Piezoelectric inertial rotary actuators based on asymmetrically clamping structures

2019

Micromachines

The working principle of a rotating micro-actuator based on a piezoelectric stack was theoretically analyzed and experimentally verified. The actuator is compact in structure, and the key component is the shearing piezoelectric stack. The piezoelectric stack is used to drive the micro-rotor via an electromechanical transition, which produces high-speed rotation of the micro-rotor. We first established the dynamic model of the micro-actuator and numerically analyzed the motion of this model. The step displacement output was observed by simulation, and the step increment is quite large. For experimental verification, we fabricated the piezoelectric micro-actuator with a size of 12 mm × 10 mm × 8 mm and mass of 4.12 g and conducted a series of experiments. The results show qualitative agreement with the theoretical results; the maximum output speed of the micro-actuator is 5.86 × 10 5 μ rad/s, and the motion resolution is 0.64 μ rad, which is greater than that of most traditional piezoelectric actuators. The proposed micro-actuator offers superior performance in driving of selected small objects, such as in micro-/nano-processing and cell operation.

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Experimental Research of a Rotary Micro-Actuator Based on a Shearing Piezoelectric Stack

Huang

2019

Micromachines

“…It can be surface bonded to the structure with minimal modification of the original structure or embedded in composite laminate structures. Based on the working principles, PZT actuators are characterized into direct driving type [ 10 ], ultrasonic type [ 11 ], inchworm type [ 12 ], and inertial types [ 13 ]. Sharma et al [ 14 ] proposed a Lead Zirconate-Titanate (PZT)/poly-dimethylsiloxane (PDMS)-based flexible composite and investigated its application in the active damping of vibration control.…”

Section: Introductionmentioning

confidence: 99%

Deformation of Composite Laminates Induced by Surface Bonded and Embedded Piezoelectric Actuators

Her¹,

Chen²

2020

Materials

In this work, piezoelectric (PZT) actuators were surface bonded on or embedded in a composite laminate and subjected to an electric voltage across the thickness, resulting in a bending effect on the composite laminate. An analytical expression of the deflection of a simply supported cross-ply composite laminate induced by distributed piezoelectric actuators was derived on the basis of classical plate theory and composite mechanics. The theoretical solution can be used to predict the deformation of the composite laminate. Series of parametric studies were performed to investigate the effects of location, size, and embedded depth of PZT actuators on the composite laminate deformation. The analytical predictions were verified with finite element results. A close agreement was achieved. It demonstrated that the present approach provided a simple solution to predict and control the deformed shape of a composite laminate induced by distributed PZT actuators.

“…Facing the continuous increase in functional demands, many types of precision actuators such as magnetic actuators (Shutov et al, 2005;Yajima et al, 2000) and piezoelectric actuators (Cheng et al, 2015;Li et al, 2015;Peng et al, 2015Peng et al, , 2016Wang et al, 2015Wang et al, , 2016Yan et al, 2005) are being actively developed. Compared with magnetic actuators, piezoelectric actuators are more distinguished due to their attractive advantages such as mechanical simplicity, quick response, and electromagnetic immunity (Cheng et al, 2015;Li et al, 2015;Peng et al, 2015Peng et al, , 2016Shutov et al, 2005;Wang et al, 2015Wang et al, , 2016Yajima et al, 2000;Yan et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Novel design, analytical and experimental studies of a piezoelectric ultrasonic linear actuator based on binate feet driving

Rong

Journal of Intelligent Material Systems and Structures

et al. 2017

This article presents the piezoelectric ultrasonic linear actuator based on binate feet driving. The actuator is equipped with a rhombus binate feet mechanism to generate two synchronous rectangle driving trajectories. With the help of the two synchronous trajectories, the proposed actuator can deliver stable long-range motion (the designed maximum stroke is 19 mm) accompanying with large loading capacity and high driving resolution. The configuration and operational principle are described in detail and the driving trajectory of the binate feet is analyzed. Finite element analysis is conducted to investigate the static deformation and stress status of the driving mechanism at every step. The experimental system is established to test the performance of the actuator prototype and the results indicate that the prototype can be operated stably step by step and all steps have high reproducibility. The driving resolution (minimum step length) of the actuator prototype is 25.9 nm. The maximum loading capacity and the maximum thrust are 37.2 and 3.2 N, respectively. The experimental results also confirm that the designed actuator can achieve various motion velocities by changing the driving voltage and driving frequency.