Research

22 pages, 8886 KiB

Open AccessArticle

A Simple Model of the Energy Harvester within a Linear and Hysteresis Approach

by Mikhail E. Semenov, Peter A. Meleshenko, Sergei V. Borzunov, Olga O. Reshetova and Andrey I. Barsukov

Micromachines 2023, 14(2), 310; https://doi.org/10.3390/mi14020310 - 25 Jan 2023

Cited by 1 | Viewed by 1366

Abstract

In this article, a model of an energy harvester, the mechanical part of which is an inverted pendulum, is proposed. We investigated the stability of a linearized system. It was proven that the stabilizing control of the pendulum, based on the feedback principle, [...] Read more.

In this article, a model of an energy harvester, the mechanical part of which is an inverted pendulum, is proposed. We investigated the stability of a linearized system. It was proven that the stabilizing control of the pendulum, based on the feedback principle, enables the stabilization of the system. We have identified the zones of stability and the amplitude–frequency characteristics. In the second part of this article, a generalization of the dynamic system for the case of the hysteresis friction in the mechanical joint is considered. The role of nonlinear effects within the design Preisach model and the phenomenological Bouc–Wen model is shown. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

15 pages, 11606 KiB

Open AccessArticle

A Design Method of Traveling Wave Rotary Ultrasonic Motors Driving Circuit under High Voltage Using Single-Sided Hertzian Contact Forced Oscillator Model

by Xiaoniu Li, Tianlu Huang, Ning Zhao, Youtao Shen, Jiada Huang, Xuan Li, Jiayi Li and Lin Yang

Micromachines 2023, 14(1), 64; https://doi.org/10.3390/mi14010064 - 26 Dec 2022

Cited by 1 | Viewed by 1426

Abstract

Traveling wave rotary ultrasonic motors (TRUMs) are widely used in various industrial processes due to their attractive features, such as compact structure, high accuracy, and fast response. However, the major limiting factors of the operational performance of TRUMs under high-voltage excitation are the [...] Read more.

Traveling wave rotary ultrasonic motors (TRUMs) are widely used in various industrial processes due to their attractive features, such as compact structure, high accuracy, and fast response. However, the major limiting factors of the operational performance of TRUMs under high-voltage excitation are the nonlinear behavior caused by the nonlinearities of the piezoelectric materials and the friction between the stator and rotor of the motor. In this study, a nonlinear dynamics model and an identification method are presented to directly design the driver circuit for suppressing the nonlinear behavior under high voltage excitation. Firstly, by studying the time–frequency characteristics of the isolated electrode voltage, a single-sided Hertzian contact forced oscillator model of TRUMs is established, involving the nonlinearities of the piezoelectric material and friction. Secondly, a harmonic balance nonlinear identification is proposed in the time domain for TRUMs. The influence of the voltage and preload on the nonlinear phenomena is discussed. Lastly, a novel driver circuit is proposed to suppress the nonlinearities using feedback from the isolated electrode. Experiments showed that the total harmonic distortion decreased by 89.4% under 500 Vpp. The proposed drive circuit design method is used to find a high excitation voltage and preload to achieve greater motor output power. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

16 pages, 4782 KiB

Open AccessArticle

High-Level Vibration for Single-Frequency and Multi-Frequency Excitation in Macro-Composite Piezoelectric (MFC) Energy Harvesters, Nonlinearity, and Higher Harmonics

by Majid Khazaee

Micromachines 2023, 14(1), 1; https://doi.org/10.3390/mi14010001 - 20 Dec 2022

Viewed by 1333

Abstract

This paper presents an extensive experimental investigation to identify the influence of signal parameters on a piezoelectric harvester’s performance. A macro-fibre composite energy harvester was studied as an advanced, flexible, high-performance energy material. Gaussian white noise, and single-frequency and multi-frequency excitation were used [...] Read more.

