A trapezoid-type stick–slip piezoelectric linear actuator using a right circular flexure hinge mechanism was proposed, designed, fabricated, and tested with the aim of accomplishing driving based on motion. The angle adjustment trapezoid beam used for generating lateral motion foot mechanism. method tuning discussed. Based finite-element method, proper obtained. analysis results proved that asymmetrical can increase static friction force in slow extension stage decrease kinetic quick...

A resonant/off-resonant hybrid excitation of a piezoelectric stick–slip actuator is proposed in this paper. It accomplished by resonant sinusoidal friction regulation wave (RSFR-wave) and an off-resonant saw-tooth (ORST-wave). The RSFR-wave applied to the rapid deformation stage ORST-wave. In stage, first-order longitudinal vibration mode stator can be obtained. By mode, kinetic between slider frictional rod obviously decreased utilizing ultrasonic reduction. backward displacement remarkably...

The smooth impact drive mechanism (SIDM) is a type of piezoelectric actuator that has been developed for several decades. As kind driving method the SIDM, traditional sawtooth (TS) wave always employed. kinetic friction force during rapid contraction stage usually results in generation backward motion. A regulation hybrid (FRH) realized by composite waveform motion restraint SIDM proposed this paper. composed (SD) and sinusoidal (SFR) which applied to deformation SD wave. prototype was...

In the field of piezoelectric actuators, high speed stick-slip actuators have received considerable attention. A linear actuator is proposed in this article, which combines asymmetric flexure hinge with triangular displacement amplification mechanism. The designed can achieve at lower frequency. configuration and driving principle are illustrated by theory simulation. order to study its performance, a prototype fabricated, an experimental system established. results confirm that maximum step...

This paper presents a lever-type stick-slip piezoelectric actuator based on the lever amplification principle. The proposed can achieve large strokes, high velocity, and bidirectional actuation with single stack. finite element simulation of flexible hinge is performed, designed prototype tested. When voltage 100 Vp-p, maximum forward velocity 7.69 mm/s under symmetry 20%. reverse 7.12 80%. displacement deviation within 10 cycles 0.88 μm, load reach 105 g.

This article presented a new type of stick-slip piezoelectric actuator based on an asymmetrical flexure hinge driving mechanism. The key the mechanism was four-bar with different minimum thicknesses right-circle hinges. Combined symmetrical indenter, generated controllable tangential displacement by changing locking force. Therefore, simple structured achieved considerable improvements especially in output speed and efficiency. In order to obtain improved properties, mechanism, normal...

In this paper, a sealed piezoelectric energy harvester is fabricated to investigate the performance of proposed when driven by hyperbaric air load. The consists flexible piezoceramic patch and closed chamber. from can be harvested through deformation lead zirconate titanate patch. A test system built prototype device tested under various experimental conditions. results show that generation tuned varying its parameters. output voltage shows an obvious increase with increasing cycle time....

Rotational motion generates energy extractable by the harvester for powering electronic devices and is also useful self‐powered sensing. An integrated triboelectric–electromagnetic–piezoelectric hybrid induced a multifunction magnet rotational designed investigated herein. The installed on rotating disc to create motion. A cylindrical NdFeB permanent (Magnet I) acts as key movable component, reciprocating in an acrylic cylinder rotates. Magnet I interacts with three different generators...

This paper presents a stick-slip linear piezoelectric actuator with mode conversion flexible hinge driven by symmetrical waveform. The structure of chutes will make driving foot achieve lateral motion and slider move steady. different angles are analyzed finite element method the influence on properties is researched. optimal angle can be found prototype manufactured as well. In addition, an experimental system established well series experiments. output characteristic researched locking...

In order to obtain the high velocity in compact size, a piezoelectric stick-slip linear actuator is proposed this paper. The adopts rhombus-type flexure hinge mechanism which can be used as displacement amplifier easily produce parasitic motion. working principle of discussed, and finite element method adopted verify generation motion mechanism. A prototype manufactured investigate performance. achieves maximum 13.08 mm/s at frequency 570 Hz under sawtooth wave exciting voltage 100 Vp-p....

