A Bidirectional Standing Wave Ultrasonic Linear Motor Based on Langevin Bending Transducer

Chen, Weishan; Shi, Shengjun

doi:10.1080/00150190701369958

Cited by 31 publications

(11 citation statements)

References 12 publications

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“…Furthermore, their compactness is often seen as an advantage when compared to electromagnetic motors [1][2][3]. Their other advantages include quick response time, free from magnetic influence, and ability to exert a holding force without external input.…”

Section: Introductionmentioning

confidence: 99%

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

Mills

Benhabib

2014

Ferroelectrics

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In this paper, a novel actuation approach is proposed for linear ultrasonic motors by applying a square-wave excitation voltage across the piezoceramic elements. Using this approach, the output force and power of the ultrasonic motor can be tangibly increased, without increasing its stator volume, thereby leading to improvement in the actuator power density. Added normal force is exerted on the moving stage by exciting the higher longitudinal resonant modes, the frequencies of which coincide with the harmonics of the square-wave voltage. The proposed approach is illustrated herein via the simulation of a suitably designed bimodal linear ultrasonic motor using finite-element analysis.

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Section: Introductionmentioning

confidence: 99%

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

Mills

Benhabib

2014

Ferroelectrics

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“…Hence, the flexibility of the design of this linear actuator is reduced. The singlemode actuation actuators are further classified into asymmetric electric actuation [20][21][22][23][24] and unequal frequency actuation [25][26][27][28]. The asymmetric electric actuation actuator is excited asymmetrically.…”

Section: Introductionmentioning

confidence: 99%

A novel plate type linear piezoelectric actuator using dual-frequency drive

Liu

Yao

Jian

et al. 2017

Smart Mater. Struct.

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In this paper, a novel rectangular structure linear piezoelectric actuator that utilizes two lower order decoupled vibration modes is developed and investigated. A noticeable trait of the linear piezoelectric actuator is that it can realize bi-directional motion by changing the vibration mode of the stator with different exciting frequencies. Modal and harmonic analysis of the stator are performed by the finite element method to determine the actuator structure and dimensions and stablished that the driving tip trajectories are diagonal lines. The direction of the actuator is controlled by the orientation of the diagonal motion generated at the driving tip. When the diagonal motion is inclined right as the driving tip approaches the linear guide, it will move the linear guide right. Correspondingly, the linear guide will move to the left, if the diagonal motion inclines left. In addition, a prototype linear piezoelectric actuator is fabricated and experimented. The results of the experiments indicate that the actuator has good mechanical output characteristics. Typical output of the prototype is no-load speed of 504 mm s−1 and maximum mechanical load of 6.5 kg.

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“…Bending-type vibrations of a Langevin transducer are excited using d 33 mode of the two directional polarized piezoceramic parts; thus, high power conversion efficiency of lead zirconate titanate (PZT) is achieved. However, two different bending modes of a stator require that a bidirectional motion of the slider be obtained (Chena and Shia 2007). Therefore the motor cannot have identical mechanical characteristics in both forward and backward directions.…”

Section: Introductionmentioning

confidence: 99%

“…A multimode transducer requires simultaneous excitation of two vibration modes such as, for example, the first longitudinal and second bending modes Liu 2006, 2008). An ultrasonic linear motor based on bending-type Langevin transducer has also been developed (Chena and Shia 2007). Bending-type vibrations of a Langevin transducer are excited using d 33 mode of the two directional polarized piezoceramic parts; thus, high power conversion efficiency of lead zirconate titanate (PZT) is achieved.…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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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A Bidirectional Standing Wave Ultrasonic Linear Motor Based on Langevin Bending Transducer

Cited by 31 publications

References 12 publications

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

Actuation of Linear Ultrasonic Motors with a Square-wave Based Excitation Voltage

A novel plate type linear piezoelectric actuator using dual-frequency drive

Piezoelectric Actuator Based on Two Bending-Type Langevin Transducers

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