This paper presents an extensive experimental investigation to identify the influence of signal parameters on a piezoelectric harvester’s performance. A macro-fibre composite energy harvester was studied as an advanced, flexible, high-performance energy material. Gaussian white noise, and single-frequency and multi-frequency excitation were used to investigate nonlinearity and multiple-frequency interactions. Using single low and high frequencies, we identified the nonlinearity of the harvester’s vibration. Multi-frequency excitation with a series of low-to-high-frequency harmonics mimicked the practical vibration signal. Under such multi-frequency excitation, the harvester’s nonlinear behaviour was studied. Finally, the interaction effects among multiple frequencies were identified. The results show that under pure resonant excitation, high-level vibration led to high-level mechanical strain, which caused nonlinear vibration behaviour. Moreover, it was shown that the different harmonics excited the various structure bending modes, which caused the nonlinearity of multi-frequency excitation. The first four harmonics of the real-time signal were important. The experimental results emphasise the resonant nonlinearity and interactions of multi-frequency excitation effects. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

19 pages, 8024 KiB

Open AccessArticle

Tiny Piezoelectric Multi-Layered Actuators with Application in a Compact Camera Module—Design, Fabrication, Assembling and Testing Issues

by Chao-Ping Lee, Mi-Ching Tsai and Yiin-Kuen Fuh

Micromachines 2022, 13(12), 2126; https://doi.org/10.3390/mi13122126 - 01 Dec 2022

Viewed by 1612

Abstract

Piezoelectric actuators with multi-layer structures have largely gained attention from academic and industry experts. This is due to its distinctive advantages of fast response time, huge generative force and the inherent good planar electromechanical coupling factor, as well as other mechanical qualities. Typically, [...] Read more.

Piezoelectric actuators with multi-layer structures have largely gained attention from academic and industry experts. This is due to its distinctive advantages of fast response time, huge generative force and the inherent good planar electromechanical coupling factor, as well as other mechanical qualities. Typically, lead zirconate titanate (PZT) is one of the most represented piezoelectric ceramic materials that have been used for multi-layer piezoelectric actuators. Piezoelectric multi-layered actuators (PMLAs) were developed vigorously in the past decades due to the emergence of portable devices, such as smartphones with a highly compact camera module (CCM) and an image stabilizer (IS). This study reviewed the progress made in the field of PMLA applications, with a particular focus on the miniaturized dimensions and associated generated output force, speed and maximum output power requirement for various loads. Several commercial attempts, such as Helimorph, Lobster and the two-degrees-of-freedom ultrasonic motor (USM), were investigated. The proposed simple bimorph and multi-layer bimorph USMs experimentally showed thrust as high as 3.08 N and 2.57 N with good free speed and structural thicknesses of 0.7 and 0.6 mm, respectively. When compared with the other 14 reported linear USMs, they ranked as the top 1 and 2 in terms of the thrust-to-volume ratio. The proposed design shows great potential for cellphone camera module application, especially in moving sensor image stabilization. This study also provided outlooks for future developments for piezoelectric materials, configurations, fabrication and applications. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

14 pages, 10973 KiB

Open AccessArticle

An Optimization Design Method of Rigid-Flexible Soft Fingers Based on Dielectric Elastomer Actuators

by Fuhao Ouyang, Yuanlin Guan, Chunyu Yu, Xixin Yang, Qi Cheng, Jiawei Chen, Juan Zhao, Qinghai Zhang and Yang Guo

Micromachines 2022, 13(11), 2030; https://doi.org/10.3390/mi13112030 - 19 Nov 2022

Cited by 1 | Viewed by 1409

Abstract

The soft gripper has received extensive attention, due to its good adaptability and flexibility. The dielectric elastomer (DE) actuator as a flexible electroactive polymer that provides a new approach for soft grippers. However, they have the disadvantage of having a poor rigidity. Therefore, [...] Read more.

The soft gripper has received extensive attention, due to its good adaptability and flexibility. The dielectric elastomer (DE) actuator as a flexible electroactive polymer that provides a new approach for soft grippers. However, they have the disadvantage of having a poor rigidity. Therefore, the optimization design method of a rigid-flexible soft finger is presented to improve the rigidity of the soft finger. We analyzed the interaction of the rigid and soft materials, using the finite element method (FEM), and researched the influence of the parameters (compression of the spring and pre-stretching ratio of the DE) on the bending angle. The optimal parameters were obtained using the FEM. We experimentally verified the accuracy of the proposed method. The maximum bending angle is 19.66°. Compared with the theoretical result, the maximum error is 3.84%. Simultaneously, the soft gripper with three fingers can grasp various objects and the maximum grasping quality is 11.21 g. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

32 pages, 8138 KiB

Open AccessArticle

A Multi-Point Contact Model Considering Rough Surface for Linear Ultrasonic Motors: Validation and Simulation

by Ying He, Zhiyuan Yao and Hao Xu

Micromachines 2022, 13(11), 1988; https://doi.org/10.3390/mi13111988 - 16 Nov 2022

Viewed by 1160

Abstract

The performance and wear life of linear ultrasonic motors are directly determined by the stator–mover frictional contact behaviors. A complete contact model is important to clearly understand the stator–mover contact mechanism and accurately estimate the motor performance. In this paper, a multi-point frictional [...] Read more.

