An Optimal Model for Hysteretic Nonlinear Phenomenon in Piezoelectric Actuator via Evolutionary Programming Algorithm

摘要

Piezoelectric actuators are widely used in industry for ultra high precision machines. Their performance is influenced deeply by the nonlinearity of hysteresis. In this paper a differential model is used to describe the hysteresis and a novel evolutionary programming (EP) algorithm is developed to compute the optimal values of the parameters in this model. A numerical experiment exemplifies the modeling procedure. Comparison of our results with the experimental data reveals that the error is less than 14 nm.