Development of a two-DOF inertial rotary motor using a piezoelectric actuator constructed on four bimorphs

Zhang, Shijing; Liu, Yingxiang; Deng, Jie; Tian, Xinqi; Gao, Xiang

doi:10.1016/j.ymssp.2020.107213

Cited by 46 publications

(18 citation statements)

References 36 publications

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“…Figure 6a,b illustrate torsional and flexural vibration velocity distributions, respectively.The voltage amplitude and the working frequency was, respectively, 50 V and 4.837 kHz. Here, the driving frequency did not markedly deviate from the resonance frequency measured with the impedance analyzer; this indicates little effect of the fixing mechanism on the vibration properties[29][30][31]. Additionally, the experimental results well agree with the simulated ones; this implies the successful excitation of the first-order torsional and first-order flexural vibrations.…”

supporting

confidence: 66%

“…Here, since we aimed to prove the potential of using torsional and flexural vibrations to achieve high performance, we adopted a simple structure to achieve modal degeneration; this caused fr to be in the audible range. In the future, we will shorten the vibrator to change fr into the inaudible range [18,[26][27][28][29][30]. Table 2 lists the results.…”

Section: Impedance Characteristicsmentioning

confidence: 99%

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A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations

Niu

Liu

et al. 2020

Actuators

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A piezoelectric motor driven by the first-order torsional and first-order flexural (T/F) vibrations is designed, fabricated, and tested in this study. The actuating force is generated by the torsional vibration of the dumbbell-shaped vibrator, while the elliptical motion shape is adjusted with the flexural vibration. The rotor, pressed onto the vibrator’s lateral surface, is frictionally driven with the vibrator. Here, the torsional vibration, the shear modes of piezoelectric ceramics, and the driving method may contribute to high torque and high output power. To test the feasibility of our proposal, first, a prototype of the T/F vibrator is built and its vibration properties are explored. As predicted, the torsional and flexural vibrations are excited on the vibrator. Then, the load characteristics of the piezoelectric motor are investigated. The maximal torque, the no-load rotation speed, and maximal output power are 4.3 Nm, 125 r/min, and 16.9 W, respectively. The results imply that using the first-order torsional and the first-order flexural vibrations is a feasible method to achieve high torque and high output power of piezoelectric motors.

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supporting

confidence: 66%

Section: Impedance Characteristicsmentioning

confidence: 99%

A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations

Niu

Liu

et al. 2020

Actuators

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“…Wang et al introduced a piezoelectric 3-DOF rotary motor [20]. The design of the motor is based on four piezoelectric beams joined in a cross-shaped structure.…”

Section: Introductionmentioning

confidence: 99%

Triangular-Shaped 5-DOF Piezoelectric Robot for Optical Lens Positioning

2022

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The paper represents numerical and experimental investigations on a 5-DOF piezoelectric robot that can provide rotary and planar motions of the payload. The design of the robot is based on a single piezoelectric ring and a triangular-shaped passive layer made from stainless steel. Six semispherical contacts of alumina oxide were used as contact points for rotary and planar motions. Finally, the top electrode of the piezo ceramic ring was divided into six equal segments to control the 3-DOF angular and 2-DOF planar motions of the payload. Two harmonic signals of different frequencies are used to drive the piezoelectric robot. The robot operation is based on the excitation of the third radial vibration mode of the ring and the first bending mode of the trapezoidal-shaped cantilever. Motion control is performed by switching electric signals between the particular segments of the piezoelectric ring. A numerical investigation was performed to validate the operation principle of the robot and to analyze electrical and mechanical characteristics. Numerical investigations showed that the first bending mode of trapezoidal cantilevers and the third radial mode of the piezo ceramic ring were obtained at a frequency of 13.79 kHz and 95.75 kHz, respectively. Moreover, it was revealed that the coupling ratio between vibration amplitudes of passive and active segments is more than 4 times. The prototype of the piezoelectric robot was made and an experimental study was performed to validate the operating principle of the robot, as well as to investigate the dynamic characteristics. The investigation showed that the highest velocity of the planar motion is 22.3 mm/s while the maximum angular motion speed is 29.3 RPM when an excitation voltage of 200 Vp-p and payload of 25.1 g was applied.

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“…The structural design of multi-DOF actuators in most cases is based on simple structures such as piezoelectric rings, cylinders, bimorph plates, or discs that compose one mechanical system and are driven by several electric signals [ 13 ]. Usually, one electrical signal per degree of freedom is needed to drive a multi-DOF actuator; therefore, the driving circuit becomes more sophisticated than a single-DOF actuator [ 14 , 15 ]. Dynamic characteristics of the multi-DOF actuators depend on the design and operating principle.…”

Section: Introductionmentioning

confidence: 99%

Development of a Novel 2-DOF Rotary–Linear Piezoelectric Actuator Operating under Hybrid Bending–Radial Vibration Mode

2021

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The paper presents a numerical and experimental investigation of a novel two degrees of freedom (2-DOF) piezoelectric actuator that can generate rotary motion of the sphere-shaped rotor as well as induce planar motion of the flat stage. The actuator has a small size and simple design and can be integrated into a printed circuit board (PCB). The application field of the actuator is small-dimensional and high-precision positioning systems. The piezoelectric actuator comprises three rectangular bimorph plates joined with arcs and arranged by an angle of 120 degrees. A high-stiffness rod is glued on the top surface of each bimorph plate and is used to rotate the rotor or move flat stage employing contact friction force. Three U-shaped structures are used for the actuator clamping. 2-DOF rotational or planar movement is obtained by applying a harmonic or asymmetric electrical signal. The operation principle of the actuator is based on the superposition of the B20 out-of-plane bending mode of the bimorph plates and the B03 radial vibration mode of the ring. Design optimization has been performed to maximize amplitudes of contact point vibration. A prototype of the actuator was made, and a maximum rotation speed of 795.15 RPM was achieved while preload of 546.03 mN was applied. The linear velocity of 36.45 mm/s was obtained at the same preload force. Resolution measurement showed that the actuator can achieve an angular resolution of 17.48 µrad and a linear resolution of 2.75 µm.

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Development of a two-DOF inertial rotary motor using a piezoelectric actuator constructed on four bimorphs

Cited by 46 publications

References 36 publications

A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations

A Dumbbell Shaped Piezoelectric Motor Driven by the First-Order Torsional and the First-Order Flexural Vibrations

Triangular-Shaped 5-DOF Piezoelectric Robot for Optical Lens Positioning

Development of a Novel 2-DOF Rotary–Linear Piezoelectric Actuator Operating under Hybrid Bending–Radial Vibration Mode

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