Resonant-type piezoelectric inertial drive mechanism with asymmetric inertial masses

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Piezoelectric impact motor (PIM) with high power driving capability has attracted extensive attention. This paper presents a new resonant-type PIM based on inertial drive mechanism. Architecture construction, dynamic modeling, and prototype experiment of the proposed motor are conducted. With sinusoidal driving voltages of 24 V p-p at 435 Hz and 18 V p-p at 870 Hz in the resonant mode, the prototype motor achieves an average no-load velocity of 26.1 mm s −1 , a stalling drag force of 350 mN, and a power output capacity of 2.55 mW, while it also provides a stable step displacement of 0.67 µm with saw-tooth wave driving voltage of 20 V p-p , 10 Hz in the stepping mode. Experiment results are consistent with the theoretical analysis, which confirms an effective approach to guide the structure design and further optimization for resonant-type PIMs.

Section: Performances Of the Prototype Motor In The Resonant Modesupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Construction, modeling and experiment of a resonant-type piezoelectric impact motor based on inertial drive mechanism

Pan

Feng

Shi

et al. 2021

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“…In order to improve the output performance of the motor, researchers use multi-channel harmonic signals to synthesize resonant sawtooth wave waves based on the principle of waveform synthesis. In 2021, Pan et al [30] proposed a resonant piezoelectric motor used synthetic sawtooth wave, with a maximum no-load speed of 17.2 mm s −1 . However, this type of signal needs to be controlled cooperatively by multiple signals, resulting in very complex drive control.…”

Section: Introductionmentioning

confidence: 99%

Research on variable stiffness asymmetrical resonant linear piezoelectric actuator based on multi-modal drive

He,

Yue,

Dou

et al. 2023

In this paper, a linear piezoelectric motor with variable stiffness and asymmetric resonance is proposed, which is driven by a single harmonic signal. Working in the resonant state improve the output performance of the motor. Motor control is relatively simple and can realize reverse movement under the driving of second-order single harmonic signal. At the same time, the new motor can obtain different operating speed and step distance by changing the clamping position in front and back to meet the requirements of different loads and different working conditions and has strong applicability. By experiment, the first-order optimal operating frequency of the motor prototype at three different stiffness adjustment positions is 88 Hz, 90 Hz and 92 Hz respectively. Under the excitation of 240 Vp–p first-order resonance signal, the corresponding output speed of the motor prototype is 16.116 mm s−1, 20.457 mm s−1 and 25.015 mm s−1 respectively, and the corresponding displacement resolution is 0.18 mm, 0.22 mm and 0.27 mm respectively. When the stiffness adjustment positions is 2 mm, the maximum load of the motor prototype reaches 450 g. The second-order optimal operating frequency at the stiffness adjustment positions 1 mm is 601 Hz. Under the excitation of a 240 Vp–p second-order resonant signal, the reverse output speed of the motor prototype is 13.126 mm s−1, and the corresponding displacement resolution is 0.02 mm.

“…In recent years, several new piezoelectric motors have appeared [24][25][26][27][28]. Pan et al [29,30] proposed a new resonant-type piezoelectric impact motor based on inertial drive mechanism. The speed was 26.1 mm s −1 , the resolution was 0.67 µm.…”

Section: Introductionmentioning

confidence: 99%

Development of a high-resolution, high-speed impact piezoelectric actuator using cross-frequency band method

Li¹,

Li²,

Mingfei³

et al. 2022

A novel impact piezoelectric actuator is proposed in this paper to achieve cross-scale driving, which can realise high resolution and high speed. The piezoelectric actuator is mainly composed of four diamond-shaped flexible hinges, which can consider a certain stiffness and flexibility. The operating principle of the piezoelectric actuator is introduced. The actuator is excited by two sinusoidal waves with a frequency ratio of 1:2 to achieve impact drive at quasi static state. The appropriate structural parameters are obtained by simulation. The actuator is designed to make the frequency ratio of first and second vibration modes 1:2, which can achieve impact drive at resonant state. The prototype is fabricated, and the characteristics are tested. The measured resonant frequency ratio is consistent with the simulated value. Experimental results show that when the prototype works at quasi-static state, the resolution is 37 nm with driving voltages of 12 Vp-p; at resonant state, the no-load maximum speed is 125.43 mm/s and the maximum load is 0.5 N when the driving frequency and voltages are 1.95 kHz, 40 Vp-p and 3.90 kHz, 160 Vp-p, respectively. The proposed actuator can be used for precision positioning and can improve the accuracy and the efficiency of processing instruments.