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A wind-induced negative damping method to achieve high-energy orbit of a nonlinear vibration energy harvester
Smart Materials and Structures ( IF 4.1 ) Pub Date : 2021-01-21 , DOI: 10.1088/1361-665x/abd962
Chunbo Lan 1 , Guobiao Hu 2 , Yabin Liao 3 , Weiyang Qin 4
Affiliation  

Maintaining high-energy orbit oscillation of a nonlinear vibration energy harvester (VEH) is the key to achieve high-performance, broadband energy harvesting. Conventional orbit-jump strategies, such as mechanical modulation or electrical control methods, need to consume the limited harvested energy and may unfavourably reduce the energy harvesting efficiency. To avoid the undesired energy consumption, we focus on utilizing the overlooked wind energy to assist a nonlinear VEH to attain the preferred high-energy orbit. The novel orbit-jump method proposed in this letter is based on the wind-induced negative damping mechanism and the resultant self-excited behaviour. Both numerical simulation and experimental results validate the feasibility of the proposed method to efficiently trigger the high-energy orbit oscillations of a nonlinear VEH. Moreover, the required wind energy to achieve self-excited oscillation for different excitation frequencies and acceleration levels, is quite stable and can be easily satisfied, which demonstrates good robustness for practical applications.



中文翻译:

一种实现非线性振动能量收集器高能轨道的风致负阻尼方法

维持非线性振动能量收集器(VEH)的高能量轨道振荡是实现高性能宽带能量收集的关键。诸如机械调制或电控制方法之类的常规轨道跳跃策略需要消耗有限的收集能量,并且可能不利地降低能量收集效率。为了避免不必要的能源消耗,我们专注于利用被忽视的风能来帮助非线性VEH获得首选的高能轨道。在这封信中提出的新颖的跳轨道方法是基于风引起的负阻尼机制和由此产生的自激行为。数值模拟和实验结果均验证了该方法有效触发非线性VEH的高能轨道振荡的可行性。而且,

更新日期:2021-01-21
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