Abstract
In this paper we present a small self-tunable vibration energy harvester with an integrated electronic circuit board. The changing of the frequency is realized by a stepper motor which moves an anchor. By moving the anchor the effective length of the cantilever beam is changing and as a result the Eigen-frequency changes. The simulations and experimental results are shown for a proof-of-concept and a designed demonstrator in two configurations with a bandwidth of 12 to 30.5 Hz and 19 to 40 Hz. Depending on several factors the possible tuning resolution is between 0.2 and 2 Hz which allows an efficient energy harvesting in the given frequency range.
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