Experimental results show that this model can effectively eliminate the effects of nonlinearity and hysteresis which affect the displacement output accuracy of a piezoelectric actuator, and improve the dynamic response property.
The nonlinearity and hysteresis of piezoelectric actuator are the major factors affecting the positioning accuracy in controlling a micropositioning platform.
Experiments and Performance Analysis of Piezoelectric-ActuatorBased on the understanding and mastering of the basic piezoelectric theory and the performance of piezoelectric materials, various piezoelectric actuators are studied.
The importance of smart materials and structures in the astronautical development is discussed. Based on the constitutive equation of piezoelectric materials,the applications of RC circuit and LRC circuit of piezoelectric actuators are studied.
Based on the study of kinds of nonlinear models, Maxwell hysteresis model of piezoelectric actuators was established. How to get the modeling parameters was also discussed.
A closing-loop controlling system is composed of a measuring displacement sensor used to feedback the displacement signals to servo-amplifier and the piezoelectric driver, which improved the dynamic and static states capability of the servo-valves.
Through analysis of the strain distribution over the transverse section of the intelligent cantilever beam, the theoretical calculating formula for the effective bending moment caused by piezoelectric driver train is deduced and two methods of measurement of the effective bending moment are presented.
The material characteristics,principle of operation,configuration and experimental results are described of a piezoelectric driver used for an automatic-track floating magnetic head.
finally designs MCS-51 control circuit including D/A and A/D converter circuit and develops a dynamic driving line power for piezoelectric ceramic actuator by utilizing excellent performance high voltage amplifier. In conclusion, the piezoelectric actuator system with high accuracy and long displacement is completed by assembling these parts.
Based on the mechanical properties analysis of piezoelectric ceramic actuator and metal friction damper, the smart piezoelectric-friction damper is introduced. Pseudo-viscous or pseudo-frictional piezoelectric-friction damper is put forward which is either displacement dependent or velocity dependent by properly setting the relationship between the electrical intensity of piezoelectric ceramic actuator and the relative displacement or velocity of damper, and the relative semi-active control rules are also discussed.
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.
Controlled by a high-resolution piezoelectric driver designed for scanning probe microscopy, the distance between the micropipette point and the polymer surface was kept to a few tens of nm.
We have improved the conventional design by introducing a multilayer piezoelectric driver and a Si solid-state detector in place of the conventional elements.
The piezoelectric driver can work at high frequencies (0.1-2 kHz) and the new set up can be assembled in a very compact way (a cylinder of approximate 15 cm length and 2 cm diameter).
压电驱动器
piezoelectric actuator
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