Abstract
Generally, a piezoelectric actuator requires continuous dc voltages to keep a certain piezoelectric displacement. This property can prevent from achieving low energy consumptions of a mobile device. The shape memory piezoelectric actuator doesn't need any continuous dc voltages to keep its piezoelectric displacement. The shape memory piezoelectric actuator can be operated by pulse shaped voltage sets. We had proposed the imprint electrical field control to obtain the shape memory effect. However, it has fatigue of the shape memory by continuous drive. In this study, new principle of the shape memory piezoelectric actuator is proposed and demonstrated. The shape memory piezoelectric actuator is realized by asymmetric voltage operation without imprint electrical field. The asymmetric pulsed operation realized in better fatigue endurance than previous study.
