| Title |
Vibro-shock dynamics analysis of a tandem low frequency resonator–high frequency piezoelectric energy harvester / |
| Authors |
Žižys, Darius ; Gaidys, Rimvydas ; Ostaševičius, Vytautas ; Narijauskaitė, Birutė |
| DOI |
10.3390/s17050970 |
| Full Text |
|
| Is Part of |
Sensors.. Basel : MDPI. 2017, vol. 17, iss. 5, art. no. 970, p. 1-21.. ISSN 1424-8220 |
| Keywords [eng] |
vibration energy harvesting ; vibro-shock piezoelectrics ; multi-beam dynamics ; frequency up-conversion ; numerical modeling |
| Abstract [eng] |
Frequency up-conversion is a promising technique for energy harvesting in low frequency environments. In this approach, abundantly available environmental motion energy is absorbed by a Low Frequency Resonator (LFR) which transfers it to a high frequency Piezoelectric Vibration Energy Harvester (PVEH) via impact or magnetic coupling. As a result, a decaying alternating output signal is produced, that can later be collected using a battery or be transferred directly to the electric load. The paper reports an impact-coupled frequency up-converting tandem setup with different LFR to PVEH natural frequency ratios and varying contact point location along the length of the harvester. RMS power output of different frequency up-converting tandems with optimal resistive values was found from the transient analysis revealing a strong relation between power output and LFR-PVEH natural frequency ratio as well as impact point location. Simulations revealed that higher power output is obtained from a higher natural frequency ratio between LFR and PVEH, an increase of power output by one order of magnitude for a doubled natural frequency ratio and up to 150% difference in power output from different impact point locations. The theoretical results were experimentally verified. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2017 |
| CC license |
|
