A Review on Frequency Tuning Methods for Piezoelectric Energy Harvesting Systems
Journal Article
Ali, Sutrisno W. Ibrahim and Wahied G. . 2012
Publication Online URL:
Magazine \ Newspaper:
Journal of Renewable and Sustainable Energy
Volume Number:
4
Pages:
062703 (2012)
Publication Abstract:
Piezoelectric energy harvesting technologies have received a great attention during
the last decade to design self-powered microelectronic devices such as wireless
sensor nodes. Piezoelectric energy harvester is a resonant system that produces
maximum power output when its resonant frequency matches the ambient vibration
frequency. The deviation from the resonance causes significant decrease in the
power output. There are two possible solutions to compensate the effect of
frequency deviation: widening the operating frequency bandwidth and tuning the
resonant frequency. Tuning the resonant frequency is a more efficient technique for
applications with single time varying dominant frequency. This paper presents a
comprehensive review of frequency tuning methods for piezoelectric energy
harvesting systems. Two categories generally investigated in the literature include
manual and autonomous tuning methods. The recent developments of many tuning
strategies are discussed and summarized.