A spiral motion piezoelectric micromotor for autofocus and auto zoom in a medical endoscope

Chen, Xi; Chen, Zhijiang; Li, Xiaotian; Liang, Shan; Sun, Wanchen; Wang, Xi-guang; Xie, Tianyu; Dong, Shuxiang

doi:10.1063/1.4941395

Cited by 26 publications

(19 citation statements)

References 17 publications

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“…This product has been widely used for applications ranging from medicine [124] to aerospace [125]. The idea of Slider PZTs using a nut and screw has been deployed in different linear micromotors (d = 3.6 mm and L = 3 mm) for medical applications [126].…”

Section: Review Of Linear Ultrasonic Micromotorsmentioning

confidence: 99%

Review: Recent Advances in Micromotors

Mashimo

Izuhara

2020

IEEE Access

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Micromotors are of great interest not only for the miniaturization of current products but also for the realization of future micromachines that can explore challenging environments. The speed of downsizing actuators is slower than that of semiconductor components, but developments over the last two decades have overcome several difficulties and enabled engineers to start designing applications. In this paper, we review the existing micromotors ranging from famous papers to state-of-the-art, in particular recent developments and their applications. We deal with three representative principles for rotary and linear micromotors: electromagnetics, electrostatics, and piezoelectricity. Another purpose of this paper is to suggest design criteria and physical limitations on these principles for engineers who design millimeter-scale automation devices. Incorporating micromotors can permit space saving and improve design flexibility in application designs, such as smartphones and medical devices.

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Section: Review Of Linear Ultrasonic Micromotorsmentioning

confidence: 99%

Review: Recent Advances in Micromotors

Mashimo

Izuhara

2020

IEEE Access

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“…Piezoelectric actuators are widely used in micromanipulation applications due to their rapid response and high repeatability, for example, microsurgical robots [ 1 , 2 ], autofocus optical systems [ 3 , 4 , 5 ], precise fabrication [ 6 , 7 , 8 ] and other applications [ 9 , 10 , 11 ]. One of the biggest challenges while using the piezoelectric actuators in dynamic applications is to model and compensate for the undesired complex hysteresis.…”

Section: Introductionmentioning

confidence: 99%

A Digitized Representation of the Modified Prandtl–Ishlinskii Hysteresis Model for Modeling and Compensating Piezoelectric Actuator Hysteresis

Zhou

Feng

Aye³

et al. 2021

Micromachines

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Piezoelectric actuators are widely used in micromanipulation and miniature robots due to their rapid response and high repeatability. The piezoelectric actuators often have undesired hysteresis. The Prandtl–Ishlinskii (PI) hysteresis model is one of the most popular models for modeling and compensating the hysteresis behaviour. This paper presents an alternative digitized representation of the modified Prandtl–Ishlinskii with the dead-zone operators (MPI) hysteresis model to describe the asymmetric hysteresis behavior of piezoelectric actuators. Using a binary number with n digits to represent the classical Prandtl–Ishlinskii hysteresis model with n elementary operators, the inverse model can be easily constructed. A similar representation of the dead-zone operators is also described. With the proposed digitized representation, the model is more intuitive and the inversion calculation is avoided. An experiment with a piezoelectric stacked linear actuator is conducted to validate the proposed digitized MPI hysteresis model and it is shown that it has almost the same performance as compared to the classical representation.

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“…The piezoelectric motor is a form of precision actuation systems and has been used in various applications, such as precision positioning stages (Bardin and Vasilev, 2017; Cai et al, 2018), medical instruments (Chen et al, 2016; Li et al, 2020), semiconductor chip manufacturing (Ito et al, 2019), and aerospace (Koh et al, 2010). It utilizes the inverse piezoelectric effect of piezoelectric materials to transform the electric energy into the mechanical output which can be applied directly to engineering applications (Hwang et al, 2019) or amplified through specific devices (Chen et al, 2015; Li and Yao, 2018; Wang et al, 2018a) to drive mover.…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of bonded-type piezoelectric linear motors considering the stress transfer in adhesive layer

Yao

Dai

et al. 2021

Journal of Intelligent Material Systems and Structures

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This paper provides a general framework for modeling bonded-type piezoelectric linear motors considering the stress transferred by adhesive layer. A three-dimensional static model of stator is first developed by the principle of minimum potential energy and finite element. The stress transferred by adhesive layer could be simulated and analyzed for arbitrary bonding conditions. Basing on the static stress-transfer analysis, a quasi-static stress acted to substrate by piezoelectric elements is assumed and integrated into the substrate dynamic model. A pure mechanical dynamic model is developed for the electromechanical coupling system of stator. Furthermore, the whole-machine dynamic model of motor is presented by incorporating the frictional contact force into the dynamic model of the stator and an analytical model of the mover. Finally, a bonded-type piezoelectric linear motor with V-shaped stator is investigated as an example for simulations and experiments. The methodology presented here for simulating the transferred load of adhesive layer in bonded-type piezoelectric motor as well as for estimating the vibration characteristics of stator and output performances of motor. It is believed that the proposed method would be helpful to design and manufacture the prototypes due to the wider applicability of allowing for irregular geometry and any bonding conditions.

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A spiral motion piezoelectric micromotor for autofocus and auto zoom in a medical endoscope

Cited by 26 publications

References 17 publications

Review: Recent Advances in Micromotors

Review: Recent Advances in Micromotors

A Digitized Representation of the Modified Prandtl–Ishlinskii Hysteresis Model for Modeling and Compensating Piezoelectric Actuator Hysteresis

Modeling and simulation of bonded-type piezoelectric linear motors considering the stress transfer in adhesive layer

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