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A Theory for Energy-Optimized Operation of Self-Adaptive Vibration Energy Harvesting Systems with Passive Frequency Adjustment

Titelangaben

Mösch, Mario ; Fischerauer, Gerhard:
A Theory for Energy-Optimized Operation of Self-Adaptive Vibration Energy Harvesting Systems with Passive Frequency Adjustment.
In: Micromachines. Bd. 10 (Januar 2019) Heft 1 . - 18 S..
ISSN 2072-666X
DOI: https://doi.org/10.3390/mi10010044

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Self-adaptive vibration energy harvesting systems vary their resonance frequency automatically to better exploit changing environmental conditions. The energy required for the adjustment is taken from the energy storage of the harvester module. The energy gained by an adjustment step has to exceed the energy expended on it to justify the adjustment. A smart self-adaptive system takes this into account and operates in a manner that maximizes the energy output. This paper presents a theory for the optimal operation of a vibration energy harvester with a passive resonance-frequency adjustment mechanism (one that only requires energy for the adjustment steps proper, but not during the hold phases between the steps). Several vibration scenarios are considered to derive a general guideline. It is shown that there exist conditions under which a narrowing of the adjustment bandwidth improves the system characteristics. The theory is applied to a self-adaptive energy harvesting system based on electromagnetic transduction with narrowband resonators. It is demonstrated that the novel optimum mode of operation increases the energy output by a factor of 3.6.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Vibration energy harvesting; frequency tuning; electromagnetic; microgenerator; self-adaptive
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Mess- und Regeltechnik > Lehrstuhl Mess- und Regeltechnik - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Profilfelder
Profilfelder > Emerging Fields
Profilfelder > Emerging Fields > Energieforschung und Energietechnologie
Forschungseinrichtungen
Forschungseinrichtungen > Forschungsstellen
Forschungseinrichtungen > Forschungsstellen > ZET - Zentrum für Energietechnik
Graduierteneinrichtungen > TAO-Graduiertenkolleg Energieautarke Gebäude
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 10 Jan 2019 09:58
Letzte Änderung: 28 Feb 2019 11:00
URI: https://eref.uni-bayreuth.de/id/eprint/46875