A bionic inertial piezoelectric actuator with improved frequency bandwidth

Xu, Zhi; Yang, Zhixin; Wang, Kuifeng; Li, Xuan; Liu, Yanwei; Dong, Jing; Huang, Hao

doi:10.1016/j.ymssp.2021.107620

Cited by 33 publications

(6 citation statements)

References 41 publications

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“…The stiffness of the elongated foot in the y direction K 2 = F/2∆y can be calculated by Equations ( 7) and ( 9). Equations ( 6), ( 7), ( 9) and (10) show that thickness h, length l, width a, and inclination angle θ affect the output displacement and the stiffness of the clamping mechanism.…”

Section: Physical Analysismentioning

confidence: 99%

A Single-Clamp Inchworm Actuator with Two Piezoelectric Stacks

Liu,

Ji,

Zhang

et al. 2024

Micromachines

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Inchworm piezoelectric actuators have attracted much attention in the field of precision positioning due to the advantages of a large stroke, high output force, and high resolution. However, traditional inchworm piezoelectric actuators use two sets of clamps and a set of drive structures to achieve stepping motion, which generally requires at least three piezoelectric stacks, resulting in a complex structure and the control system. Several methodologies have been advanced to minimize the utilization of piezoelectric stacks. However, there still exists the issue of excessive volume. Therefore, an inchworm piezoelectric actuator with a single-clamp and single drive structure is proposed in the study, which provides a compact size and smaller volume. The clamping mechanism comprises two sets of clamping feet with opposite displacement, which alternate contact with the guide frame and adjustable plate to ensure that the clamping mechanism always has frictional force and accomplishes the stepping motion. The testing of the actuator’s step distance, output force, and other parameters was conducted utilizing a displacement sensor. Experimental results indicate that the actuator achieved a maximum speed of 174.3 μm/s and an output force of 8.6 N when the frequency and voltage were 19 Hz and 150 V.

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Section: Physical Analysismentioning

confidence: 99%

A Single-Clamp Inchworm Actuator with Two Piezoelectric Stacks

Liu,

Ji,

Zhang

et al. 2024

Micromachines

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“…It employs sawtooth wave actuation and can be used for remote, precision-compatible mechanisms. In 2021, Xu et al [32] proposed a bionic inertial piezoelectric actuator with the sawtooth wave. The experimental results showed that it achieved 1D motion with maximum horizontal and vertical loads of 0.6 N and 17 N, respectively.…”

Section: Introductionmentioning

confidence: 99%

The Frequency-Variable Rotor-Blade-Based Two-Degree-of-Freedom Actuation Principle for Linear and Rotary Motion

Li,

Wang,

Peng

et al. 2023

Sensors

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Piezoelectric accurate actuation plays an important role in industrial applications. The intrinsic frequency of previous actuators is invariable. However, variable frequency can approach the range near the low-intrinsic-frequency and realize a high actuation capability. The frequency-variable linear and rotary motion (FVLRM) principle is proposed for rotor-blade-based two-degree-of-freedom driving. Inertial force is generated by frequency-variable piezoelectric oscillators (FVPO), the base frequency and vibration modes of which are adjustable by the changeable mass and position of the mass block. The variable-frequency principle of FVPO and the FVLRM are recognized and verified by the simulations and experiments, respectively. The experiments show that the FVLRM prototype moves the fastest when the mass block is placed at the farthest position and the prototype is at the second-order intrinsic frequencies of 42 Hz and 43 Hz, achieving a linear motion of 3.52 mm/s and a rotary motion of 286.9 mrad/s. The actuator adopts a lower operating frequency of less than 60 Hz and has the function of adjusting the natural frequency. It can achieve linear and rotational motion with a larger working stroke with 140 mm linear movement and 360° rotation.

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“…The quasi-static piezoelectric motor can be subdivided into inchworm piezoelectric motor [12][13][14] and impact piezoelectric motor [15][16][17] according to its working principle. The quasi-static piezoelectric motor uses asymmetric voltage to drive the motor and achieves high-resolution through the cumulative displacement difference of asymmetric vibration.…”

Section: Introductionmentioning

confidence: 99%

Bipedal driven inertial type piezoelectric motor working under quasi-static and resonant states

Qing

Mingfei

Han

et al. 2023

Smart Mater. Struct.

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An inertia piezoelectric motor based on bipedal driven, which can work in not only quasi-static but also resonant states, is proposed, designed, fabricated and studied considering the high resolution of quasi-static piezoelectric motor and the high speed of resonant piezoelectric motor. The two stators of the piezoelectric motor are drived by two sinusoidal electrical signals with 1:2 frequency ratio to generate sinusoidal vibration on the corresponding driving foot. A continuous step motion without frequency limitation is realised under the action of inertia and friction forces after synthesising the sinusoidal vibration of different frequencies into mechanical sawtooth vibration. The natural resonant frequencies of the piezoelectric motor are adjusted to a specific proportion to combine the vibrations in the resonant state through finite element analysis. In the structure of two stators, each stator has a corresponding inertia block, and the corresponding resonant frequency can be altered by adjusting the mass of the inertial block without affecting the other resonant frequency, thus markedly simplifying the design difficulty of the piezoelectric motor which can work in quasi-static and resonant states. The motion characteristics of the prototype are tested by building the prototype and experimental platform. Experimental results show that the maximum speed of the prototype is 29.3 mm/s and the maximum load is 200 g in the resonant state, the minimum displacement resolution of prototype motor is 0.26 μm in the quasi-static state. The motion characteristics of the prototype are consistent with the theoretical analysis, which provides an effective idea to improve the comprehensive performance of the piezoelectric motor.

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A bionic inertial piezoelectric actuator with improved frequency bandwidth

Cited by 33 publications

References 41 publications

A Single-Clamp Inchworm Actuator with Two Piezoelectric Stacks

A Single-Clamp Inchworm Actuator with Two Piezoelectric Stacks

The Frequency-Variable Rotor-Blade-Based Two-Degree-of-Freedom Actuation Principle for Linear and Rotary Motion

Bipedal driven inertial type piezoelectric motor working under quasi-static and resonant states

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