A piezoelectric power harvester with adjustable frequency through axial preloads

被引：123
作者：
Hu, Yuantai [1 ]
Xue, Huan [1 ]
Hu, Hongping [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Dept Mech, Wuhan 430074, Peoples R China
来源：
SMART MATERIALS AND STRUCTURES | 2007年 / 16卷 / 05期
关键词：
D O I：
10.1088/0964-1726/16/5/054
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We study the technique to adjust the performance of a piezoelectric bimorph vibrating in the flexural mode through axial preloads, which is useful for a power harvester to effectively scavenge energy from ambient mechanical vibrations/noise with varying-frequency spectra. The external circuit connected to the bimorph is simplified as an impedance in the analysis. Analytical solutions are derived. The analyses show that resonance happens when the natural frequency of the bimorph is adjusted adjacent to the external driving frequency by preloading, and the output power density can be raised many more times in that case. The mechanism for an axial preload to improve the bimorph performance at varying-frequency vibrations is examined in detail.
引用
收藏
页码：1961 / 1966
页数：6
相关论文
共 29 条
  • [1] AULD BA, 1973, ACOUSTIC FIELDS WAVE, V1, P357
  • [2] NATURAL FREQUENCIES OF BEAMS UNDER COMPRESSIVE AXIAL LOADS
    BOKAIAN, A
    [J]. JOURNAL OF SOUND AND VIBRATION, 1988, 126 (01) : 49 - 65
  • [3] Chandrakasan A., 1998, P 1998 IEEE INT S CI, P604, DOI DOI 10.1109/ISCAS.1998.699014
  • [4] Five-port equivalent electric circuit of piezoelectric bimorph beam
    Cho, YS
    Pak, YE
    Han, CS
    Ha, SK
    [J]. SENSORS AND ACTUATORS A-PHYSICAL, 2000, 84 (1-2) : 140 - 148
  • [5] A design environment for high throughput, low power dedicated signal processing systems
    Davis, WR
    Zhang, N
    Camera, K
    Chen, F
    Markovic, D
    Chan, N
    Nikolic, B
    Brodersen, RW
    [J]. PROCEEDINGS OF THE IEEE 2001 CUSTOM INTEGRATED CIRCUITS CONFERENCE, 2001, : 545 - 548
  • [6] Design considerations for MEMS-scale piezoelectric mechanical vibration energy harvesters
    duToit, NE
    Wardle, BL
    Kim, SG
    [J]. INTEGRATED FERROELECTRICS, 2005, 71 : 121 - 160
  • [7] Three-port parameters and equivalent circuit of radially polarized piezoelectric ceramic cylinders of finite length
    Ebenezer, DD
    [J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1996, 99 (05) : 2908 - 2912
  • [8] Energy harvesting from vibration using a piezoelectric membrane
    Ericka, M
    Vasic, D
    Costa, F
    Poulin, G
    Tliba, S
    [J]. JOURNAL DE PHYSIQUE IV, 2005, 128 : 187 - 193
  • [9] Analysis of the asymmetric triple-layered piezoelectric bimorph using equivalent circuit models
    Ha, SK
    [J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 2001, 110 (02) : 856 - 864
  • [10] Ha SK, 2001, IEEE T ULTRASON FERR, V48, P976, DOI 10.1109/58.935714
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