吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (4): 1162-1167.doi: 10.13229/j.cnki.jdxbgxb201504020

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Simulation and experiment of piezoelectric cantilever generator with multi-modal

WU Yue1, YANG Zhi-gang1, CHEN Long1, KANG Xiao-tao2, ZHANG Dong-wei1   

  1. 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China;
    2.College of Communication Engineering, Jilin University, Changchun 130022, China
  • Received:2014-02-24 Online:2015-07-01 Published:2015-07-01

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Abstract: The power generation capacity of piezoelectric cantilever beam generator can not fully play due to that its resonance frequency bandwidth is small when capture low-frequency variation. To overcome this problem, modal analysis of the piezoelectric cantilever beam was carried out. Combining with the requirement of self-power of automobile tire pressure detection system and the characteristics of the vibration mode of the cantilever type power device, a scheme was proposed. In this scheme, the bending and torsion vibration modes were utilized to constitute the piezoelectric cantilever generator; the bending mode and torsion mode were decoupled by the distributed mass block arrangement. Finite element simulation was carried out. The simulation results show that, under the condition that the first bending mode frequency is 12.6 Hz, by adjusting the mass block distribution, the natural frequency of the flexural mode can be reduced to 17.2 Hz. Under the same condition, the power generation capacity of the improved piezoelectric cantilever beam generator is about 1.4 times of that of the traditional centralized mass piezoelectric cantilever beam generator.

Key words: mechanical design, piezoelectric generator, cantilevers, modal analysis, finite element analysis

CLC Number: 

  • TH703
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