A weakly-singular form of the piezoelectric boundary integral equation (BIE) formulation is introduced in this paper, which eliminates the calculation of any singular integrals in the piezoelectric BIE. The crucial question of whether or not the piezoelectric BIE will degenerate when applied to crack and thin shell-like problems is discussed. It can be shown analytically that the conventional B...

The evaluation of transmission zeros is great importance for the control engineering applications. structures equipped with piezoelectric patches are complex to model and usually require finite element approaches supplemented by reduction. This study rigorously investigates influence mesh size, reduction, boundary conditions (free clamped), sensor/actuator configuration (collocated non-collocat...

A while-drilling energy harvesting device is designed in this paper to recovery along with the longitudinal vibration of drill pipes, aiming serve as a continuous power supply for downhole instruments during drilling procedure. Radial size determined through engineering field experience and geological survey reports. piezoelectric coupling model based on selected material was established via CO...

Piezoelectric actuators (PEAs) have been widely used in micro- and nanopositioning applications due to their fine resolution, rapid responses, and large actuating forces. However, a major deficiency of PEAs is that their accuracy is seriously limited by hysteresis. This paper presents adaptive model predictive control technique for reducing hysteresis in PEAs based on autoregressive exogenous m...

Abstract Piezoelectric harvesters are environmentally sustainable alternative electrical production technologies aimed at supplying small autonomous devices. The particular application in roads has significant potential. However, there discrepancies about the effectiveness of these harvesters, and their costs limit market expansion abilities. In this context, a novel harvester approach is explo...

Over the past few decades, prospect of energy generation from an oscillating piezoelectric patch has gained attention. A typical setup this kind would be a mounted on flexible plate that is exhibiting self-sustained flapping motion. Piezoelectric patches are generally multilayered consisting piezoelectric, substrate and electrode layers placed top each other. In paper, we first propose quasi-mo...

The aim of our work is to design a touch screen for displaying vibrotactile haptic feedback to the user via piezo patches attached to its surface. One of the challenges in the design is the selection of appropriate boundary conditions and the piezo configurations (location and orientation) on the screen for achieving optimum performance within the limits of human haptic perception. To investiga...

Rocket fairings, load-carrying structures of solid rocket motor case, e.g., inter-stage joint, satellite-rocket joint, etc., usually take the shape of conical shell sections. This paper is to evaluate spatially distributed microscopic control characteristics of distributed actuator patches bonded on conical shell surfaces. The converse effect of piezoelectric materials has been recognized as on...

In this work, we address the simulation and testing of MEMS micromirrors with hardening softening behaviour excited patches piezoelectric materials. The forces exerted by are modelled means theory ferroelectrics developed Landau–Devonshire based on experimentally measured polarisation hysteresis loops. large rotations experienced mirrors also induce geometrical nonlinearities in formulation up ...