Designoptimization in geometry of seismic mass for MEMS based cantilever type piezoelectric energy harvester for motor vibrations
By: Saxena, Shanky
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Contributor(s): Sharma, Ritu.
Publisher: New Delhi CSIR 2019Edition: Vol.57(5), May.Description: 334-337p.Subject(s): Humanities and Applied ScienceOnline resources: Click here
In:
Indian journal of pure & applied physics (IJPAP)Summary: Piezoelectric energyharvestersaresuitableforvibrationenergyharvestingduetosimpledesign,operationand fabricationinMEMStechnology.Cantilever structures fixed from one end and seismic mass at the other must tune to different resonance frequency to ensure widebandfrequencyoperation.Adequatewidthtolengthratio ofcantileverisrequiredtoavoidcurlingofcantilevers(bending).Effectofincreaseinwidthofthecantilever structureonresonance frequency has beeninvestigatedand alsocomparedanalytically in this paper.Anoptimizeddesignhas beenproposedwhichcompensatesfor theincreaseinresonancefrequencyduetoincreaseinwidthbychangingthegeometryoftheseismicmass.Wi t h t h e c h a n g e i n ge o me t r y o f s e i s mi c ma s s ashiftincenterofmasshas beenachievedtowardsthefreeendofthecantileverwhichreducestheresonancefrequency which is desirable. Thedesign optimization of seismic mass reportedin this paperreducestheresonancefrequencyby4.27% which is appreciated as it is required to harvest ambient vibrations having low frequency.
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School of Engineering & Technology Archieval Section | Not for loan | 2020723 |
Piezoelectric energyharvestersaresuitableforvibrationenergyharvestingduetosimpledesign,operationand fabricationinMEMStechnology.Cantilever structures fixed from one end and seismic mass at the other must tune to different resonance frequency to ensure widebandfrequencyoperation.Adequatewidthtolengthratio ofcantileverisrequiredtoavoidcurlingofcantilevers(bending).Effectofincreaseinwidthofthecantilever structureonresonance frequency has beeninvestigatedand alsocomparedanalytically in this paper.Anoptimizeddesignhas beenproposedwhichcompensatesfor theincreaseinresonancefrequencyduetoincreaseinwidthbychangingthegeometryoftheseismicmass.Wi t h t h e c h a n g e i n ge o me t r y o f s e i s mi c ma s s ashiftincenterofmasshas beenachievedtowardsthefreeendofthecantileverwhichreducestheresonancefrequency which is desirable. Thedesign optimization of seismic mass reportedin this paperreducestheresonancefrequencyby4.27% which is appreciated as it is required to harvest ambient vibrations having low frequency.
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