The performance and wear life of linear ultrasonic motors are directly determined by the stator–mover frictional contact behaviors. A complete contact model is important to clearly understand the stator–mover contact mechanism and accurately estimate the motor performance. In this paper, a multi-point frictional contact model considering the roughness of contact interfaces is presented based on a finite model of the stator and an analytical model of the mover. The static/dynamic contact behaviors and output performance of the motor can be simulated efficiently. A quantitative measuring methodology for the dynamic contact forces between the stator and mover is developed. The effectiveness of the contact model for simulating the stator–mover contact forces is first evaluated by experiment. Based on the developed model, several dynamic characteristics of a linear ultrasonic motor are discussed: (a) the static force transferred between contact interfaces under pre-pressure; (b) the transient forces and energy exchange between contact interfaces; (c) the steady-state output performance of motor under different electric excitation parameters; (d) the effects of micro-topography parameters on the output performance of the motor and the force transmission of the contact interface. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

18 pages, 6891 KiB

Open AccessArticle

Ring-Shaped Piezoelectric 5-DOF Robot for Angular-Planar Motion

by Andrius Čeponis, Dalius Mažeika, Vytautas Jūrėnas, Dovilė Deltuvienė and Regimantas Bareikis

Micromachines 2022, 13(10), 1763; https://doi.org/10.3390/mi13101763 - 18 Oct 2022

Cited by 3 | Viewed by 1170

Abstract

This paper provides numerical and experimental investigations of a ring-shaped piezoelectric 5-DOF robot that performs planar and angular motions of spherical payload. The robot consists of a piezoelectric ring glued on a special stainless-steel ring with three spikes oriented in the radial direction [...] Read more.

This paper provides numerical and experimental investigations of a ring-shaped piezoelectric 5-DOF robot that performs planar and angular motions of spherical payload. The robot consists of a piezoelectric ring glued on a special stainless-steel ring with three spikes oriented in the radial direction of the ring. The spherical payload is placed on top of the piezoelectric ring and is moved or rotated when a particular excitation regime is used. An alumina oxide ball is glued at the end of each spike of the steel ring and is used as contacting element. The spikes are used to transfer vibrations of the piezoelectric ring to contacting elements and to induce the planar motion of the payload. Additionally, three alumina oxide balls are glued on the top surface of the piezoelectric ring and are used to generate rotational motion of the spherical payload by impacting it. Finally, the top electrode of the piezoceramic ring is divided into six equal sections and is used to control the direction of angular and planar motion of the payload. Numerical modeling of the robot showed that vibration modes suitable for angular and planar motions are obtained at a frequency of 28.25 kHz and 41.86 kHz, respectively. Experimental investigation showed that the maximum angular velocity of the payload is 30.12 RPM while the maximum linear motion of the robot is 29.34 mm/s when an excitation voltage of 200 V_p-p was applied and a payload of 25.1 g was used. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

13 pages, 7060 KiB

Open AccessArticle

Working Mechanisms and Experimental Research of Piezoelectric Pump with a Cardiac Valve-like Structure

by Jiayue Zhou, Wanting Sun, Jun Fu, Huixia Liu, Hongmei Wang and Qiufeng Yan

Micromachines 2022, 13(10), 1621; https://doi.org/10.3390/mi13101621 - 28 Sep 2022

Cited by 2 | Viewed by 1823

Abstract

In this study, based on the working principle of the cardiac valve structure that prevents blood from flowing back, a piezoelectric pump with a cardiac valve-like structure (PPCVLS) is designed. The operating principles of cardiac-valve-like structures (CVLSs) are introduced. Furthermore, the closure conditions [...] Read more.

In this study, based on the working principle of the cardiac valve structure that prevents blood from flowing back, a piezoelectric pump with a cardiac valve-like structure (PPCVLS) is designed. The operating principles of cardiac-valve-like structures (CVLSs) are introduced. Furthermore, the closure conditions of the CVLSs on both sides of the flow channel are explored. The principle behind the working-state conversion between “valve-based” and “valve-less” of PPCVLS is also analyzed. A high-speed dynamic microscopic image-analysis system was utilized to observe and verify the working-state conversion between “valve-based” and “valve-less” PPCVLSs. The resonant frequency of the piezoelectric pump was measured by Doppler laser vibrometer, and the optimal working frequency of the piezoelectric vibrator was determined as 22.35 Hz. The prototype piezoelectric pump was fabricated by the 3D printing technique, and the output performance of the piezoelectric pump was also evaluated. The experimental results show that the piezoelectric pump is valve-based when the driving voltage is greater than 140V, and the piezoelectric pump is valve-less when the driving voltage is less than 140 V. Furthermore, the maximum output pressure of the piezoelectric pump was 199 mm H₂O when driven by the applied voltage of 220 V at 7 Hz, while the maximum flow rate of the piezoelectric pump was 44.5 mL/min when driven by the applied voltage of 220 V at 11 Hz. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

14 pages, 3284 KiB

Open AccessArticle

Analysis and Optimization of a Microgripper Driven by Linear Ultrasonic Motors

by Ranran Geng, Zhiyuan Yao, Yuqi Wang, Jiacai Huang and Hanzhong Liu

Micromachines 2022, 13(9), 1453; https://doi.org/10.3390/mi13091453 - 02 Sep 2022

Cited by 1 | Viewed by 1294

Abstract

This paper presents the vibration response analysis and optimal structural design of a microgripper driven by linear ultrasonic motors (LUMs) dedicated to improving end-point positioning accuracy. Based on structural vibration theory, a parametric vibration response model of the microgripper finger was established, and [...] Read more.

This paper presents the vibration response analysis and optimal structural design of a microgripper driven by linear ultrasonic motors (LUMs) dedicated to improving end-point positioning accuracy. Based on structural vibration theory, a parametric vibration response model of the microgripper finger was established, and the relative sensitivities of the structural and material parameters that affect the vibration amplitude of the fingertip were calculated within the structural and material constraints. Then, according to the sensitivity calculation results, a multidimensional constrained nonlinear optimization model was constructed to suppress the vibration of the end-effector. The improved internal penalty function method combined with Newton iteration was adopted to obtain the optimal structural parameters. Finally, the vibration experimental results show that the vibration amplitude of the initial microgripper fingertip is 16.31 μm, and the value measured after optimization was 2.49 μm, exhibiting a reduction of 84.7%. Therefore, the proposed optimal design method can effectively restrain the vibration of the microgripper end-effector and improve manipulation stability. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

19 pages, 7187 KiB

Open AccessArticle

Integrated Physical Modeling and Optimal Control Method of Limited-Angle Torque Motor in Fuel Metering Apparatus

by Qian Chen, Hanlin Sheng and Shengbin Jiang

Micromachines 2022, 13(6), 949; https://doi.org/10.3390/mi13060949 - 15 Jun 2022

Cited by 3 | Viewed by 1540

Abstract

Limited-angle torque motor (LATM) is a critical component to precisely drive the valve angle of an engine’s fuel metering apparatus and accurately measure the fuel flow, and research on it is of great significance. Thus, the LATM of a certain kind is regarded [...] Read more.

Limited-angle torque motor (LATM) is a critical component to precisely drive the valve angle of an engine’s fuel metering apparatus and accurately measure the fuel flow, and research on it is of great significance. Thus, the LATM of a certain kind is regarded as the research object in this paper. Firstly, a Simscape-based LATM integrated physical modeling method is proposed, which can better demonstrate the real operational characteristics of a motor, compared with the current mathematical model. Secondly, a Proportional-Integral-Derivative (PID) parameter self-tuning method based on a constriction factor particle swarm optimization (CPSO) algorithm is broached since it is difficult to tune due to a large number of multi-loop cascade PID control parameters. Simulation and experimental results showed that the control performance increases by 40% in the triple closed-loop PID control system with a stronger disturbance rejection, simpler design, and quickly responds when compared with the previous empirical tuning method. The triple closed-loop PID control system comprises an angle loop + angle velocity loop + current loop and technically supports the engineering application design of motors. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

17 pages, 8027 KiB

Open AccessArticle

Design of a Magnetically Anchored Laparoscope Using Miniature Ultrasonic Motors

by Jingwu Li, Zhijun Sun, He Yan and Jinyan Chen

Micromachines 2022, 13(6), 855; https://doi.org/10.3390/mi13060855 - 30 May 2022

Cited by 1 | Viewed by 1614

Abstract

Images taken by an endoscope in single-port-access surgery are the most important information for directing surgeons to operate, so acquiring images taken at better position and a more desired perspective has profound significance for improving the efficiency and safety of surgery. The magnetically [...] Read more.

