Design and performance of a compact stick-slip type piezoelectric actuator based on right triangle flexible stator

Abstract

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.

Development of a bipedal piezoelectric actuator with flexible mechanism based on the frog-leg inspiration

“…This actuator used four PZT stacks and two of them were nested into umbrella-shaped flexure mechanism. The maximum velocity was 1.132 mm/s and the maximum vertical loading capacity was 7 N under the voltage of 120 V. Wang et al (2022b) developed a piezoelectric stick-slip actuator by inserting the PZT stack in a right triangle flexible stator. Their actuator obtained the maximum speed of 4.6 mm/s when the frequency was 720 Hz, and the maximum output force was tested as 1.5 N. It can be seen that the developed piezoelectric actuator based on frog-leg inspiration in this work obtained relative better output performance than some existing works, especially on the loading capacity.…”

“…The existing piezoelectric actuators can be classified into diverse categories according to their principles. For example, ultrasonic motor, inchworm actuator, and inertial actuator are three main kinds for long-stroke motions (Dong et al, 2020;Li et al, 2020aLi et al, , 2021Liu et al, 2022b;Wang et al, 2022b). In recent years, the inertial piezoelectric actuator has been aroused wide interests due to the simple exciting signal, large stroke, and high accuracy (Qiao et al, 2022;Qin et al, 2019b;Zhang et al, 2019).…”

Research on variable stiffness asymmetrical resonant linear piezoelectric actuator based on multi-modal drive

“…Inertial impact piezoelectric motors can be divided into two types according to different driving mechanisms: electric signal control [24] and mechanism control [25]. Electronic motors can be mainly divided into 'stick-slip' drive type [26] and smooth impact type. Generally, both use asymmetric electrical signals (sawtooth waves) to excite the inertial impact block to generate asymmetric periodic motion to drive the motor to achieve motion [27].…”

Bionic Stepping Motors Driven by Piezoelectric Materials

“…As the core unit of energy conversion, motors with excellent performance usually play a crucial role in many scientific and engineering fields [1][2][3]. Generally, positioning accuracy, working stroke, loading capability, operating velocity, motion resolution, and overall dimensions are the most important performance criteria for high-end motors [4,5].…”