Experimental Implementation of a Hybrid Nonlinear Control Design for Magnetostrictive Transducers
Publication Type:
Journal
Authors:
Co-Authors:
Evans, P.G., Smith, R.C., and Dapino, M.J.
Year Published:
2009
Abstract:
A hybrid nonlinear optimal control design is experimentally implemented on a magnetostrictive Terfenol-D actuator to illustrate enhanced tracking control at relatively high
speed. The control design employs a homogenized energy model to quantify ratedependent nonlinear and hysteretic ferromagnetic switching behavior. The homogenized
energy model is incorporated into a finite-dimensional nonlinear optimal control design
to directly compensate for the nonlinear and hysteretic magnetostrictive constitutive behavior of the Terfenol-D actuator. Additionally, robustness to operating uncertainties is
addressed by incorporating proportional-integral (PI) perturbation feedback around the
optimal open loop response. Experimental results illustrate significant improvements in
tracking control in comparison to PI control. Accurate displacement tracking is achieved
for sinusoidal reference displacements at frequencies up to 1 kHz using the hybrid nonlinear control design, whereas tracking errors become significant for the PI controller for
frequencies equal to or greater than 500 Hz
Journal:
Journal of Dynamic Systems, Measurement, and Control
Volume:
131
Issue:
4
Pagination:
041004-041015
ISSN:
Short Title:
Date Published:
7/1/2009
DOI: