This paper presents a novel impact rotary motor based on piezoelectric tube actuator with helical interdigitated electrodes which has compact structure and high resolution. The assembled prototype maximum diameter of 15 mm length 65 works under saw-shaped driving voltage. LuGre friction model is adopted to analyze the motion process in dynamic simulations. From experimental tests, first torsional resonant frequency 59.289 kHz free boundary condition. A series experiments about stepping...

A novel impact two-degree-of-freedom (2-DOF) motor based on the decomposed screw-type motion of a piezoelectric actuator (PA) has been proposed. The fabricated prototype maximum diameter 15 mm and length 100 which can produce torsional angle about 1000 μrad longitudinal displacement 1.03 μm under saw-shaped driving voltage with 720 Vp-p (peak-to-peak voltage). When axial prepressure generated by spring is 1N radial snap ring 14 N, realizes rotary frequency from 200 Hz to 4 kHz. 11.7 N 21.1...

A compact linear-rotary impact motor based on a single piezoelectric tube actuator is proposed. The can realize independent linear and rotary motions. With two electrodes, the has an outer diameter of 6 mm, thickness 0.5 length 25 mm. produces maximum axial displacement 2.17 µm with driving voltage 720 Vp-p (peak-to-peak voltage), it torsional angle 599.98 µrad Vp-p. prototype achieve velocities 6263.45 µm/s −6331.58 in positive negative directions motions under saw-shaped 560 at 8 kHz. 1.22...

A two-degrees-of-freedom (2-DOF) linear piezoelectric impact drive mechanism (PIDM) is actuated by two independent actuators (PAs). The coupled motion interactions of a orthogonal DOF PIDM with single friction interface are introduced and analyzed. complete dynamic model the 2-DOF established Karnopp considering distribution in x-axis y-axis. output displacements corresponding 1-DOF PIDMs investigated numerically. When input exciting signals have same driving voltage 100 V duty ratio 98% at...

This paper presents a novel impact piezoelectric linear-rotary motor which is driven by single piezoceramic tube with two parts of electrodes. From the inner and outer electrodes, longitudinal displacement generated used to actuate shaft linear motion ability. grooved helical interdigitated torsional rotary Working principle structural design are introduced quasi-static displacements estimated. With established kinematics model motor, working behaviors investigated numerically...

Alkaline battery defect detection is crucial for ensuring product quality and providing diagnostic feedback. Recently, high-performance deep learning algorithms have been introduced to recognise defects in alkaline batteries. However, the majority of learning-based methods overlook significant data imbalance issues electrode images, potentially resulting performance degradation. Therefore, a voting-based recognition algorithm containing three parts proposed this study. Firstly, resampling...

Abstract Piezoelectric ultrasonic transducers with the function of energy conversation, as well their numerous advantages in high-power density, quick response, flexible design, and service reliability, are involved wide applications industrial processing, precision driving, smart sensing, medical services. The electromechanical equivalent circuit Kirchhoff’s law indicate that mechatronics parameters essential for performance evaluation, reliability analysis, fault diagnosis transducers....

With rapid developments of micro/nano science and technology, precision platforms are widely required in the research industry fields. This paper presents a 2-DOF parallel linear platform utilizing piezoelectric impact drive mechanism. symmetrical flexible structure specific driving manner, effective decoupled actuation stator is achieved. FEA simulations conducted to investigate characteristics stator. established dynamic model platform, motion responses slider two directions simulated...

A compact impact two-degree-of-freedom linear-rotary piezoelectric motor is proposed using a single actuator. The actuator has pair of deformation counteracting helical interdigitated electrodes on its outside surface, which can be divided into two parts. When the parts are driving under same voltage signals, realize independent linear motion. signals with opposite duty cycles, rotary fabricated produce maximum average velocity 1.9 and -2.3 mm/s saw-shaped signal 400 Vp-p (peak-to-peak...

This paper presents the dynamic characteristics of piezoelectric inertia friction motors with Coulomb and Karnopp models. Working principles kinematics models drive mechanism are introduced. From numerical simulations, motion responses two types obtained. It is shown that static frictional force plays an important role in stick-slip working condition for mechanism, which means model would be more acceptable. For results almost same slip-slip conditions.

Circular piezoelectric elements with torsional vibration abilities are widely utilized as electromechanical transducers in various ultrasonic devices. In this paper, in-plane of a piezoceramic ring spiral interdigitated electrodes is studied theoretically and numerically. Design the working principle described. Mechanical electrical models derived corresponding equivalent circuit presented. Resonant frequencies different boundary conditions calculated. Trends resonant function ratio...

Background: Hepatoblastoma (HB) combined with secondary thrombocytosis is a common clinical condition. There still no consensus on the need for antiplatelet therapy in patients both HB and thrombocytosis. Methods: We conducted retrospective study of 229 children who visited were followed up at three hospitals from July 2013 to 2019. Kaplan-Meier analysis was used calculate overall survival (OS), log-rank test compare rate between groups, multivariate Cox proportional hazards model...