@INPROCEEDINGS{Al-Ashtari2013b,
  author = {Waleed Al-Ashtari AND Matthias Hunstig AND Tobias Hemsel AND Walter
	Sextro},
  title = {Characteristics of Piezoelectric Energy Harvesters in Autonomous
	Systems},
  booktitle = {Proceedings of 10th International Workshop on Piezoelectric Materials
	and Applications and 8th Energy Harvesting Workshop, Hannover, Germany,
	14.-17.7.2013},
  year = {2013},
  number = {05/2013},
  series = {Berichte aus dem IDS},
  pages = {159-161},
  address = {Hannover, Germany},
  abstract = {A basic autonomous system powered by a piezoelectric harvester contains
	three components apart from the harvester: a fullwave rectifier,
	a reservoir capacitor and an electronic device performing the primary
	task of the system. In this contribution, a model describing the
	operation of such a system is derived. It is found that in steady-state
	operation, the piezoelectric harvester experiences two alternating
	load conditions due to the rectification process. These alternating
	load conditions can have a significant effect on the operation of
	the harvester and must be considered in the design of autonomous
	systems. The results also show that such an autonomous system works
	efficiently if it is connected to a high impedance load and excited
	by a frequency matching the anti-resonance frequency of the piezoelectric
	harvester.},
  comment = {Preprint: \url{https://groups.uni-paderborn.de/ldm/publications/download/Al-Ashtari2013b.pdf}},
  file = {Al-Ashtari2013b.pdf:Al-Ashtari2013b.pdf:PDF},
  keywords = {Energy harvesting, harvester modeling, load dependence, generated
	voltage},
  timestamp = {2013.09.26}
}