Title :
Characterization of nonlinearities in a piezoelectric positioning device
Author :
Richter, Hanz ; Misawa, Eduardo A. ; Lucca, Don A.
Author_Institution :
Sch. of Mech. & Aerosp. Eng., Oklahoma State Univ., Stillwater, OK, USA
Abstract :
Static nonlinearity, drift and hysteresis are effects that limit the open-loop operation of piezoelectric (PZT) tubes as positioning devices. In this paper, several experiments are presented that characterize and quantify these effects. Experiments are carried out on the Nanocut, a nanometric cutting instrument, which utilizes a PZT tube as a three-dimensional actuator. PI control is used in the z axis in order to increase accuracy and linearity, with acceptable results for low-bandwidth operation. The system is tested in a nano-indentation experiment, resulting in adequate tracking accuracy.
Keywords :
control nonlinearities; lead compounds; nanotechnology; piezoceramics; piezoelectric actuators; position control; 3D actuator; Nanocut; PI control; PZT tubes; drift; hysteresis; low-bandwidth operation; nanometric cutting instrument; nonlinearity characterization; open-loop operation; piezoelectric positioning device; static nonlinearity; Actuators; Aerospace engineering; Electrodes; Fasteners; Hysteresis; Instruments; Linearity; Piezoelectric devices; Piezoelectric transducers; Voltage;
Conference_Titel :
Control Applications, 1997., Proceedings of the 1997 IEEE International Conference on
Conference_Location :
Hartford, CT, USA
Print_ISBN :
0-7803-3876-6
DOI :
10.1109/CCA.1997.627743
