Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (2): 468-471.doi: 10.13229/j.cnki.jdxbgxb20191189

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Mechanism of a linear actuator driven by dual piezoelectric oscillators in inverse mode

Xiao-tao LI1(),Jin-peng REN1,Xiao-xu LI2(),Hang YANG1   

  1. 1.College of Mechanical and Aerospace Engineering，Jilin University，Changchun 130022，China
    2.School of Mechanical and Vehicle Engineering，ChangChun University，Changchun 130022，China
  • Received:2019-12-26 Online:2021-03-01 Published:2021-02-09
  • Contact: Xiao-xu LI E-mail:lixiaotao@jlu.edu.cn;lixiaoxu.fuyu@163.com

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Abstract:

A linear actuator driven by dual piezoelectric oscillators in inverse mode is proposed in order to improve the positioning ability. Two groups of independent controlled piezoelectric oscillators in inverse mode are used as the main and auxiliary piezoelectric oscillators. The oscillators generate the pulling force and thrust force， under which the actuator moves stably in the inclined plane. The bi-directional motion condition of the actuator is obtained. The prototype of the actuator was designed and developed， and the performance test was carried out. The linear actuator driven by dual piezoelectric oscillators in inverse mode outputs large speed and power， and realizes directional and stable motion in a inclined plane with an angle of 10°. The minimum step distance of the actuator is 5 μm， the maximum average speed is 22 mm/s.

Key words: mechanical design, piezoelectric linear actuator, driving mechanism, dynamic characteristics

CLC Number: 

  • TN384

Fig.1

Schematic diagram of a linear actuator driven by dual piezoelectric oscillators in inverse mode"

Fig.2

Driving force analysis diagram of actuator"

Fig.3

Actuator prototype and linear guide rail"

Table 1

Part size of actuator prototype"

部件长L/mm宽W/mm高T/mm材料
梯形块-19-铝
基板80300.4铍青铜
陶瓷层60300.2P-51
惯性质量块1086黄铜

Fig.4

Test system compositions"

Fig.5

Relationship between actuator prototype step and auxiliary piezoelectric oscillator excitation voltage"

Fig.6

Relationship between linear motion velocity and voltage of main piezoelectric oscillator"

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