Modeling a hysteretic piezoelectric actuator employing a modified Bouc-Wen model

The present paper addresses the modeling of a hysteretic piezoelectric actuator. The model employed is that of Bouc-Wen. The Bouc-Wen model consists in a first-order nonlinear state equation, and an output equation where the input and state signals appear linearly. The model is modified to describe with a reasonable precision the experimentally observed hysteretic behavior of a piezoelectric actuator. A new identification technique is presented and applied to the piezoelectric actuator. The model is validated by means of experiments.