A High-Power-Density Piezoelectric Actuator Operating in Bicycling Movement Mechanism

Li, Zhanmiao; Zhu, Rongqi; Yi, Xingyu; Dong, Shuxiang

doi:10.1109/tie.2022.3190900

Cited by 7 publications

(2 citation statements)

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“…Combining Newton’s second law and elasticity theory [ 27 , 36 , 37 ], the longitudinal vibration displacement along the x -axis ζ = ζ ( x , t ) and the lateral vibration displacement along the z -axis η = η ( x , t ) of the beam can be deduced as:

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Section: Resultsmentioning

confidence: 99%

“…However, there has been a lack of operation mechanism of the symmetrical linear motions, regardless of electromechanical motors or piezoelectric ultrasonic motors. The existing reports mainly take care of the structure, material, and performance improvements of piezomotors on the basis of traditional operation mechanisms [ 25 – 27 ]. Therefore, it is necessary to develop a new driving mechanism to achieve symmetrical high-precision motions with a large movement range of two runners driven by only one miniaturized and integrated piezoelectric stator or actuator.…”

Section: Introductionmentioning

confidence: 99%

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A Symmetric-Actuating Linear Piezoceramic Ultrasonic Motor Capable of Producing a Scissoring Effect

Zhu

et al. 2023

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Conventionally, to produce a linear motion, one motor’s stator is employed to drive one runner moving forward or backward. So far, there is almost no report of one electromechanical motor or piezoelectric ultrasonic motor that can directly generate two symmetrical linear motions, while this function is desired for precise scissoring and grasping in the minimally invasive surgery field. Herein, we report a brand-new symmetric-actuating linear piezoceramic ultrasonic motor capable of generating symmetrical linear motions of two outputs directly without additional mechanical transmission mechanisms. The key component of the motor is an (2 × 3) arrayed piezoceramic bar stator operating in the coupled resonant mode of the first longitudinal ( L 1 ) and third bending ( B 3 ) modes, leading to symmetric elliptical vibration trajectories at its two ends. A pair of microsurgical scissors is used as the end-effector, demonstrating a very promising future for high-precision microsurgical operations. The sliders of the prototype show the following features: (a) symmetrical, fast relative moving velocity (~1 m/s) outward or inward simultaneously; (b) high step resolution (40 nm); and (c) high power density (405.4 mW/cm 3 ) and high efficiency (22.1%) that are double those of typical piezoceramic ultrasonic motors, indicating the full capacity of symmetric-actuating linear piezoceramic ultrasonic motor working in symmetric operation principle. This work also has enlightening significance for future symmetric-actuating device designs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%