TY - GEN
T1 - Magnetoelastic beam with extended polymer for low frequency vibration energy harvesting
AU - Ibrahim, Alwathiqbellah
AU - Towfighian, Shahrzad
AU - Younis, Mohammad
AU - Su, Quang
N1 - Publisher Copyright:
© 2016 SPIE.
PY - 2016
Y1 - 2016
N2 - Ambient energy in the form of mechanical kinetic energy is mostly considered waste energy. The process of scavenging and storing such energy is known as energy harvesting. Energy harvesting from mechanical vibration is performed using resonant energy harvesters (EH) with two major goals: enhancing the power scavenged at low frequency sources of vibrations, and increasing the efficiency of scavenging energy by increasing the bandwidth near the resonant frequency. Toward such goals, we propose a piezoelectric EH of a composite cantilever beam with a tip magnet facing another magnet at a distance. The composite cantilever consists of a piezoelectric bimorph with an extended polymer material. With the effect of the nonlinearity of the magnetic force, higher amplitude can be achieved because of the generated bi-stability oscillations of the cantilever beam under harmonic excitation. The contribution of the this paper is to demonstrate lowering the achieved resonant frequency down to 17 Hz compared to 100 Hz for the piezoelectric bimorph beam without the extended polymer. Depending on the magnetic distance, the beam responses are divided to mono and bi-stable regions, for which we investigate static and dynamic behaviors. The dynamics of the system and the frequency and voltage responses of the beam are obtained using the shooting method.
AB - Ambient energy in the form of mechanical kinetic energy is mostly considered waste energy. The process of scavenging and storing such energy is known as energy harvesting. Energy harvesting from mechanical vibration is performed using resonant energy harvesters (EH) with two major goals: enhancing the power scavenged at low frequency sources of vibrations, and increasing the efficiency of scavenging energy by increasing the bandwidth near the resonant frequency. Toward such goals, we propose a piezoelectric EH of a composite cantilever beam with a tip magnet facing another magnet at a distance. The composite cantilever consists of a piezoelectric bimorph with an extended polymer material. With the effect of the nonlinearity of the magnetic force, higher amplitude can be achieved because of the generated bi-stability oscillations of the cantilever beam under harmonic excitation. The contribution of the this paper is to demonstrate lowering the achieved resonant frequency down to 17 Hz compared to 100 Hz for the piezoelectric bimorph beam without the extended polymer. Depending on the magnetic distance, the beam responses are divided to mono and bi-stable regions, for which we investigate static and dynamic behaviors. The dynamics of the system and the frequency and voltage responses of the beam are obtained using the shooting method.
KW - Piezoelectric energy harvesting devices
KW - bi-stability
KW - magnetic force
UR - http://www.scopus.com/inward/record.url?scp=84982170082&partnerID=8YFLogxK
U2 - 10.1117/12.2219276
DO - 10.1117/12.2219276
M3 - Conference contribution
AN - SCOPUS:84982170082
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Smart Materials and Nondestructive Evaluation for Energy Systems 2016
A2 - Peters, Kara J.
A2 - Meyendorf, Norbert G.
A2 - Matikas, Theodoros E.
PB - SPIE
T2 - Smart Materials and Nondestructive Evaluation for Energy Systems 2016
Y2 - 21 March 2016 through 23 March 2016
ER -