We present and validate a nonlinear aero-electro-mechanical model that describes the response of a scalable self-excited wind energy harvester. Similar to music-playing harmonica that create tones via oscillations of reeds when subjected to air blow, the proposed device uses flow-induced self-excited oscillations of a piezoelectric beam embedded within a cavity to generate electric power. Specifically, when the volumetric flow rate of air past the beam exceeds a certain threshold, the energy pumped into the structure via nonlinear pressure forces offsets the intrinsic damping in the system setting the beam into self-sustained limit-cycle oscillations. The vibratory energy is then converted into electricity through principles of piezoelectricity.
- Design Engineering Division and Computers in Engineering Division
A Nonlinear Electromechanical Model of a Scalable Self-Excited Wind Energy Harvester
Bibo, A, St. Clair, D, Sennakesavababu, VR, Li, G, & Daqaq, MF. "A Nonlinear Electromechanical Model of a Scalable Self-Excited Wind Energy Harvester." Proceedings of the ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 4: 12th International Conference on Advanced Vehicle and Tire Technologies; 4th International Conference on Micro- and Nanosystems. Montreal, Quebec, Canada. August 15–18, 2010. pp. 691-701. ASME. https://doi.org/10.1115/DETC2010-28921
Download citation file: