Vibration energy harvesting from impulsive excitations via a bistable nonlinear attachment
| Autor: | Alexander F. Vakakis, Francesco Romeo, Sandra Chiacchiari, D. Michael McFarland, Lawrence A. Bergman |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Bistability Energy harvesting Applied Mathematics Mechanical Engineering Chaotic 02 engineering and technology Energy harvesting Negative stiffness Bistability 021001 nanoscience & nanotechnology 01 natural sciences Vibration Nonlinear system Mechanics of Materials Control theory 0103 physical sciences Sensitivity (control systems) 0210 nano-technology Energy source Negative stiffness 010301 acoustics Energy (signal processing) |
| Popis: | A vibration-based bistable electromagnetic energy harvester coupled to a directly excited primary system is examined numerically. The primary goal of the study is to investigate the potential benefit of the bistable element for harvesting broadband and low-amplitude vibration energy. The considered system consists of a grounded, weakly damped, linear oscillator (LO) coupled to a light-weight, weakly damped oscillator by means of an element which provides both cubic nonlinear and negative linear stiffness components and electromechanical coupling elements. Single and repeated impulses with varying amplitude applied to the LO are the vibration energy sources considered. A thorough sensitivity analysis of the system's key parameters provides design insights for a bistable nonlinear energy harvesting (BNEH) device able to achieve robust harvesting efficiency. This is achieved through the exploitation of three BNEH main dynamical regimes; namely, periodic cross-well, aperiodic (chaotic) cross-well, and in-well oscillations. |
| Databáze: | OpenAIRE |
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