Dynamic analysis of an electrostatic energy harvesting system
Name
863225726-MIT.pdf
Description
Full printable version
Size
11.56 MB
Format
Adobe PDF
Checksum (MD5)
0a5081f0db1424c5b3fc0b0e5d24f439
Author(s)
Niu, Feifei
Advisor(s)
Konstantin Turitsyn.
Alternative Title
Dynamic analysis of a nonlinear electrostatic energy harvesting system
Date Issued
2013
Publisher
Massachusetts Institute of Technology
Abstract
Traditional small-scale vibration energy harvesters have typically low efficiency of energy harvesting from low frequency vibrations. Several recent studies have indicated that introduction of nonlinearity can significantly improve the efficiency of such systems. Motivated by these observations we have studied the nonlinear electrostatic energy harvester using a combination of analytical and numerical approaches. The analytical approach was based on the normal vibration mode analysis around an equilibrium point. The numerical model was implemented and tested using Modelica language. It was found that the efficiency of energy transfer strongly depends on three parameters: the ratio between the maximal electrical and mechanical energies in the system and ratio of natural frequencies of electric and mechanical modes, and finally the dimensionless degree of nonlinearity in the system. The dependence of the transfer factor on these three parameters was studied and characterized both theoretically and numerically. It was found that the transfer factor Tr has a sharply pronounced peak as a function of e providing a possibility of efficient energy conversion between modes with highly different normal frequencies.
Description
Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 97-99).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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