MODEL BASED CONTROL OF SHAPE MEMORY ALLOY DEVICE

摘要

A method of modeling a Shape Memory Alloy (SMA) element to predict a response of the SMA element includes obtaining the resistivity of the SMA element over a range of a physical property of the SMA element; correlating variations in the obtained resistivity with respect to the physical property of the SMA element to identify behavioral differences in the resistivity for the different phases of the SMA element; calculating a rate of change of the resistivity of the SMA element over a period of time; calculating the derivative of the rate of change in the resistivity of the SMA element over the period of time; and comparing real time data of the physical property to the derivative of the rate of change to predict the response of the shape memory alloy element.