This paper presents a finite element formulation for the dynamics analysis of the steady and transient states of a nonlinear piezoelectric beam. A piezoelectric beam with damping is studied under harmonic excitation. A numerical method is used for this analysis. In the paper, the central difference formula of four order is used and compared with the central difference formula of two order in th...

Through the suitable geometry of a repeating unit, metamaterial can exhibit property not present in base material. Here, we propose class low area-fraction, bending-dominated metamaterials that apparent piezoelectricity, even though material is piezoelectric. The proposed exploit universal electromechanical coupling operative at sub-micron scales, flexoelectricity, and upscale it to macro-scale...

energy harvesting from surrounding environment has been attractive for many researchers in recent years. therefore, developing appropriate test apparatus to study energy harvesting mechanisms and their performance is of paramount importance. due to their electromechanical characteristics, piezoelectric materials are used for harvesting energy from environmental vibrations. for optimum utilizati...

In this paper, we present mathematical analyses to consider the effect of material properties on the sensitivity of the Microelectromechanical systems (MEMS) piezoelectric hydrophone and improve the sensitivity by choosing the proper material. The selected structure in the present paper is a piezoelectric hydrophone able to work at low frequencies. The piezoelectric hydrophones are widely used ...

The development of cantilever-based piezoelectric vibrational energy harvesters (VEHs) is reaching a critical transition into commercial applications but being held back because the lack understanding regarding fatigue these systems. Identifying possible phenomena for VEH gives good basis knowledge creation numerical models. an electromechanical model carried out to capture property variations ...

This paper presents a new passivity property for distributed piezoelectric devices with integrable port-variables. novel passivity-based control approach is suited dissipative systems. We present two methodologies by exploiting the integrability of The derived controllers have Proportional-Integral (PI) like structure and are shown to asymptotically stabilize devices. Finally, simulation result...

We report the first piezoelectric potential gated hybrid field-effect transistors based on nanotubes and nanowires. The device consists of single-walled carbon nanotubes (SWNTs) on the bottom and crossed ZnO piezoelectric fine wire (PFW) on the top with an insulating layer between. Here, SWNTs serve as a carrier transport channel, and a single-crystal ZnO PFW acts as the power-free, contact-fre...

We demonstrate a water-immersible thin film lead zirconate titanate, Pb(Zr,Ti)O3, [PZT] actuator, without special passivation layer, towards in-vivo or in-vitro scanning probe microscope (SPM) measurements of living cells in water or biological fluids. In order to be water-immersible, the electrodes need to be electrically insulated and the piezoelectric layer needs to be protected against dire...

An effective wide band active control law through one kind of the Dynamic Vibration Absorber (DVA) is proposed and studied in this paper. With the help of mechanical impedance method, active DVA control law is formulated based on the passive mechanical model. The electrical DVA can generate multi-mode active damping to the structure. The host structure is an aluminum plate and acceleration sign...