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Mechanical Engineering Faculty Publications
Piezoelectric tube; Nonlinear dynamic models; Nanometric cutting; Rheological models; Nonlinear viscoelasticity
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Full-Text Articles in Engineering
Modeling Nonlinear Behavior In A Piezoelectric Actuator, Hanz Richter, Eduardo A. Misawa, D. A. Lucca, H. Lu
Modeling Nonlinear Behavior In A Piezoelectric Actuator, Hanz Richter, Eduardo A. Misawa, D. A. Lucca, H. Lu
Mechanical Engineering Faculty Publications
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 …