SHAPE-MEMORY ALLOY ACTUATOR AND DEVICE AND METHOD FOR CONTROLLING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a shape-memory alloy actuator control device with a low risk of damage to a shape-memory alloy member even when a shape-memory alloy actuator is constrained.;SOLUTION: A shape-memory alloy actuator control device 1 comprises: a resistance value measurement section 40 which measures a resistance value of a shape-memory alloy member 3; a target resistance value setting section 533 which sets a target resistance value in a manner that decreases in accordance with an elapse of current supply time to apply current to the shape-memory alloy member 3; a resistance difference calculation section 534 which calculates a resistance difference showing a difference between the resistance value measured by the resistance value measurement section 40 and the target resistance value; and a current application section 30 which applies the current in accordance with the resistance value to the shape-memory alloy member. The target resistance value setting section 533 changes the target resistance value to a predetermined value larger than the current target resistance value when determining that the resistance difference is larger than a threshold.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2017,JPO&INPIT