A discrete-time compensation algorithm for hysteresis in piezoceramic actuators

• Published in: Mechanical systems and signal processing 2004, Vol.18 (1), p.169-185
• Main Authors: Hu, H., Ben Mrad, R.
• Format: Article
• Language: English
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/S0888-3270(03)00021-9

A discrete-time Preisach model that captures hysteresis in a piezoceramic actuator is developed. The model is implemented using a numerical technique that is based on first-order reversal functions and is presented in a recursive form that is amenable for real-time implementation. The first-order reversal functions are experimentally obtained using a piezoceramic actuator in a stacked form. The developed model shows good agreement with actual measured data. Two hysteresis compensation schemes based on the developed discrete-time Preisach model are also developed and used in order to obtain any desired linear voltage-to-displacement relationship. The ability of the first hysteresis compensator to lead to an arbitrary linear voltage-to-displacement relationship is shown through experimental tests under the condition that no-load is applied to the actuator and then a load typical of many piezoactuator applications is applied to the actuator. The second hysteresis compensation scheme is used as part of an open-loop tracking controller and is shown experimentally to lead to high tracking accuracy.