A novel stepping linear precise actuator is proposed based on piezoelectric stack as actuator element

the overall structure of linear actuator is designed

its working principle is analyzed.The prototype of linear actuator is fabricated

and its test is carried out.The experimental results show that there is a good linear relationship between voltage and step distance

but the actuator has step distance error.Using PCI—6229NI data acquisition card

closed-loop feedback control system of actuator is designed with LabVIEW software.The comparative experimental results show that the positioning precision of the actuator improves significantly

which reaches 0.06 μm.