Computer Simulation and Modelling of 3D Travelling Wave Ultrasonic Motor Using a Flexural Vibration Ring Transducer

2013 ◽  
Vol 307 ◽  
pp. 31-41
Author(s):  
M. Shafik ◽  
B. Nyathi ◽  
S. Fekkai
Keyword(s):  
Flexural Vibration ◽  
Experimental Tests ◽  
Maximum Load ◽  
Travelling Wave ◽  
Ultrasonic Motor ◽  
Housing Unit ◽  
Bending Vibration ◽  
Element Analysis ◽  
Thermoplastic Material ◽  
Piezoelectric Ultrasonic Motor

This paper presents a 3D piezoelectric ultrasonic motor using a single Flexural Vibration Ring Transducer. The motor consists of three main parts, the rotor, the stator and the housing unit. The stator is a piezoelectric transducer ring made from PZT S42 material. Three steel rods and a magnet were designed to support the rotor. The rotor is a sphere of metal that rests on the stator intersecting at the tips of the steel rods and the magnet. The housing unit is made of Perspex, a transparent thermoplastic material. Longitudinal and bending vibration modes, of oscillating structures are superimposed in the motor, generating elliptical micro motions at the driving tips. Pressing the rotor against the stator tips the micro motions are converted into a 3D rotational motion, via the friction between the tips of the three rods and the rotor. The motor structures, working principles, design and finite element analysis are discussed in this paper. A prototype of the motor was fabricated and its characteristics measured. Experimental tests show typical speed of movement equal to 35 revolutions per minute, a resolution of less than 5μm and maximum load of 3.5 Newton.

A Standing Wave Piezoelectric Ultrasonic Motor Using a Single Flexural Vibration Ring Transducer

2013 ◽  
Vol 415 ◽  
pp. 126-131
Author(s):  
M. Shafik ◽  
L. Makombe
Keyword(s):  
Standing Wave ◽  
Flexural Vibration ◽  
Experimental Tests ◽  
Maximum Load ◽  
Ultrasonic Motor ◽  
Housing Unit ◽  
Element Analysis ◽  
Design Structure ◽  
Piezoelectric Ultrasonic Motor ◽  
Working Parameters

This paper presents a rotary standing wave ultrasonic motor using single flexural vibration ring transducer. The motor consists of three main components, the stator, rotor and housing unit. The stator is a piezoelectric transducer ring. The rotor is designed of a compact driving wheel and shaft. The housing unit is made of a transparent thermoplastic Perspex material and is part of the motor working mechanism. The motor design, structure, working principles and modelling using finite element analysis is discussed and presented in this paper. A prototype of the motor was fabricated and its characteristics measured. Experimental tests showed that the motor electrical working parameters are: Current: 100 m-amps, Voltage: 100 volts, Frequency: 41.7 kHz, typical speed of 32 revolutions per minute, a resolution of less than 50μm and maximum load of 1.5 Newton.

Miniaturization of the Quasi-Traveling Wave Ultrasonic Linear Motor Using a Ring Type Rectangular Vibrator

2012 ◽  
Vol 548 ◽  
pp. 865-869 ◽  
Author(s):  
Shun Xin Zhang ◽  
Chao Dong Li
Keyword(s):  
Traveling Wave ◽  
Excitation Frequency ◽  
Flexural Vibration ◽  
Maximum Load ◽  
Linear Motor ◽  
Vibration Modes ◽  
Element Analysis ◽  
Ring Type ◽  
Wave Drive ◽  
Spatial Phase Shift

Ultrasonic linear motor, Piezoelectricity, Rectangular vibrator, Traveling wave Abstract. With the aim of realizing quasi-traveling wave drive in ultrasonic linear micro motors, a novel quasi-traveling wave ultrasonic linear motor using a ring type rectangular vibrator with the sizes of 39mm×6mm×12.7mm is proposed. The quasi-traveling wave is excited and propagates along the ring type rectangular vibrator depending on the superposition of two orthogonal flexural-vibration modes with a spatial phase shift of 90 degrees. 7 piezoelectric ceramic elements are used to excite two working modes of the vibrator. The vibrator structure was designed and eigenfrequency degeneration was realized by Finite Element Analysis (FEA) method. The modal test shows that the design scheme was tenable. The excitation and propagation of quasi-traveling wave were proved by laser vibration test. The trial motor gave a maximum driving velocity of 162.5mm/s and a maximum load of 8.5N, while the excitation frequency was 66 KHz and voltage was 160Vpp.

