Modelling and Simulation of Shape Memory Alloys Micro-Actuator

In recent years, the Preisach model has emerged to capture the complex hysteresis behavior of many smart material, such as piezoceramics, shape memory alloys (SMA) and so forth. This paper addressed modeling and simulation of the micro-actuator SMA wires. We introduce the numerical implementation of the Preisach model, which avoids the double integration and using experimental data directly. For the explore of the model, the novel concept of input memory matrix MU_t and output memory matrix MF_t is introduced in the paper. These concept is useful not only for the numerical implementation of the Preisach model but also for its theoretical investigation as well. A experimental configuration has been constructed to obtain the data we need for the modeling. A good quantitative match is observed between model output and experimental data. Some theoretical explore of the Preisach model can be applied to a wide class of smart material actuators.