Testing Of The Stack-type Piezoelectric Ceramic Characteristics And Modeling

With the rapid development of high-tech fields and relevant market, the accuracyrequirements for the drive, sensor and control of system have become increasinglydemanding. Piezoelectric actuators are widely used in various fields for the precisionpositioning， with characteristics of high positioning accuracy and rigid hardness, fastresponse, etc. Because of its micro-nano level motion accuracy feature, it hasincreasingly wide application value in the field of ultra-precision processing andmicro-nano manufacturing, playing a crucial role in the development of this field aswell. However, nonlinear character of piezoelectric actuators, like hysteresis not onlydirectly influences the performance of the whole platform, but also increases thedifficulty of precisely controlling the platform. This paper mainly studies theinput—output characteristics of piezoelectric actuator, by establishing hysteresis modeland coupled modeling the piezoelectric actuator and the flexible hinge amplificationmechanism, thus providing a theoretical basis for control compensation of the PZTAmicro-displacement system.In order to analyze the characteristics of piezoelectric actuators and modelvalidation，piezoelectric micro-displacement system experimental platform has beendesigned, built and tested, experiments on the impact of input voltage amplitude,frequency, waveform changes, as well as force load upon displacement output havebeen conducted.The classical Preisach Model and its whole process of analysis are described in thispaper. Numerical methods are used for experimental predictions of piezoelectricactuators. Experiments have been done to verify the eliminative and consistentproperties of the model. The displacement output of piezoelectric actuator under thedriving voltage is predicted, including its error analysis. Hysteresis model under load isproposed and validated by experiments.Finally, this paper analyzes the characteristics and functions of the various parts ofPZTA micro-displacement system，as well as the coupling movement process ofdrive and flexible hinge. By building electromechanical coupled model of drive andelastic motion model of flexible hinge, a coupled modeling of piezoelectric actuator andbridge flexible hinge is proposed and proved effective by experiments.