Images taken by an endoscope in single-port-access surgery are the most important information for directing surgeons to operate, so acquiring images taken at better position and a more desired perspective has profound significance for improving the efficiency and safety of surgery. The magnetically anchored laparoscope can help to realize this goal compared with the traditional laparoscope used in single-port-access surgery. In this paper, we propose the concept of applying ultrasonic motors in the magnetically anchored laparoscope. Two types of ultrasonic motors used for driving the laparoscope, namely a miniature traveling wave-rotating ultrasonic motor and a miniature traveling wave-tilt ultrasonic motor, are designed. The prototype of the magnetically anchored laparoscope using these two types of ultrasonic motors is fabricated and evaluated by experiments. The results show that the maximum output torque of the miniature traveling wave-rotating ultrasonic motor is 1.2 mN·m, and that of the miniature traveling wave-tilt ultrasonic motor is 1.4 mN·m, which is enough to actuate the magnetically anchored laparoscope. Additionally, it is proven that the two designed ultrasonic motors can be applied successfully in the laparoscope. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

14 pages, 4767 KiB

Open AccessArticle

Research on Locally Resonant Characteristics of Pipelines with Periodic Structure

by Xingsheng Lao, Yonghua Yu, Fan Zhang, Jinxiao Ye, Xiangxi Xu and Zhaowang Xia

Micromachines 2022, 13(6), 850; https://doi.org/10.3390/mi13060850 - 29 May 2022

Cited by 1 | Viewed by 1233

Abstract

In this paper, the propagation characteristics of vibration waves in periodic pipelines were studied based on the band theory of phononic crystals, and we analyzed the influence of the geometrical structure parameters on the band gap characteristics of pipelines. The results show that, [...] Read more.

In this paper, the propagation characteristics of vibration waves in periodic pipelines were studied based on the band theory of phononic crystals, and we analyzed the influence of the geometrical structure parameters on the band gap characteristics of pipelines. The results show that, by increasing the number of layers of local resonant structure, both the initial frequency and the cutoff frequency of the band gap moved towards the lower frequency, while the width of the system band gap increased by 35 Hz, and the damping effect increased by 18.3 dB. By changing the thickness of the wall of the pipeline system, the width of the system band gap increased by 20 Hz, and the damping effect increased by 9.1 dB. The maximum vibration isolation of the offshore platform truss based on the periodic structure can be up to 7.93 dB. Therefore, it is feasible to apply the local resonant periodic structure to the vibration control of a practical offshore platform. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

11 pages, 3195 KiB

Open AccessArticle

Position Detection Method of Piezoelectric Driven Spherical Motor Based on Laser Detection

by Zheng Li, Yiding Zhu, Bo Xie, Ye Wang, Xiaoqiang Guo and Hexu Sun

Micromachines 2022, 13(5), 662; https://doi.org/10.3390/mi13050662 - 23 Apr 2022

Cited by 5 | Viewed by 1517

Abstract

Laser detection technology has manypromising applications in the field of motor speed and position measurement. Accurate and fast measurement of position information of spherical rotor is very important for motor control. In this paper, we propose a method for non-contact measurement of the [...] Read more.

Laser detection technology has manypromising applications in the field of motor speed and position measurement. Accurate and fast measurement of position information of spherical rotor is very important for motor control. In this paper, we propose a method for non-contact measurement of the angular velocity of a multi-DOF spherical motor using the Doppler effect of the laser, and further obtain the position information of the motor rotor. The horizontal laser beam from the laser generator is divided into a reference beam I and a measurement beam II through a beam splitter, and the measurement beam II reflects and undergoes Doppler effect after irradiating the rotating motor. The two beams pass through the photoelectric conversion module to obtain the corresponding frequency difference signals to derive the angular velocity and position information of the motor rotor. The correctness of the method is verified experimentally. The results show that the coordinate error of Z and Y axes is less than 2 mm, thatthe error of Z-axes is less than 0.2 mm, and that the method can better measure the spherical rotor position information of the motor. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

14 pages, 26476 KiB

Open AccessArticle

Design and Dynamic Simulation of a Novel Traveling Wave Linear Ultrasonic Motor

by Lin Yang, Kaixi Yao, Weihao Ren, Liang Chen, Mojian Yang, Rongcheng Zhao and Siyu Tang

Micromachines 2022, 13(4), 557; https://doi.org/10.3390/mi13040557 - 31 Mar 2022

Cited by 2 | Viewed by 1710

Abstract

To overcome the problem of frequency consistency and simplify the design process of linear ultrasonic motor, a novel traveling wave linear ultrasonic motor with a ring-type stator is proposed in this paper. The combination of two orthogonal bending vibration modes with the same [...] Read more.