A stick-slip piezoelectric actuator with bidirectional motion is proposed and measured, which uses coupled asymmetrical flexure hinge mechanisms symmetrical indenter to generate controllable tangential displacement. The operating principle of the illustrated, normal force variation between stator slider analyzed. dynamic model based on method dimensionality reduction established simulate displacement load capacity. In order obtain improved properties, design rules are discussed,...

The performance of a piezoelectric energy harvester with coupling chamber was investigated under vortex-induced pressure. consisted power chamber, buffer, and storage chamber. Different types vortex (i.e., clockwise or counter-clockwise) could be induced by changing the volume ratio between peak voltage tuned ratio. For example, pressure 0.30 MPa, input cycle 2.0 s, flow rate 200 l/min, decreased from 79.20 to 70.80 V increasing optimal 2.03, which resulted in formation vortex. corresponding...

A high-thrust screw-type piezoelectric ultrasonic motor with a three-wavelength exciting mode is proposed in this paper. The mainly includes stator and screw output shaft, the composed of twelve rectangular plates hollow metal elastomer an internal thread. can be excited to generate combined micro vibration mode. With mode, traveling wave synthesized. used drive shaft by means frictional force between shaft. Rotary-linear motion achieved without any additional conversion mechanism. Large...

The piezoelectric generator with magnetic has been researched in many different fields. is used as power assisting device which can promoted the performance of generator. This paper presents a novel method that using small force to adjust electromechanical conversion efficiency circular diaphragm when hyperbaric air acts on it. induced pre-stress acted center surface charge distribution by changing displacement diaphragm. theoretical analysis and simulated research show repulsive increases...

Inspired from the special structure of dragonfly wings (cambered and corrugated groove), in this work, bioinspired dimple is introduced into design airfoil to improve power extraction performance a semi-active flapping airfoil, characteristic parameters are optimized by combination numerical analysis Taguchi method. The results show that can effectively airfoil. average coefficient efficiency 31.73% 31.23% higher than baseline smooth respectively, influence three considered on ranked as: lx...

Speciation of mercury in water and the air above was studied. The effects hydrogen peroxide, bacterial growth medium, both living dead bacteria (Escherichia coli Pseudomonas aeruginosa) were tested. Both transport metallic from into air. amount total Hg produced head space similar or peroxide systems, [Formula: see text]. Hydrogen stabilized 2+ system. Partition coefficients calculated corrected concentrations using literature solubility values for air/water phases. It is possible that 0...

Electro-pneumatic proportional valve, as an important electro-pneumatic conversion element in pneumatic technology, has been widely applied many servo control systems. A novel nozzle flapper pressure valve driven by piezoelectric motor instead of the traditional torque was proposed this paper. The structure and working principle type were described. And a mathematical model established. testing system developed prototype tested. Test results showed that under 0.3 MPa pressure, output...

The demand for energy-harvesting technology is steadily growing in the field of self-powered wireless sensor systems use pneumatic systems. purpose this research was to study an energy harvester excited by alternating air load a system. designed consist power chamber and compressed chamber, bottom piezoelectric patch as been affixed. changing pressure, which can be adjusted through volume, pressure harvested deformation patch. A test system built prototype device tested under various...

Currently, unmanned aerial vehicles (UAVs) play a pivotal role in meteorological wind speed measurements. Nevertheless, existing anemometers exhibit notable issues, including excessive weight, high cost and cut-in speed. This investigation introduces biomimetic owl wing airfoil sensor utilizing the principles of triboelectric nanogenerator (BOW-TENG) designed for UAV applications. Inspired by wings, an configuration with superior aerodynamic characteristics is ascertained, subsequently...

Piezoelectric energy harvests (PEHs) based on PVDF polymers have recently become a research hotspot due to their excellent flexibility and fatigue resistance. However, the lower power output compared PZT has always been challenge that restricted its practical application. In this study, we designed demonstrated highperformance pneumatic piezoelectric harvester (PPEH) polymer. The PPEH utilizes compact lever-type displacement amplification module with an ratio of 6:1, enabling large bending...