考虑尺度效应的微振动能量采集器建模

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摘要考虑尺度效应[1]，引入等效杨氏模量以便于对微压电悬臂梁进行有限元建模。搭建了振动特性实验平台,验证了考虑尺度效应的微梁动力学模型准确有效。在此基础上完善了微振动能量采集器的动力学模型，设计并制备了T型Si悬臂梁振动能量采集器。通过实验测试得到采集器的谐振频率、尖端位移和输出电压，与有限元分析结果相比较，改进模型比宏观模型的误差降低了13%，35%和22%。

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	李创业1
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	霍睿1
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	王伟科1
	2
	赵辰3

关键词 ：尺度效应, 能量采集器, 建模, 微压电悬臂梁

Abstract：Young’s modulus changes in micro world with size effect.Considering this, a micro piezoelectric cantilever beam was analyzed by ANSYS.A vibration characteristics experimental platform was established.Considering size effect, the dynamic equation of the micro beam was studied.Results show that it is accurate.The dynamic model of micro vibration energy harvester was improved based on that.A T-type micro vibration energy harvester was designed and fabricated.Resonant frequency, tip displacement and output voltage of the harvester were obtained.Comparing with the macroscopic model of vibration harvester, the improved model reduces errors by 13%，35%, and 22%.

Key words： Size effect Energy harvester Modelling Piezoelectric cantilever beam

收稿日期: 2017-07-07 出版日期: 2019-06-15

引用本文:

李创业1，2，霍睿1,2，王伟科1,2，赵辰3. 考虑尺度效应的微振动能量采集器建模[J]. 振动与冲击, 2019, 38(12): 148-152.
LI Chuangye1,2,HUO Rui1,2,WANG Weike1,2,ZHAO Chen3. Modeling of a micro vibration energy harvester considering size effect. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(12): 148-152.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I12/148

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