Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (08): 176-182.doi: 10.13475/j.fzxb.20210506607

• Machinery & Accessories • Previous Articles     Next Articles

Kinematic characteristics of new piezoelectric actuator for yarn gripper in looms

MA Xunming1,2, LI Zhiyi1(), LÜ Guanglei1, CHEN Yongjie1   

  1. 1. School of Mechanical and Electrical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710600, China
    2. Xi'an Key Laboratory of Modern Intelligent Textile Equipment, Xi'an, Shaanxi 710600, China
  • Received:2021-05-25 Revised:2022-04-23 Online:2022-08-15 Published:2022-08-24
  • Contact: LI Zhiyi E-mail:li826850999@126.com

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Abstract:

Aiming at the low response frequency and poor consistency of the traditional electromagnetic yarn grippers, a new design of yarn grippers based on piezoelectric technology was proposed and its piezoelectric actuator was analyzed dynamically. The static parameters of the piezoelectric actuator and the parameters affecting the position shift of the piezoelectric actuator were analyzed, and the optimal holding length was obtained. The dynamic model of cantilever piezoelectric actuator was established and the system was simulated by MatLab. The influence of the numerical changes of each parameter on the dynamic characteristics and stability of the system was analyzed. Finally, an experimental platform was built to test the piezoelectric actuator, and the advance of the piezoelectric actuator was verified. The simulation and experimental results show that when the driving voltage is 150 V, the frequency is 10 Hz, the maximum displacement of the piezoelectric actuator end is 1.49 mm, and the response time of the system reaches the maximum displacement is stable at about 1.6 ms. Compared with the electromagnetic yarn grippers, the dynamic performance of the new piezoelectric actuator has been significantly improved.

Key words: yarn gripper, piezoelectric actuator, kinetic equation, kinematic characteristic, loom

CLC Number: 

  • TH132

Fig.1

Schematic diagram of piezoelectric yarn gripper"

Fig.2

Diagram of piezoelectric plate micro-displacement along axis"

Fig.3

Schematic diagram of cantilever piezoelectric bending plate"

Fig.4

Relationship between non-clamping length and displacement"

Fig.5

Relationship between thickness and displacement of each layer"

Fig.6

Dynamic model of piezoelectric bending plate"

Fig.7

Influence of damping ratio on system"

Fig.8

Influence of equivalent stiffness on system. (a)Original system; (b)Local enlarged view"

Fig.9

Influence of equivalent mass on system. (a) Original system. (b) Local enlarged view"

Fig.10

Pole of zero"

Fig.11

Bode diagram. (a)Phase; (b)Amplitude"

Fig.12

Experimental test platform"

Fig.13

Test results"

Fig.14

Data analysis results"

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