Ultrasonic linear motor using the L-B mode Langevin transducer with an exponential horn

Shi, Shengjun; Chen, Weishan; Liu, Junkao; Xue-tao, Zhao

doi:10.1007/s11465-008-0026-1

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…These motors transmit power via frictional force at the contact area between the stator and rotor, which originates from the traveling wave generated along the circumferential direction of the stator [8]. Advantageous features such as high stalling torque [9,10], fast response [11], magnetic resonance compatibility [12,13], and high precision motion without magnetization are the motor's strengths because microscopic stepping motion can be achieved by controlling the actuating voltages. Therefore, the ultrasonic motor is widely used in precise manufacturing, robots, and telescope zoom lens [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Analysis and control of micro-stepping characteristics of ultrasonic motor

et al. 2020

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Micro-stepping motion of ultrasonic motors satisfies biomedical applications, such as cell operation and nuclear magnetic resonance, which require a precise compact-structure non-magnetization positioning device. When the pulse number is relatively small, the stopping characteristics have a non-negligible effect on the entire stepwise process. However, few studies have been conducted to show the rule of the open-loop stepwise motion, especially the shutdown stage. In this study, the modal differences of the shutdown stage are found connected with amplitude and velocity at the turn-off instant. Changes of the length in the contact area and driving zone as well as the input currents, vibration states, output torque, and axial pressure are derived by a simulation model to further explore the rules. The speed curves and vibration results in functions of different pulse numbers are compared, and the stepwise motion can be described by a two-stage two-order transfer function. A test workbench based on the Field Programmable Gate Array is built for acquiring the speed, currents, and feedback voltages of the startup-shutdown stage accurately with the help of its excellent synchronization performances. Therefore, stator vibration, rotor velocity, and terminal displacements under different pulse numbers can be compared. Moreover, the two-stage two-order model is identified on the stepwise speed curves, and the fitness over 85% between the simulation and test verifies the model availability. Finally, with the optimization of the pulse number, the motor achieves 3.3 µrad in clockwise and counterclockwise direction.

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Section: Introductionmentioning

confidence: 99%

Analysis and control of micro-stepping characteristics of ultrasonic motor

et al. 2020

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“…The input impedance characteristic of the motor was measured using impedance analyzer (4294A, Agilent Inc) at 0.5 Vrms. To compare the difference between the previous LUSM by author [7] and the proposed one, their impedance curve were plotted in Fig. 6(a) and (b) in which solid and dotted line illustrate the bending and longitudinal impedance versus exciting signal frequency.…”

Section: Methodsmentioning

confidence: 99%

A Novel L-B Hybrid Langevin Transducer Type Linear Ultrasonic Motor With Modal Coupling Reducing Configuration

et al. 2010

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For most longitudinal and bending hybrid linear ultrasonic motor, there exists an inherent coupling effect between two modals due to the structure defect, which shows the phenomenon of one phase piezoceramic exciting the other phase vibration or vice versa. A new modal decoupling motor was proposed with the longitudinal piezoceramics positioned in the middle part of Langevin transducer and the bending piezoceramics at longitudinal antinodal plane. The prototype, designed with frequency tuning method, showed obvious modal coupling reduction in impedance characteristics and laser vibrometer measurement, and also surpass previous motor in output performance.

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“…But only a few of them operate in a non-longitudinal vibration mode. There are reports about multimode oscillations of a Langevin-type transducer (Shi, Chen, and Liu 2006;Shi, Chen, and Liu 2008;Asumi et al 2009;Chena and Shia 2007). A multimode transducer requires simultaneous excitation of two vibration modes such as, for example, the first longitudinal and second bending modes Liu 2006, 2008).…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Actuator Based on Two Bending-Type Langevin Transducers

Mažeika

Vasiljev

Borodinas

et al. 2015

Energy Harvesting and Systems

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Langevin-type piezoelectric transducers are widely used for different industrial applications such as high-accuracy positioning, ultrasonic welding, bonding, drilling, etc. Usually Langevin-type transducers operate at longitudinal mode by employing d 33 vibrations of piezoceramic elements. A novel design of piezoelectric actuator based on two bending-type Langevin transducers is introduced. Two half-wavelength transducers are connected by a special aluminum plate. Piezoceramic rings with two-directional polarizations are used for bending oscillation excitation. An input voltage with phase shifted by π/2 on different transducers is applied. The forward and backward elliptical motion of the contact tip is controlled by changing phases of electric signals on different transducers. A numerical simulation was carried out to investigate the trajectories of contact point motion and to validate the operating principle of the actuator. Experimental prototype of the piezoelectric actuator was fabricated, and the measurements of driven tip movements and mechanical output were performed. The results of numerical and experimental analysis are discussed.

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Ultrasonic linear motor using the L-B mode Langevin transducer with an exponential horn

Cited by 4 publications

References 7 publications

Analysis and control of micro-stepping characteristics of ultrasonic motor

Analysis and control of micro-stepping characteristics of ultrasonic motor

A Novel L-B Hybrid Langevin Transducer Type Linear Ultrasonic Motor With Modal Coupling Reducing Configuration

Piezoelectric Actuator Based on Two Bending-Type Langevin Transducers

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