نتایج جستجو برای: bimorph piezoelectric actuator

تعداد نتایج: 26084  

2015
Dong Wang Peng Yu Feifei Wang Ho-Yin Chan Lei Zhou Zaili Dong Lianqing Liu Wenjung Li

A modified Prandtl-Ishlinskii (PI) model, referred to as a direct inverse asymmetric PI (DIAPI) model in this paper, was implemented to reduce the displacement error between a predicted model and the actual trajectory of a piezoelectric actuator which is commonly found in AFM systems. Due to the nonlinearity of the piezoelectric actuator, the standard symmetric PI model cannot precisely describ...

2012
Dulip Samaratunga Ratneshwar Jha

Abaqus/Standard simulation of Lamb waves in smart composite plates is investigated for detecting delamination type damage. Composite plates typical of aerospace structures are used and a PZT actuator is surface bonded to excite Lamb waves. Abaqus model of composite plate uses layered solid elements. Piezoelectric (PZT-5H) actuator is modeled using piezoelectric elements that have both displacem...

2010
Dibin Zhu Ahmed Almusallam Stephen P. Beeby John Tudor

This paper reports a bimorph piezoelectric vibration energy harvester incorporating multiple PZT layers. The advantage of a multi-layer generator is that it produces a higher power than a single-layer generator having the same total thickness. In addition, a lower voltage is required to polarize a multi-layer generator reducing the risk of breakdown during polarization. Moreover, the optimum re...

2009
Holger Nicklich Martin Brucke Michael Mende

Shock exciters available on the market today suffer from a lack of control of the generated shocks. This paper will present a new type of shock exciter developed by SPEKTRA which is based on the well known HopkinsonBar but using a piezoelectric actuator to apply the force pulse input (* patent pending, [1]). It will be shown that a piezoelectric actuator driven Hopkinson-Bar generates well defi...

2000
Sung Chul Bae Steve Granick

A simple interferometric method is described to measure the time-dependent deformation of piezoelectric bimorphs driven by ac voltage. Applying this method to a bimorph assembly used to measure viscoelastic forces in a surface forces apparatus, we find that a sinusoidal-shaped harmonic drive voltage generates sinusoidal deformation but that a triangular-shaped harmonic drive voltage fails to pr...

1997
F. De Ambroggi Luigi Fortuna Giovanni Muscato

1 . I N T R O D U C T I O N Microrobotics researches require to operate on autonomous devices with simple design and limited costs and energy consumption, even if this fact limits the possible tasks of each single robot. In the last few years the interest in micro mechatronic systems is increasing and several different kind of microrobots have been designed [1], [2],[3]. Applications of these r...

Journal: :Journal of physics 2022

Abstract With brighter synchrotron sources, automated sample changers, and faster detectors, there is a strong scientific need for rapid precise variation of the X-ray beam profile, rather than “set forget” operation years past. Piezoelectric bimorph deformable mirrors already allow quick profile changes without heat generation wear mechanical devices. Now, their early technological limitations...

2015

This paper presents the design and fabrication of a novel piezoelectric actuator for a gas micro pump with check valve having the advantages of miniature size, light weight and low power consumption. The micro pump is designed to have eight major components, namely a stainless steel upper cover layer, a piezoelectric actuator, a stainless steel diaphragm, a PDMS chamber layer, two stainless ste...

Journal: :Journal of the Korean Society for Nondestructive Testing 2012

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