Structural optimization design of V-shape patch type linear ultrasonic motors

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (7) : 213-218.

YANG Mojian,YAO Zhiyuan,LI Xiang,YAN Xiaoxin

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Abstract

Here,an one-end hinged V-shape linear ultrasonic motor was designed to find a stator structure with a better output efficiency and being more suitable for miniaturization.First of all,using a finite element software,the influences of parameters of the stator structure on modal consistency and amplitudes at the driving foot were analyzed.The optimization design for the stator structure was conducted based on the sensitivity analysis of structural parameters.Then,three motors using stators with different angles 45°,60° and 90°,respectively were fabricated,and Tests for mechanical characteristics of the motors were performed.Test results indicated that compared with the original U-shape motor,the modal consistency of the V-shape motor is better,and the output speed and out put force are greatly improved; when the angle is 90°,the excitation voltage is 300 Vpp,and the preload is 40 N,the motor’s no-load speed rises by 66.8% and its load capacity rises by 55%,the maximum no-load speed reaches 784 mm/s,the maximum out put force reaches 14 N,and the thrust weight ratio is 70.The study showed that the integrated design of clamped elements and stator and the one-end hinged clamping mode can simplify the motor structure,and be suitable for the miniaturization of linear ultrasonic motors; when the V-shape stator angle is 90°,the performance of comprehensive output and the stability of the motor are better.

Key words

linear ultrasonic motor

/ optimum structural design / finite element analysis / modal consistency / miniaturization design

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YANG Mojian,YAO Zhiyuan,LI Xiang,YAN Xiaoxin. Structural optimization design of V-shape patch type linear ultrasonic motors[J]. Journal of Vibration and Shock, 2017, 36(7): 213-218

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