A Novel Rotation-Structure Based Stick-Slip Piezoelectric Actuator with High Consistency in Forward and Reverse Motions

Under the same driving voltage and frequency, forward reverse motion inconsistency of stick-slip piezoelectric actuators would bring difficulty for subsequent control. To solve this problem, a rotation-structure based actuator with completely symmetric structure two feet was initially proposed. By testing its output performances under various voltages frequencies, it confirmed that, although similar speeds could be achieved motions, maximum displacement backward in each step were still quite different. analyzing reasons leading to difference, further improved by using only one foot. The experimental results showed that consistency had been significantly improved. deviation rate 1.6%, corresponding travel distance 118.7 μm, obtained 100 V frequency 10 Hz. comparison some previously reported advancement actuator.