A bidirectional power supply for piezoelectric actuator was proposed and studied,which can apply high bidirectional voltage to the piezoelectric actuator continuously from negtive to positive.
The effect of the bonding layer between beam and piezoelectric actuator is considered in the analysis. This paper shows that the shear stress distribution in bonding layer has similar characteristics to the strain distributions near the ends of the actuator. There is a sharp rise in the shear stress at the ends of the piezoelectric with the shear modulus increasing or the thickness decreasing.
2. For relaxation of the stress concentration in the region around the electrode edge of the multilayer piezoelectric actuator, a geometry optimized model is brought forward, by changing the interfacial crack into an angle.
In this paper,the tension bending coupling model is presented by virtual work principle,the effect of the bonding layer between beam and piezoelectric actuator is considered in the analysis.
The placement rule of piezosensors and piezoactuators for cantilevered plate is given,and the piezoelectric control equation based on distributed piezoelectric actuators for cantilevered plate including bending and torsion modes is derived,and the control methods can be designed using this equation.
While the ER clamps are combined with piezo actuators in different way,the movement of the motor in x diection or y direction on the base plate can be obtained according to a bionic motion mode.
The split morph can be used as precision positioner, especially as the secondary actuator in dual stage head positioning servo system of high density hard disk drives.
To investigate the flow and heat transfer characteristics of a synthetic jet driven by piezoelectric actuator, experimental investigation utilizing particle image velocimetry, hot-wire anemometer and infrared camera was carried out.
The paper describes in details the development process including the numerical simulation of the pump effect, the investigation of the piezoelectric actuator, the fabrication and the characterization.
And then multilayer piezoelectric actuator based on new piezoelectric ceramic material was used as the electricity-machine converter of the proposed piezoelectric electro-hydraulic servo valve.
Calculations using a simple resonant mechanical circuit model show that piezoelectric actuators generate sufficient power, force and stroke to drive the wings at 150 Hz.
The dependence of the stress generated by the piezoelectric element on time, measuring circuit parameters, and external perturbing action is obtained analytically.
The operation of a microwave piezoelectric transducer whose piezoelectric element is connected through a number of intermediate layers with two acoustic loads is investigated.
The impedance of a piezoelectric element with an arbitrary number of transformable layers and the acoustic power radiated from each of the piezoelements of the transducer are calculated.
By using piezoelectric effect and anti-piezoelectric effect,the piezoelectric sensors and actua-tors can be obtained. Now,the applications of these devices to active vibration and noise Controls have become a new research field in vibration and noise control engineering. This paper summarizes recent development about this field. Some problems which should be taken into account in future research are also presented.
Based on the piezoelectric constitutive equations and by treating the applied electric signal as an external exciting action,this article gives theoretically and exactly the dynamic effect of a most commonly used piezoelectric actuator excited by electric signal,and expresses the actuation forces of the actuator simultaneously,which form the exact theoretical basis for the previously reported results Based on the results in this article it is n...
In this paper, the static tension-bending coupling model is presented by force equilibrium formation. The effect of the bending layer between beam and piezoelectric actuator is considered in the analysis. This paper shows that the shear stress distribution in bending layer has similar characteristics as the strain distribution near the ends of the actuator. The shear stress rises sharply at the ends of the piezoelectric actuator with the shear modulus increasing or the thickness decreasing.
压电致动器
piezoelectric actuator
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