Reduced hysteresis model and temperature dependency of multilayer piezo actuators

Multilayer piezoelectric actuators, typically used in nano-positioning applications under high electrical field excitation, are affected by hysteresis, which limits their applications in terms of open-loop positioning and stability in closed-loop systems. In this paper, a reduced Preisach model superimposed to a linear response is applied. With only 5 parameters, the model shows a good match to experimental data, with peak errors below 1%. The variation of model parameters with temperature is analyzed in the range 25–200°C. Results show that the linear term increases while the Preisach density becomes narrower at high temperature, exemplifying the higher domain wall mobility. Such a model can be used within a feed-forward control to improve positioning accuracy and reduce response time.