To overcome the problem of frequency consistency and simplify the design process of linear ultrasonic motor, a novel traveling wave linear ultrasonic motor with a ring-type stator is proposed in this paper. The combination of two orthogonal bending vibration modes with the same order is selected as the operating mode of the motor. A traveling wave along the side of the stator is utilized to drive the slider to move linearly. The stator adopts a ring symmetrical structure, which can effectively ensure that the resonance frequencies of the two vibration modes are consistent. Thus, we do not need to tune the frequencies of the two vibrations by constantly adjusting the shape of the stator or designing complex clamping parts to fix the stator without making any influence on the vibrations. Meanwhile, a three-dimensional finite element model of the motor is built. Using the model, we obtain the elliptical motion trajectories of the stator driving surface, the output performance of the motor, the sticking-slipping-separation contact characteristic between the stator and the slider and fabricate and measure a prototype of the proposed motor. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

12 pages, 4780 KiB

Open AccessArticle

Long Stroke Design of Piezoelectric Walking Actuator for Wafer Probe Station

by Cheng Yang, Yin Wang and Wei Fan

Micromachines 2022, 13(3), 412; https://doi.org/10.3390/mi13030412 - 05 Mar 2022

Cited by 9 | Viewed by 2130

Abstract

In order to develop a high-resolution piezoelectric walking actuator with a long stroke for the wafer probe station, this work presents a design of a piezoelectric walking actuator with two auxiliary clamping feet elastically attached to major clamping feet. Its construction was introduced [...] Read more.

In order to develop a high-resolution piezoelectric walking actuator with a long stroke for the wafer probe station, this work presents a design of a piezoelectric walking actuator with two auxiliary clamping feet elastically attached to major clamping feet. Its construction was introduced and its operating principle was analyzed. Structure design details were discussed and a prototype was proposed. The prototype was fabricated and tested. The experimental results show that the proposed actuator can operate stably along a 20 mm guider. The proposed design is suitable for precision motion control applications. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

17 pages, 9927 KiB

Open AccessArticle

A Novel Remote-Controlled Vascular Interventional Robotic System Based on Hollow Ultrasonic Motor

by Qing Lu, Zhijun Sun, Jialiang Zhang, Jiacheng Zhang, Juju Zheng and Feng Qian

Micromachines 2022, 13(3), 410; https://doi.org/10.3390/mi13030410 - 04 Mar 2022

Cited by 5 | Viewed by 2717

Abstract

Cardiovascular diseases (CVDs) are the deadliest diseases worldwide. Master-slave robotic systems have been widely used in vascular interventional surgery with the benefit of high safety, efficient operation, and procedural facilitation. This paper introduces a remote-controlled vascular interventional robot (RVIR) that aims to enable [...] Read more.

Cardiovascular diseases (CVDs) are the deadliest diseases worldwide. Master-slave robotic systems have been widely used in vascular interventional surgery with the benefit of high safety, efficient operation, and procedural facilitation. This paper introduces a remote-controlled vascular interventional robot (RVIR) that aims to enable surgeons to perform complex vascular interventions reliably and accurately under a magnetic resonance imaging (MRI) environment. The slave robot includes a guidewire manipulator (GM) and catheter manipulator (CM) that are mainly composed of a hollow driving mechanism and a linear motion platform. The hollow driving mechanism is based on a traveling wave-type hollow ultrasonic motor (HUM) which has high positional precision, fast response, and magnetic interference resistance and realizes the cooperation of the guidewire and catheter by omitting the redundant transmission mechanism and maintaining good coaxiality. The HUM stator, the core part of the RVIR, is optimized by an adaptive genetic algorithm for better quality and greater amplitude of traveling waves, which are beneficial to the drive efficiency and precision. The robot system features great cooperating performance, small hysteresis, and high kinematic accuracy and has been experimentally verified for its capability to precisely manipulate the guidewire and catheter. Full article

(This article belongs to the Special Issue Recent Advance in Piezoelectric Actuators and Motors)

► Show Figures

Figure 1

Journal Menu

Journal Browser

Recent Advance in Piezoelectric Actuators and Motors

Share This Special Issue

Special Issue Editors

Special Issue Information

Keywords

Related Special Issue

Published Papers (16 papers)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI