Mechanically amplified large displacement piezoelectric actuators

Juuti, Jari; Kordás, Krisztián; Lonnakko, R.; Moilanen, V.-P.; Leppävuori, S.

doi:10.1016/j.sna.2004.11.016

Cited by 73 publications

(37 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A major drawback of conventional piezostack, which limits its applications, is its relatively small deformation range. Generally, the deformation range of piezostack is about 0.1% of its own length [5,6]. In most of its applications, larger working ranges are required.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the displacement amplification ratio of bridge-type mechanism

Xiang

Fang

et al. 2015

Mechanism and Machine Theory

143

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Analysis of the displacement amplification ratio of bridge-type mechanism

Xiang

Fang

et al. 2015

Mechanism and Machine Theory

143

View full text Add to dashboard Cite

“…Table 1. The effect of the cymbal geometry Geometry of cymbal transducer defined in (Dogan, 2004 Inspired by the success of the invention of the cymbal transducer based on a novel application of the piezoceramics, researchers proposed subsequent modifications and applications (Zhang et al, 2001;Zhang et al, 1999) increasing even further the displacement of the end-caps (Dong et al, 2002;Sun et al, 2006;Juuti et al, 2005), reducing stresses in the end-caps, and exhibiting a less hysteretic behaviour (Narayaman and Shwartz, 2010). One of the advanced versions of the cymbal transducer is the wagon wheel ( Figure. 2), which was developed from the cymbal.…”

Section: Introductionmentioning

confidence: 99%

Hybrid energy harvesting based on cymbal and wagon wheel inspiration

Ganilova¹,

Awaludin

Dong

2017

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Abstract:The demand for self-sufficient electronic devices is increasing as well as the overall energy use, and such demands are pushing technology forward, especially in effective energy harvesting. A novel hybrid Energy Harvesting System (EHS) has been proposed and analysed in this paper. It has been demonstrated that the EHS is capable of converting enough energy to power a typical MEMS device. This has been achieved through unification of the nine Cymbal Energy Harvester (CEH) array, as an energy harvesting core, and Shape Memory Alloy (SMA) active elements, acting as a source of force stimulated by the environmental changes. A Finite Element Model (FEM) was developed for the CEH, which was verified and used for the analysis of CEHÕs response to the change of the end-cap material. This was followed by the FEM for the EHS used for analysis of the location of SMA wires and force generated by each wire individually and then all together. As a further optimisation of the EHS a novel Wagon Wheel design was explored in terms of its energy harvesting capabilities. As expected, due to the increased displacement, an increase in the power output was achieved.

show abstract

“…A piezoelectric actuator usually consists of two main components [35]: a mechanical part, which is a flexible structure, and an electrical part, which is the piezoelectric material block. One of the important issues of using piezoelectric actuator is to improve their performance for a certain amount of piezoelectric material, which is the goal of piezoelectric actuator design.…”

Section: Introductionmentioning

confidence: 99%

A FEM-BEM interactive coupling for modeling the piezoelectric health monitoring systems

Shah

2011

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

In this research, finite element and boundary element methods are coupled together to model the interaction of a piezoelectric ceramic working as an actuator with an elastic material. Piezoelectric-elastic material's interaction occurs in smart structures. This work is aimed at determining the actuation effects being transferred from the actuators to the host and the resulting overall structural response. To obtain the amount of these actuations, the system of the host structure and an actuator has been modeled by using coupled finite element boundary element method in frequency domain. The host structure, which is assumed as an isotropic elastic solid region is modeled as a half space. The piezoelectric ceramic region is modeled by the 3-D finite element method, while the elastic half space with boundary element method. Finite element model of piezoelectric ceramic and boundary element model of the elastic half space are coupled together at their interface such that the vibrations of the piezo-actuator induce vibrations in the elastic half space. A couple of examples are given to show the induced displacement field around the piezo-actuator on the surface of the elastic medium. The results show that high jump in magnitude of horizontal displacements at the corners of the actuator attached to the structure occurs, which is an indication of high stress concentration, of the shear stress type at the corners. This stress concentration sometimes causes complete debonding of the actuator from the base structure. By using the suggested BEM-FEM coupled model for actuators with different dimensions or material properties much useful information concerning the amount of actuation and load transfer can be obtained. The presented work is a step towards modeling of structural health monitoring systems.

show abstract

Mechanically amplified large displacement piezoelectric actuators

Cited by 73 publications

References 16 publications

Analysis of the displacement amplification ratio of bridge-type mechanism

Analysis of the displacement amplification ratio of bridge-type mechanism

Hybrid energy harvesting based on cymbal and wagon wheel inspiration

A FEM-BEM interactive coupling for modeling the piezoelectric health monitoring systems

Contact Info

Product

Resources

About