TY - GEN
T1 - On the mechanical behaviour in stiffness compensated piezoelectric beams - An experimental investigation towards energy harvesting
AU - van de Wetering, E.
AU - Blad, T. W.A.
AU - van Ostayen, R. A.J.
PY - 2021
Y1 - 2021
N2 - In this work, a piezoelectric beam is stiffness compensated through adding a negative stiffness formed by attracting magnets. The mechanism's purpose is low-frequency energy harvesting. The effect of deformation speed on the beam's stiffness is investigated by force-displacement measurements taken at different speeds and with different load resistors connected. The effect of the load resistance on the beam's stiffness has been found to be strongly dependent on the deformation speed. A load that results in the same stiffness as in a closed circuit at low deformation speed results in a stiffer response at a faster deformation speed. Also, when the beam is brought close to static balance with a certain load resistance connected, alteration of the load resistance has a great influence on the attained stiffness level. Furthermore, memory effects in the hysteresis found in piezoelectric actuators, related between input voltage and displacement, were also confirmed between displacement and force in sensor application.
AB - In this work, a piezoelectric beam is stiffness compensated through adding a negative stiffness formed by attracting magnets. The mechanism's purpose is low-frequency energy harvesting. The effect of deformation speed on the beam's stiffness is investigated by force-displacement measurements taken at different speeds and with different load resistors connected. The effect of the load resistance on the beam's stiffness has been found to be strongly dependent on the deformation speed. A load that results in the same stiffness as in a closed circuit at low deformation speed results in a stiffer response at a faster deformation speed. Also, when the beam is brought close to static balance with a certain load resistance connected, alteration of the load resistance has a great influence on the attained stiffness level. Furthermore, memory effects in the hysteresis found in piezoelectric actuators, related between input voltage and displacement, were also confirmed between displacement and force in sensor application.
UR - http://www.scopus.com/inward/record.url?scp=85119998623&partnerID=8YFLogxK
U2 - 10.1115/DETC2021-68922
DO - 10.1115/DETC2021-68922
M3 - Conference contribution
AN - SCOPUS:85119998623
T3 - Proceedings of the ASME Design Engineering Technical Conference
BT - 33rd Conference on Mechanical Vibration and Sound (VIB)
PB - The American Society of Mechanical Engineers (ASME)
T2 - 33rd Conference on Mechanical Vibration and Sound, VIB 2021, Held as Part of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2021
Y2 - 17 August 2021 through 19 August 2021
ER -