Computer Simulation and Modelling of Standing Wave Piezoelectric Ultrasonic Motor Using a Single Flexural Vibration Ring Transducer

2013 ◽  
Author(s):  
M. Shafik ◽  
L. Makombe ◽  
B. Mills
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Standing Wave ◽  
Travelling Waves ◽  
Ultrasonic Motor ◽  
Housing Unit ◽  
Algebraic Solution ◽  
Element Analysis ◽  
Simulation And Modelling ◽  
Motor Design

A rotary standing wave ultrasonic motor using single flexural ring transducer is developed and presented in this paper. The motor consists of three main components, the stator, rotor and housing unit. The stator is a piezoelectric transducer ring. The rotor is designed of a compact driving wheel and the shaft. The housing unit is made of a transparent thermoplastic Perspex material and is part of the motor working mechanism. The motor design, structure, working principles and modelling using finite element analysis is discussed and presented in this paper. The simulation and modelling using finite element analysis for the motor is used in the motor design development process. Finite element has been used to examine the motor structure by performing an algebraic solution of a set of equations, describing an ideal model structure, with a finite number of variables. The established simulation and modelling for ultrasonic motor using finite element analysis enabled to select the material of the flexural transducer ring, investigate the material deformation, defining the operating parameters for the motor and establish the principles of motion. The motor working principles is based on creating travelling waves vibration modes, of oscillating structures that are superimposed in the stator, generating elliptical micro motions at the stator tips. Pressing the rotor against the stator tips, using an elastic spring, the micro motions are converted into a rotary motion via the friction between the tips of the stator and the rotor. A prototype of the motor was fabricated and its characteristics measured. Experimental tests showed that the electrical working parameters are: Current: 100 m-amp’s, Voltage: 100 volts, Frequency: 41.7kHz, typical speed of movement: 32 revolutions per minute, a resolution of less than 50μm and maximum load of 1.5 Newton.

Computer Simulation and Modelling of Standing Wave Piezoelectric Ultrasonic Motor Using a Single Flexural Transducer

2012 ◽  
Author(s):  
M. Shafik
Keyword(s):  
Finite Element Analysis ◽  
Computer Simulation ◽  
Finite Element ◽  
Standing Wave ◽  
Flexural Vibration ◽  
Ultrasonic Motor ◽  
Algebraic Solution ◽  
Operating Parameters ◽  
Element Analysis ◽  
Simulation And Modelling

This paper presents a standing wave piezoelectric ultrasonic using a flexural vibration transducer. The motor consists of three main parts, stator, rotor and sliding element. The stator is a single piezoceramic flexural vibration bar. The rotor is made up of the motor driving wheel and the shaft. A computer simulation and modelling using finite element analysis for the proposed motor is discussed and used in the motor design development process. Finite element analysis has been used to evaluate the motor structure by performing an algebraic solution of a set of equations, describing an ideal model structure, with a finite number of variables. The established simulation and modelling for ultrasonic motor using finite element analysis enabled to select, the material of the flexural transducer, defining the operating parameters for the motor, determining the principles of motion and proposing an innovative technique to control the direction of motion, by controlling the phase between the two modes of vibrations. This enabled to create two directions of motion from a single vibration bar. A prototype of the proposed motor was fabricated and measured. This showed that operating parameters of the fabricated prototype are: frequency equal to 40.7 KHz, voltage: 50: 100 volt and current: 50: 100 m-amperes. This is showed a close agreement with FEA. Typical output of the prototype is no-load travelling speed of 28 mm/s, a resolution on the order of micrometers and a dynamic response <100 μsec. The motor is able to carry a load equal to 0.78 Newton. The developed motor has been used successfully in EDM industrial applications.

Computer Simulation and Modelling of Standing Wave Ultrasonic Motor Using a Single Flexural Vibration Transducer

2013 ◽  
Vol 307 ◽  
pp. 42-52
Author(s):  
M. Shafik ◽  
Tim Wilmshurst ◽  
S. Fekkai
Keyword(s):  
Finite Element Analysis ◽  
Computer Simulation ◽  
Finite Element ◽  
Standing Wave ◽  
Flexural Vibration ◽  
Ultrasonic Motor ◽  
Operating Parameters ◽  
Element Analysis ◽  
Vibration Transducer ◽  
Simulation And Modelling

This paper presents a standing wave rotary piezoelectric ultrasonic using a single flexural vibration transducer. The motor consists of three main parts, stator, rotor and housing unit. The stator is a single piezoceramic flexural vibration transducer. The rotor is made up of the motor driving wheel and the shaft. A computer simulation and modelling using finite element analysis for the proposed motor is discussed and used in the motor design development process. Finite element analysis has been used to evaluate the motor structure by performing an algebraic solution of a set of equations, describing an ideal model structure, with a finite number of variables. The established simulation and modelling for ultrasonic motor using finite element analysis enabled to select, the material of the flexural transducer, defining the operating parameters for the motor, determining the principles of motion and proposing an innovative technique to control the direction of motion, by controlling the phase between the two modes of vibrations. This enabled to create two directions of motion from a single vibration bar. A prototype of the proposed motor was fabricated and its characteristics measured. This showed that operating parameters of the fabricated prototype are: frequency equal to 40.7 KHz, voltage: 50: 100 volt and current: 50: 100 m-amperes. This is showed a close agreement with FEA. Typical output of the prototype is no-load speed of 120 rpm, a resolution on the order of micrometers and a dynamic response <100 µsec. The motor is able to carry a load equal to 2.8 Newton.

