A comparison of power output from linear and nonlinear kinetic energy harvesters using real vibration data
A comparison of power output from linear and nonlinear kinetic energy harvesters using real vibration data
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DOI：
10.1088/0964-1726/22/7/075022
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发表时间：
2013-07-01
影响因子：
4.1
通讯作者：
Al-Hashimi, Bashir M.
中科院分区：
文献类型：
--
作者：
Beeby, Stephen P.;Wang, Leran;Al-Hashimi, Bashir M.
振动能量采集器（VEH）的设计高度依赖于预期应用中存在的环境振动的特性。VEH可以是调谐到特定频率的线性谐振系统，也可以是具有非线性操作或Duffing型响应的非线性系统。本文提供了来自一系列应用的详细振动数据，这些数据可通过能量收集网络的在线数据库免费下载。特别是，这项研究表明，仿真是必不可少的设计和选择最合适的振动能量采集器的特定应用。这是说明通过基于C的模拟不同类型的VEH，使用真实的振动数据，从柴油渡轮发动机，热电联产泵，汽油车发动机和直升机。分析表明，当受到白色噪声振动时，双稳态能量采集器仅比具有相同Q因子的线性或Duffing型非线性能量采集器具有更高的输出功率。分析还表明，压电换能机制比电磁换能机制更适合于微电子能量采集器。此外，在大多数情况下，与具有相同Q因子的Duffing型非线性能量采集器相比，线性能量采集器具有更高的输出功率。仅当Duffing型非线性能量采集器在具有多个峰值的振动处被激励并且这些峰值的频率在其带宽内时，Duffing型非线性能量采集器才可以产生比线性能量采集器更多的功率。通过这些新的观察，本文说明了模拟在能量收集系统的设计中的重要性，特别强调需要将真实的振动数据。
The design of vibration energy harvesters (VEHs) is highly dependent upon the characteristics of the environmental vibrations present in the intended application. VEHs can be linear resonant systems tuned to particular frequencies or nonlinear systems with either bistable operation or a Duffing-type response. This paper provides detailed vibration data from a range of applications, which has been made freely available for download through the Energy Harvesting Network's online data repository. In particular, this research shows that simulation is essential in designing and selecting the most suitable vibration energy harvester for particular applications. This is illustrated through C-based simulations of different types of VEHs, using real vibration data from a diesel ferry engine, a combined heat and power pump, a petrol car engine and a helicopter. The analysis shows that a bistable energy harvester only has a higher output power than a linear or Duffing-type nonlinear energy harvester with the same Q-factor when it is subjected to white noise vibration. The analysis also indicates that piezoelectric transduction mechanisms are more suitable for bistable energy harvesters than electromagnetic transduction. Furthermore, the linear energy harvester has a higher output power compared to the Duffing-type nonlinear energy harvester with the same Q factor in most cases. The Duffing-type nonlinear energy harvester can generate more power than the linear energy harvester only when it is excited at vibrations with multiple peaks and the frequencies of these peaks are within its bandwidth. Through these new observations, this paper illustrates the importance of simulation in the design of energy harvesting systems, with particular emphasis on the need to incorporate real vibration data.