Numerical examples are  carried out to obtain band structure, operation range of electromechanical diode, harvested power, and significant frequency shift. The latter are demonstrated using spectro-spatial analyses. The observed frequency shift is used to construct an electromechanical diode to guide the wave to propagate in one direction only. This only allows signal sensing for waves propagating in one direction and reject any other signals. Furthermore, this electromechanical diode is evaluated by calculating the transmission ratio and the asymmetric ratio for transient input signal.


Electromechanical Diode: Acoustic Non-Reciprocity in Weakly Nonlinear Metamaterial With Electromechanical Resonators

Division / Sponsors: 
Design Engineering Division and Computers & Information In Engineering Division


Paper Proceedings: https://asmedigitalcollection.asme.org/IDETC-CIE/IDETC-CIE2020/volume/83907

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