Quantitative Power Flow Characterization of Energy Harvesting Shock Absorbers by Considering Motion Bifurcation
Quantitative Power Flow Characterization of Energy Harvesting Shock Absorbers by Considering Motion Bifurcation
复制标题
DOI：
10.3390/en15196887
复制
发表时间：
2022
期刊：
影响因子：
3.2
通讯作者：
Shengquan Li
中科院分区：
文献类型：
--
作者：
Jing Li;Peiben Wang;Yuewen Gao;Dong Guan;Shengquan Li
Vibration energy harvesting technology can capture ambient energy forms. Using an energy harvesting shock absorber (EHSA) is one of the methods to achieve this function. The EHSA with mechanical motion rectifier (MMR) has motion bifurcation, which can improve energy harvesting performance and reduce the impact between gears. However, the motion bifurcation makes it difficult to quantitatively predict the vibrational energy dissipation and energy harvesting of the MMR−EHSA. Evaluating the performance of an MMR−EHSA during the design phase becomes highly complex. In this paper, a novel nonlinear dynamics model of MMR−EHSAs is established to solve motion bifurcation and quantitative power flow. Furthermore, the proposed MMR−EHSA prototype is fabricated, and dynamics testing is initiated to verify the theoretical model under harmonic vibration. The testing results show that the theoretical model can predict the working characterization of MMR−EHSAs. The resistance of optimal harvesting energy and maximum damping power is revealed by the quantitative power flow model under harmonic vibration. In addition, the working performance under random vibration is discussed. The proposed nonlinear dynamics model has advantages when solving random vibration input and has potential for practical application.
