"Modeling Nonlinear Behavior in a Piezoelectric Actuator" by Hanz Richter, Eduardo A. Misawa et al.
 

Document Type

Article

Publication Date

4-2001

Publication Title

Precision Engineering

Abstract

A piezoelectric tube actuator is employed as a sample positioning device in Nanocut, a cutting instrument conceived to study the mechanics of nanometric cutting. Extension of functionality of the instrument as a nanometric machine tool motivates the search for an accurate model of the actuator for implementing feedback control. A simple nonlinear model describing longitudinal expansion of the piezoelectric tube actuator is presented in this paper. The model derivation is based on a non-formal analogy with nonlinear viscoelastic materials under uniaxial extension, for which the responses to a step input are similar to the piezoelectric tube. Suitability of the model structure for arbitrary inputs is tested by cross-verification between time and frequency domains. Two parameter estimation procedures are examined and the results of the experimental work for characterization, estimation and validation are presented.

DOI

10.1016/S0141-6359(00)00067-2

Version

Postprint

Volume

25

Issue

2

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