Because the output of piezoelectric actuator has close relation to mechanical and electric boundary condition, this paper analyzes the relations between boundary condition and piezoelectric equation as well as hysteresis. The output force and displacement versus voltage of bimorph with inner thick electrode are derived, which provide the design basis for SSA under arbitrary boundary condition.
Based on the model, the feedback controller was designed to obtain the inverse model. The piezoelectric actuator is in series with its inverse model to implement real time hysteresis compensation.
And we also get the fundamental resonant frequency of piezoelectric slip simply supported beams with the variation in electric field The relations between predicted resonance amplitude of max deflections for the piezoelectric actuators and the electric field.
The conclusion is given that the modal control forces produced by point piezoelectric actuators on flexible beam and frame are direct proportion to the modal strains at the places pasted piezoelectric flakes,based on modal control theory and Euler Bernoulli point force model of point piezoelectric actuator.
The predicted resonance amplitude of the tip deflections of the piezoelectric actuators, which increase with the increase in the magnitude of the electric field, the decrease in the mechanical quality factor with the increase in the electric field, and well agrees with experimental results.
The conclusion is given that the modal control forces produced by point piezoelectric actuators on flexible beam and frame are direct proportion to the modal strains at the places pasted piezoelectric flakes,based on modal control theory and Euler Bernoulli point force model of point piezoelectric actuator.
In order to get the model, the characteristic data measurement algorithm was investigated from the SPM image of one-dimension or two-dimension raster to get the input-output of PZT.
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.