EFFECTIVE PIEZOELECTRIC ENERGY HARVESTING WITH BANDWIDTH ENHANCEMENT BY ASSYMETRY AUGMENTED SELF-TUNING OF CONJOINED CANTILEVERS
Artikel i vetenskaplig tidskrift, 2018

Vibrational energy harvesting offers a potential power supply for future intelligent wireless sensors. In order to make vibrational energy harvesters more useful, a broad bandwidth is desirable since many vibrations are stochastic in nature. In this paper we use a piezoelectric self-tuning energy harvester to demonstrate the importance of designing for asymmetry in a system of conjoined cantilevers. Asymmetry is achieved by varying the piezoelectric cantilever lengths as well as the proof mass weights. In addition to bandwidth broadening, a self-tuning effect is experimentally demonstrated by a sliding mass. The measurement results confirm previous model predictions.

intelligent wireless sensor

Piezoelectric energy harvesting

self-tuning

Författare

Henrik Staaf

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Anderson David Smith

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Per Lundgren

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Peter Folkow

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Peter Enoksson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

International Journal of Mechanical Sciences

0020-7403 (ISSN)

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Transport

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Kommunikationssystem

Inbäddad systemteknik

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2018-10-16