Modeling nonlinear behavior in a piezoelectric actuator

Autor:	Don A. Lucca, Eduardo A. Misawa, Hanz Richter, Hongbing Lu
Rok vydání:	2001
Předmět:	Engineering business.product_category business.industry Estimation theory General Engineering System identification Mechanical engineering Viscoelasticity Machine tool Nonlinear system Step response Control theory Simple (abstract algebra) Actuator business
Zdroj:	Precision Engineering. 25:128-137
ISSN:	0141-6359
DOI:	10.1016/s0141-6359(00)00067-2
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b0b384c8ca787237ac31682c241544ef https://doi.org/10.1016/s0141-6359(00)00067-2 Zobrazit plný text záznamu Full Text from ScienceDirect