Preisach Model Identiication of a Two-wire Sma Actuator

In recent years, the Preisach hysteresis model has emerged as the model of choice for the behaviour of many smart materials, such as shape memory alloys (SMA). This research treats the identi cation of Preisach models for a di erential SMA actuator. The traditional identi cation technique is applied, and several models are derived for the actuator. It is seen that the classical Preisach model is able to model its behaviour. However, the results raise questions concerning the robustness of the traditional identi cation technique, as well as the conservative nature of current passivity-based control results for the Preisach model.