scholarly journals A New Approach of Soft Joint Based on a Cable-Driven Parallel Mechanism for Robotic Applications

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1468
Author(s):  
Luis Nagua ◽  
Carlos Relaño ◽  
Concepción A. Monje ◽  
Carlos Balaguer
Keyword(s):  
Parallel Mechanism ◽  
Degrees Of Freedom ◽  
Kinematic Model ◽  
Experimental Tests ◽  
Humanoid Robots ◽  
Inverse Kinematic ◽  
Element Analysis ◽  
New Approach ◽  
Flexible Polymer ◽  
The Mathematical Model

A soft joint has been designed and modeled to perform as a robotic joint with 2 Degrees of Freedom (DOF) (inclination and orientation). The joint actuation is based on a Cable-Driven Parallel Mechanism (CDPM). To study its performance in more detail, a test platform has been developed using components that can be manufactured in a 3D printer using a flexible polymer. The mathematical model of the kinematics of the soft joint is developed, which includes a blocking mechanism and the morphology workspace. The model is validated using Finite Element Analysis (FEA) (CAD software). Experimental tests are performed to validate the inverse kinematic model and to show the potential use of the prototype in robotic platforms such as manipulators and humanoid robots.

scholarly journals Design and Performance Evaluation of a Single-Phase Driven Ultrasonic Motor Using Bending-Bending Vibrations

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 853
Author(s):  
Dongmei Xu ◽  
Wenzhong Yang ◽  
Xuhui Zhang ◽  
Simiao Yu
Keyword(s):  
Single Phase ◽  
Oblique Line ◽  
Ultrasonic Motor ◽  
Vibration Modes ◽  
Bending Vibrations ◽  
Bending Vibration ◽  
Output Performance ◽  
Resonance Frequencies ◽  
And Performance ◽  
Line Trajectory

An ultrasonic motor as a kind of smart material drive actuator has potential in robots, aerocraft, medical operations, etc. The size of the ultrasonic motor and complex circuit limits the further application of ultrasonic motors. In this paper, a single-phase driven ultrasonic motor using Bending-Bending vibrations is proposed, which has advantages in structure miniaturization and circuit simplification. Hybrid bending vibration modes were used, which were excited by only single-phase voltage. The working principle based on an oblique line trajectory is illustrated. The working bending vibration modes and resonance frequencies of the bending vibration modes were calculated by the finite element method to verify the feasibility of the proposed ultrasonic motor. Additionally, the output performance was evaluated by experiment. This paper provides a single-phase driven ultrasonic motor using Bending-Bending vibrations, which has advantages in structure miniaturization and circuit simplification.

On-Site Experimental Testing to Study the Vibration of Composite Floors

2014 ◽  
Vol 601 ◽  
pp. 231-234
Author(s):  
Cristian Lucian Ghindea ◽  
Dan Cretu ◽  
Monica Popescu ◽  
Radu Cruciat ◽  
Elena Tulei
Keyword(s):  
Dynamic Characteristics ◽  
Experimental Testing ◽  
Concrete Slab ◽  
Human Perception ◽  
Experimental Tests ◽  
International Standards ◽  
Structural Element ◽  
Element Analysis ◽  
Floor Slabs ◽  
Composite Floors

As a general trend, in order to reduce material consumption or to reduce the mass of the structures, composite floor slabs solutions are used to achieve large spans floor slabs. This solutions led to floors sensitive to vibrations induced generally by human activities. As a verification of the design concepts of the composite floors, usually, it is recommended a further examination of the floor after completion by experimental tests. Although the experimental values of the dynamic response of the floor are uniquely determined, the processing can take two directions of evaluation. The first direction consist in determining the dynamic characteristics of the floor and their comparison with the design values. Another way that can be followed in the processing of the experimental results is to consider the human perception and comfort to the vibration on floors. The paper aims to present a case study on a composite floor, with steel beams and concrete slab, tested on-site. Both aspects of data processing are analyzed, in terms of the structural element, and in terms of the effect on human perception and comfort. Experimentally obtained values for the dynamic characteristics of the floor are compared with numerical values from finite element analysis, while the second type of characteristic values are compared with various human comfort threshold values found in international standards.

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