In the field of stick-slip type piezoelectric actuators, the actuator with simple and compact structure has been given significant research and design value. A compact stick-slip piezoelectric actuator based on right triangle flexible stator is proposed and evaluated in this work. The proposed actuator only includes a right triangular type stator inserted with a PZT stack and it has the merit of simple structure. The PZT stack is excited under a sawtooth waveform voltage, and the elongation deformation of the PZT stack makes the driving foot move obliquely due to the right triangular stator. The slider is pressed under the vertical component of the oblique movement, while the slider is actuated under the horizontal component simultaneously. The working principle of the proposed actuator is illustrated by theoretical and simulation methods in detail. The proposed actuator is fabricated and its output characteristics are measured. The experimental results show that the maximum output speed of the developed actuator is 4.6 mm s−1 when the voltage and frequency are 100 V and 720 Hz. It has the merit of simple design and relatively better performance by series of comparisons with some existing works.
A new piezoelectric stick-slip actuator using stair type flexure hinge is proposed and developed in this work. It’s spirited by referencing the reported “Z-shaped” flexure hinge in the literatures and the idea of asymmetric structure. In this design, the PZT stack can generate elongation displacement under the excitation of sawtooth signal, and then the elongation can be transmitted into the vertical and horizontal displacements on the driving tip by the stair type flexure hinge. The slider is pressed by the vertical displacement and driven by the horizontal displacement, respectively. The working principle of the proposed actuator is clarified. The statics characteristics are investigated by the theoretical and simulation methods. Finally, the mechanical output characteristics of the developed prototype are tested. The maximum output velocity is 8.5 mm/s when the voltage and frequency are 100 V and 720 Hz. The maximum output force is tested as 2.6 N when the preloading force is 3 N. The experiment results validate the feasibility of the proposed piezoelectric stick-slip actuator based on stair type flexure hinge.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.