Experimental investigation on sandwich structure ring-type ultrasonic motor

Peng, Taijiang; Shi, Huaizhong; Liang, Xiong; Luo, Feng; Wu, Xiaoyu

doi:10.1016/j.ultras.2014.08.014

Cited by 27 publications

(5 citation statements)

References 12 publications

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“…Based on H-TRUMs, researchers presented a new way to understand the mechanical characteristics of an ultrasonic motor using finite element (FE) analysis in the 1990s (Krome and Wallaschek, 1996; Maeno et al, 1992), which aroused people’s research enthusiasm. Thereafter, with the lightweight structures getting more and more attention, a large number of H-TRUMs (Duan et al, 2009; Liu et al, 2019; Peng et al, 2015; Qu et al, 2006) have been proposed, which have achieved successful applications. However, on account of the limitation of traditional preloading method (preload is produced by the deformation of rotor and stator; Ueha et al, 1993), their working life will be reduced sharply due to the abrasion of friction material (Ishii et al, 1995, 1998; Wallaschek, 1998).…”

Section: Introductionmentioning

confidence: 99%

Mechanical optimization of a novel hollow traveling wave rotary ultrasonic motor

Ren

Yang²,

Chen

et al. 2020

Journal of Intelligent Material Systems and Structures

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A novel hollow type of traveling wave rotary ultrasonic motor is proposed, optimized, fabricated, and tested in this study. Unlike conventional ultrasonic motors, this novel ultrasonic motor adopts a bran-new preloading method that preload is applied from the bottom of the stator through a wave spring, which can not only enhance the anti-overload ability but also extend the working life of the motor. According to this motor, a three-dimensional finite element model has been built by the commercial finite element software ADINA. In terms of the friction material and the preload, a detailed further optimization procedure is given after the initial design. Finally, the appropriate size and location of the friction layer and a proper preload for this motor have been determined. Almost all of the motor’s mechanical capacities, such as rotational speed, torque, and deformation, can be obtained by simulations in ADINA, which have good agreement with experimental results.

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Section: Introductionmentioning

confidence: 99%

Mechanical optimization of a novel hollow traveling wave rotary ultrasonic motor

Ren

Yang²,

Chen

et al. 2020

Journal of Intelligent Material Systems and Structures

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“…In this application, since it consists in actuation there are no output electrodes and the electrodes only serve the generation of the wave. Several topologies to generate the traveling wave have been proposed [13,14]. In [15], by changing the connection of electrodes, the frequency and thus the speed of the wave can be modified.…”

Section: Introductionmentioning

confidence: 99%

A transverse traveling wave piezoelectric transformer

Martinez¹,

Pillonnet²,

Loyau³

et al. 2019

Smart Mater. Struct.

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Piezoelectric transformers can be a promising candidate in isolated power converters to replace magnetic ones as they present high quality factor, high voltage gain and low electromagnetic compatibility issues. Herein a new topology of traveling wave piezoelectric transformer (TWPT) is proposed. Unlike conventional piezoelectric transformers, the proposed transformer uses progressive waves to carry out the electromechanical conversion. The main asset of the structure is the obtaining of a polyphase system of voltage at the output. Thus, associated with an appropriate converter circuit topology, it enables any kind of AC-DC or AC-AC power conversion. The proposed piezoelectric transformer consists in a multi-electrode ring architecture and uses transverse wave, i.e. the deformation is orthogonal to the propagation direction, to perform the electro-mechanical coupling. Furthermore an analytical modelling is exposed to describe the electro-mechanical behaviour of the transformer. The technique allows to obtain an admittance matrix that completely characterizes the coupling between all the electrodes and that can be used to simulate the transformer in electronic circuit software. With this model it is possible to predict numerically the voltages, currents, displacements and stresses in the piezoelectric transformer over time as a function of the geometrical and physical parameters of the materials in early design stage and it allows a co-design between the piezoelectric transformer and its power electronics circuitry. Finally, a prototype of the TWPT with four phase output voltage is presented to experimentally validate this new concept.

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“…But the rotor is driven by the frictional forces between the friction material and metal elastomer particles whose trajectory is ellipse. 3,4 It seems hard to effectively extract the fault information due to the effects of other mechanical system noises. Consequently, an effective signal processing method is required.…”

Section: Introductionmentioning

confidence: 99%

Fault Feature Extraction and Degradation State Identification for Piezoelectric Ceramics Cracking in Ultrasonic Motor Based on Multi-Scale Morphological Gradient

An¹,

Li²,

Chen³

2019

The International Journal of Acoustics and Vibration

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Piezoelectric ceramics cracking is one of the main faults of the ultrasonic motor. According to the morphological mathematics and information entropy, a method based on multi-scale morphological gradient was proposed for ceramics fault feature extraction and degradation state identification. To solve the problem that traditional multi-scale morphology spectral (MMS) entropy cannot exactly describe the performance degradation of the piezoelectric ceramics, multi-scale morphology gradient difference (MMGD) entropy was proposed to improve the sensitivity to the fault. Furthermore, multi-scale morphology gradient singular (MMGS) entropy was presented to reduce the system noise interference to the useful fault information. The disturbance analysis of temperature, load, and noise for MMGD entropy and MMGS entropy was also given in this paper. Combining the advantages of the above two entropies, a standard degradation mode matrix was built to distinguish the degradation state via the grey correlation analysis. The analysis of actual test samples demonstrated that this method is feasible and effective to extract the fault feature and indicate the degradation of piezoelectric cracking in ultrasonic motor.

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Experimental investigation on sandwich structure ring-type ultrasonic motor

Cited by 27 publications

References 12 publications

Mechanical optimization of a novel hollow traveling wave rotary ultrasonic motor

Mechanical optimization of a novel hollow traveling wave rotary ultrasonic motor

A transverse traveling wave piezoelectric transformer

Fault Feature Extraction and Degradation State Identification for Piezoelectric Ceramics Cracking in Ultrasonic Motor Based on Multi-Scale Morphological Gradient

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