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A Hybrid Nonlinear Vibration Energy Harvester, Wei Yang, Shahrzad Towfighian
A Hybrid Nonlinear Vibration Energy Harvester, Wei Yang, Shahrzad Towfighian
Mechanical Engineering Faculty Scholarship
Vibration energy harvesting converts mechanical energy from ambient sources to electricity to power remote sensors. Compared to linear resonators that have poor performance away from their natural frequency, nonlinear vibration energy harvesters perform better because they use vibration energy over a broader spectrum. We present a hybrid nonlinear energy harvester that combines bi-stability with internal resonance to increase the frequency bandwidth. A two-fold increase in the frequency bandwidth can be obtained compared to a bi-stable system with fixed magnets. The harvester consists of a piezoelectric cantilever beam carrying a movable magnet facing a fixed magnet. A spring allows the magnet …
Magnetoelastic Beam With Extended Polymer For Low Frequency Vibration Energy Harvesting, Alwathiqbellah Ibrahim, Shahrzad Towfighian, Mohammad I. Younis, Quang Su
Magnetoelastic Beam With Extended Polymer For Low Frequency Vibration Energy Harvesting, Alwathiqbellah Ibrahim, Shahrzad Towfighian, Mohammad I. Younis, Quang Su
Mechanical Engineering Faculty Scholarship
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 …