Shock reliability enhancement for MEMS vibration energy harvesters with nonlinear air damping as a soft stopper

被引：15

作者：

Chen, Shao-Tuan ^{[1
]}

Du, Sijun ^{[1
]}

Arroyo, Emmanuelle ^{[1
]}

Jia, Yu ^{[1
,2
]}

Seshia, Ashwin ^{[1
]}

机构：

[1] Univ Cambridge, Nanosci Ctr, Cambridge CB3 0FF, England

[2] Univ Chester, Dept Mech Engn, Chester CH1 4BJ, Cheshire, England

来源：

JOURNAL OF MICROMECHANICS AND MICROENGINEERING | 2017年 / 27卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

nonlinear damping; shock reliability; soft mechanical stopper; STRENGTH; FRACTURE;

D O I：

10.1088/1361-6439/aa82ed

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a novel application of utilising nonlinear air damping as a soft mechanical stopper to increase the shock reliability for microelectromechanical systems (MEMS) vibration energy harvesters. The theoretical framework for nonlinear air damping is constructed for MEMS vibration energy harvesters operating in different air pressure levels, and characterisation experiments are conducted to establish the relationship between air pressure and nonlinear air damping coefficient for rectangular cantilever MEMS micro cantilevers with different proof masses. Design guidelines on choosing the optimal air pressure level for different MEMS vibration energy harvesters based on the trade-off between harvestable energy and the device robustness are presented, and random excitation experiments are performed to verify the robustness of MEMS vibration energy harvesters with nonlinear air damping as soft stoppers to limit the maximum deflection distance and increase the shock reliability of the device.

引用

页数：13

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