Preisach modeling of hysteresis for piezoceramic actuator system

Smart materials such as piezoceramics are being widely used as actuators and sensors to achieve micro-positioning and active control put-poses. However, a major limitation of piezoceramic actuators is their lack of accuracy due to hysteresis. The Preisach model is one of the most useful models to handle hysteresis and has recently been applied to the piezoceramic material systems. Since most of the previous applications of the Preisach model are in the ferromagnetic area, the developed identification and numerical implementation approaches are based on the ferromagnetic material properties. In order to successfully model the hysteresis for piezoceramic actuator system, modifications on the identification and numerical implementation methods of the Preisach model are needed due to the differences in the hysteresis behavior between the magnetic and piezoceramic materials systems. This paper discusses the adaptation of the Preisach model to describe the hysteresis behavior of piezoceramic actuator system and presents a modified geometric interpretation and numerical implementation method for the Preisach model especially for the hysteresis modeling of piezoceramic actuator system. The demagnetized state which refers both input and output equal zero states and the generalized demagnetized state are used as the basis of Preisach model rather than the saturation states. Experiments on the hysteresis behavior of a piezoceramic actuator were carried out and the experimental measurements are compared to the hysteresis predictions. The comparison results verify the application of the modified Preisach model to piezoceramic material system. (C) 2002 Published by Elsevier Science Ltd.