Design and Simulation of a Tilted Asymmetric Composite Piezoelectric-Energy Harvester
Vibration is a ubiquitous phenomenon in nature.Piezoelectric materials can convert the mechanical en-ergy of external vibrations into electrical energy,providing energy for micro-electromechanical systems,wireless sensor networks,embedded systems,etc.,thereby reducing the device's dependence on battery power.To broaden the working bandwidth of the piezoelectric-energy harvester and improve its energy-harvesting efficiency,this study designs a tilted asymmetric composite piezoelectric-energy harvester,and obtains the natural frequency and modal shapes of each group of the harvester through theoretical analysis.Through finite-element analysis,the correctness of the theoretical derivation is proved,and the influence law of the number of piezoelectric cantilever beams on the piezoelectric-energy harvester in this design is verified.The results show that the tilted asymmetric composite piezo-electric-energy harvester can harvest vibration energy under multiple modes and improve the energy-harvesting effi-ciency.
vibration energy harvestingfinite elementasymmetric compositemultimode
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