Dynamics and performance evaluation of a self-tuning multistable shape memory energy harvester
Dynamics and performance evaluation of a self-tuning multistable shape memory energy harvester
复制标题
自调节多稳态形状记忆能量采集器的动力学和性能评估
DOI：
10.1140/epjp/s13360-021-01579-6
复制
发表时间：
2021
影响因子：
3.4
通讯作者：
Bi Qin-Sheng
中科院分区：
文献类型：
--
作者：
Jiang Wen-An;Ma Xin-Dong;Liu Mao;Han Meng;Chen Li-Qun;Bi Qin-Sheng
多稳态能量收集已经被广泛地发展以从机械振荡中获取能量。因此，目前的多稳态收割机只有一个固定的装置，不能适应不断变化的环境激励。因此，在复杂多变的环境中，它在较宽的外部激励频率范围内不能很好地工作。为了解决这一关键问题，本文开发了一种新型的形状记忆能量采集器，用于收集由频率变化的激励产生的能量，它具有多稳态非线性恢复力的特点。非线性恢复力用温度变化的多项式模型来表示，能适应变化的环境。分析了该收割机的静、动态特性。结果表明，形状记忆能量采集器在不同温度下有三种结构，即单稳态、双稳态和三稳态。这三类收割机的特点是其潜在功能的形式。对所提出的能量采集器在三种不同类型下的捕获性能进行了对比，结果表明双稳态可以显著提高稳态带宽。此外，还讨论了电路参数对扫频电压和功率的影响。
Multistable energy harvesting has been extensively developed to scavenge energy from mechanical oscillations. Hence, the current multistable harvester only has a fixed device which cannot adapt to changing circumstanced incentives. Therefore, it does not operate well under the wide region of external excitations frequencies in variable complex environments. To overcome the vital issue, in this paper we explored a novel energy harvester with shape memory to collect energy induced by the excitation with variational frequency, which possess the characteristic of multistable nonlinear restoring force. The nonlinear restoring force is represented by using a polynomial model with variational temperature, which can adapt to variational circumstance. The static and dynamic behaviors of the harvester are analyzed. It is shown that the shape memory energy harvester has three configurations at different temperatures, namely monostable, bistable and tristable. The three categories of harvesters are characterized by the form of their potential function. The captured performance of the presented energy harvester under three different types is contrasted; the results revealed that bistability can be applied to enhance the steady-state bandwidth considerably. Furthermore, the effect of circuit parameters on the scavenged voltage and power is discussed.