According to the necessity of non-circular piston pinhole and actuality of its manufacturing,a piezoelectric actuator driven micro-displacement mechanism is put forward to achieve the feeding of boring tool.

In order to meet the requirements that tools feeding should be long-travel, high-frequency and high-precision in non-circular precision turning, a new one-freedom flexure hinge structure is put forward to amplify the output displacement of piezoelectric actuator.

According to the zero offset,the piezoelectric actuator and the servo motor drive the vertical scanning platform to move vertically to ensure that the lever return to balance position at every sample interval.

Study on PZT actuator creep characteristics;

High resolution piezoelectric ceramic (PZT) digital driving power supply based on FPGA and PA85 was designed for the application of the PZT actuator in six degrees of freedom of (6-DOF) micro-displacement platform.

In this paper, a parameters self-tuning fuzzy PID control technique is developed to overcome the effect of the hysteresis and nonlinearity on piezoelectric actuators.

A control model of piezoelectric actuators is introduced.

In this paper, by utilizing piezoelectric ceramic actuator,s characteristic of piezoelectric and frictional damper s characteristic of that the magnitude of friction force is detedrined by the magnitude of its clipping force, smart piezoelectric-friction damper is presented.

As to the characteristic of piezoelectric ceramic actuators,a power amplifier for piezoelectric actuator was proposed,which can apply high voltage(±200 V peak to peak) to the actuator and it is characterized by making the output of piezoelectric actuator to scan at the operational frequency of 50～200 Hz.