Wireguide driving actuator using resonant-type smooth impact drive mechanism

Yokozawa, Hiroki; Morita, Takeshi

doi:10.1016/j.sna.2015.04.012

Cited by 27 publications

(17 citation statements)

References 9 publications

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“…It is likely that this was done with direct contact between slider and measurement instrument.) Another option is to make the motor lift weights [83][84][85]. The force generation potential can also be estimated from the transient motor behaviour [86].…”

Section: Force Generationmentioning

confidence: 99%

“…linear sawtooth without plateau [78,249] linear sawtooth with two plateaus [24,26,117,250] square, pulse [78,138,200,[251][252][253][254][255] two superposed sines [68,77,85,86,94,171] (b) Matsuda and Kaneko [45] present a motor operating with single cosine waves. This demonstrates that an inertia motor in single-step operation does not necessarily require an asymmetric driving signal, but this signal remains unique in literature.…”

Section: Voltage Signals For Low-frequency Operationmentioning

confidence: 99%

“…It was independently used as the basis of a specialised simulation technique for such motors by Hunstig et al ([87] (pp. [85][86][87][88][89][90][91][92][93]; [264]). …”

Section: High-frequency Operationmentioning

confidence: 99%

See 2 more Smart Citations

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

Hunstig

2017

Actuators

109

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Piezoelectric inertia motors-also known as stick-slip motors or (smooth) impact drives-use the inertia of a body to drive it in small steps by means of an uninterrupted friction contact. In addition to the typical advantages of piezoelectric motors, they are especially suited for miniaturisation due to their simple structure and inherent fine-positioning capability. Originally developed for positioning in microscopy in the 1980s, they have nowadays also found application in mass-produced consumer goods. Recent research results are likely to enable more applications of piezoelectric inertia motors in the future. This contribution gives a critical overview of their historical development, functional principles, and related terminology. The most relevant aspects regarding their design-i.e., friction contact, solid state actuator, and electrical excitation-are discussed, including aspects of control and simulation. The article closes with an outlook on possible future developments and research perspectives.

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Section: Force Generationmentioning

confidence: 99%

Section: Voltage Signals For Low-frequency Operationmentioning

confidence: 99%

See 1 more Smart Citation

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

Hunstig

2017

Actuators

109

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“…For conventional HIFU transducers that focus ultrasound from the outside, the focusing performance strongly relies on the working medium, however, our waveguide can directly orient the thin waveguide tip to the lesion for treatments and the output performances can be conveniently controlled by the waveguide design. Due to the direct contact between the solid waveguide and tissue, additional large mechanical vibration for direct contact tissue damage 29–31 can be achieved besides the heating effects. So, by combining these effects, the tissue destruction efficiency can be improved.…”

Section: Introductionmentioning

confidence: 99%

Double-parabolic-reflectors acoustic waveguides for high-power medical ultrasound

Chen

Irie²,

Iijima

et al. 2019

Sci Rep

Self Cite

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High intensity focused ultrasound therapeutics are widely used to noninvasively treat various types of primary tumors and metastasis. However, ultrasound penetration depth is shallowed with increasing frequency which limits the therapeutic accuracy for deep tissues. Although acoustic waveguides are commonly inserted into tissue for localized therapy, powerful ultrasound delivery is difficult. Here, we invent double-parabolic-reflectors acoustic waveguides, where high-power ultrasound emission and large mechanical vibration enhance the therapeutic efficiency. High-energy-density ultrasound with around 20 times amplification by two parabolic reflectors propagates through the thin waveguide between 1 to 2 MHz, and wideband large mechanical vibration at the waveguide tip from 1 kHz to 2.5 MHz accelerates the therapeutics. This fundamental work serves as a milestone for future biomedical applications, from therapeutics to diagnostics. Since the high-power ability at high frequencies, our waveguide will also open up new research fields in medical, bio, physics and so on.

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“…Further, the special requirement on the input voltage (i.e. with one direction of the stroke fast and the opposite direction of the stroke slow) can be realized by the resonant principle (Yokozawa and Morita, 2015).…”

Section: Introductionmentioning

confidence: 99%

A computationally efficient model to capture the inertia of the piezoelectric stack in impact drive mechanism in the case of the in-pipe inspection application

Liu

Xiong

et al. 2016

Mech. Sci.

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Abstract. This paper presents a new model for the piezoelectric actuator (PA) in the context of in the impact drive mechanism (IDM) for the in-pipe inspection application. The feature of the model is capturing the inertia of PA stack in a distributed manner as opposed to the lumped manner in literature. The benefit arising from this feature is a balanced trade-off between computational efficiency and model accuracy. The study presented in this paper included both theoretical development (i.e. the model of the piezoelectric actuator and the model of the entire IDM which includes the actuator) and experimental verification of the model. The study has shown that (1) the inertia of the PA in such a robot will significantly affect the accuracy of the entire model of IDM and (2) the simulation of the dynamic behavior with the proposed model is sufficiently accurate by comparing with the experiment. It is thus recommended that the inertia of the PA be considered in the entire model of the IDM robot. The model is an analytical type, which has a high potential to be used for the model-based control of the IDM robot and optimization of its design for a much improved performance of the IDM system.

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Wireguide driving actuator using resonant-type smooth impact drive mechanism

Cited by 27 publications

References 9 publications

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

Double-parabolic-reflectors acoustic waveguides for high-power medical ultrasound

A computationally efficient model to capture the inertia of the piezoelectric stack in impact drive mechanism in the case of the in-pipe inspection application

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