A Linear Piezoelectric Stick-Slip Actuator via Triangular Displacement Amplification Mechanism

Lu, Xiaohui; Gao, Qiang; Li, Yikang; Yu, Yang; Zhang, Xiaosong; Qiao, Guangda; Cheng, Tinghai

doi:10.1109/access.2019.2963680

Cited by 39 publications

(24 citation statements)

References 39 publications

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“…Piezoelectric actuators (PEAs) have the merits of strong electromagnetic compatibility, small size, high control precision, large output force, flexible design, and selflocking, etc. [1][2][3][4]. They are often widely used in precision manufacturing [5][6][7], aerospace, biomedical engineering, and other fields [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Design and Locomotion Study of Stick-Slip Piezoelectric Actuator Using Two-Stage Flexible Hinge Structure

Zhao

et al. 2021

Micromachines

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A novel piezoelectric actuator using a two-stage flexure hinge structure is proposed in this paper, which is used in a compact and high-precision electromechanical field. The two-stage flexure hinge structure is used to provide horizontal thrust and vertical clamping force to the driving feet, which solves the problems of unstable clamping force and insufficient load capacity in traditional stick-slip piezoelectric actuators. Firstly, the main structure of the driver and the working process under the triangular wave excitation voltage are briefly introduced. Secondly, after many simulation tests, the structure of the actuator is optimized and the stability of the structure in providing clamping force is verified. Finally, through the research of the operating performance, when the amplitude is 150 V and the frequency is 3.25 kHz as the excitation source, the maximum speed can reach 338 mm/s and can bear about 3 kg load. It can be seen from the analysis that the two-stage flexure hinge structure can improve the displacement trajectory.

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Section: Introductionmentioning

confidence: 99%

Design and Locomotion Study of Stick-Slip Piezoelectric Actuator Using Two-Stage Flexible Hinge Structure

Zhao

et al. 2021

Micromachines

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“…Piezoelectric wiggle motors are among the world's smallest linear motors, using ultrasonic standing wave vibrations to directly rotate a screw [12]. Various other piezoelectric motors designs, based variously on impact events, traveling waves, or stick-slip behavior, have been developed to drive a free rotor or body [13][14][15][16]. This permits large displacement or even continuous-displacement outputs, but tends to require complex fabrication and provide small load-bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Impact-Based Amplification and Frequency Down-Conversion of Piezoelectric Actuation for Small Robotics

Shen

Luo

et al. 2021

Applied Sciences

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This paper explores a concept for dynamic amplification of piezoelectric actuator motion using repeated impacts between the active transducer and a compliant amplification mechanism. The design shows good performance in amplifying vibration of a lead–zirconate–titanate (PZT) bimorph while down-converting the output frequency of motion from more than 150 Hz to less than 20 Hz. A simple dynamic model is used to identify the conceptual opportunities for impact-based amplification of PZT displacement. Experimental results are gathered from a prototype system with dimensions 55 mm × 22 mm × 1 mm. PZT displacement is amplified by a factor of more than 100 with near-periodic output oscillations at select input frequencies. Implications for leveraging the low-frequency output oscillations in small mobile robots are briefly discussed.

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“…For example, Li et al designed a parallelogram flexure hinge mechanism, an equilateral triangle flexure mechanism, and an asymmetrical trapezoid flexure mechanism, respectively [15][16][17]. Cheng et al proposed a trapezoid-type right circular flexure hinge mechanism, a mechanism with asymmetrical right-circle flexure hinges and a triangular displacement amplification mechanism with asymmetric flexure hinges, respectively [18][19][20]. Guo et al developed a mechanism of asymmetric structure with circular flexure hinges and leaf flexure hinges [21].…”

Section: Introductionmentioning

confidence: 99%

Improving Velocity of Stick-Slip Piezoelectric Actuators With Optimized Flexure Hinges Based on SIMP Method

et al. 2020

Self Cite

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Flexure hinges have been widely applied in driving mechanisms to achieve the high velocity of stick-slip piezoelectric actuators. However, the majority of driving mechanisms are designed with existing flexure hinge forms, and it is difficult for the actuators to realize the optimal velocity performance. Therefore, a systematic method based on the topology optimization to design flexure hinges of driving mechanisms is proposed in this paper for improving the velocity of the actuators. According to the working principle, the velocity can be increased by maximizing displacement of a driving foot along the positive direction of x-axis. The optimization problem of flexure hinges is described utilizing the Solid Isotropic Material with Penalization (SIMP) method. To illustrate the proposed method in detail, a four-bar mechanism with optimized flexure hinges is designed. Among them, three optimization schemes are implemented based on positions of flexure hinge design domains, and then deformations and equivalent stresses of the four-bar mechanism are investigated by simulation to find optimal flexure hinge forms. To prove the feasibility of the proposed method, the characteristic experiments of prototype are conducted. When the driving voltage and driving frequency of prototype are 100 V p-p and 470 Hz, the maximum velocity is 17.50 mm/s, the maximum load is 220 g. And it is interesting to find that the prototype has no backward motion. Compared with the previously reported actuators with four-bar mechanisms, the velocity of prototype is significantly improved. INDEX TERMS stick-slip piezoelectric actuators, flexure hinges, driving mechanisms, SIMP method, velocity performance.

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A Linear Piezoelectric Stick-Slip Actuator via Triangular Displacement Amplification Mechanism

Cited by 39 publications

References 39 publications

Design and Locomotion Study of Stick-Slip Piezoelectric Actuator Using Two-Stage Flexible Hinge Structure

Design and Locomotion Study of Stick-Slip Piezoelectric Actuator Using Two-Stage Flexible Hinge Structure

Impact-Based Amplification and Frequency Down-Conversion of Piezoelectric Actuation for Small Robotics

Improving Velocity of Stick-Slip Piezoelectric Actuators With Optimized Flexure Hinges Based on SIMP Method

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