Purpose

Energy harvesting has been extensively developed to scavenge energy from mechanical oscillations. Many investigations focus on the resonant issues which can activate large-amplitude responses in the region of the fundamental frequency. Hence, there are many ultra-low slowly changing excitation sources in the actual environment. To adapt to the slowly changing vibrational excitations, in this paper, we explore a novel bursting oscillations to collect energy induced by the low-frequency excitations.

Methods

The slowly changing ambience excitation is proposed by a cosinoidal voltage source, and the nonlinear restoring force is realized using a nonlinear capacitor. A novel harvester of electromechanical device is developed, the electromechanical coupling equations are presented, and the bursting response is observed via numerical integration.

Results

The superiority of the presented bursting energy harvester is contrasted with the resonance and nonresonance frequencies. Based on the method of fast–slow dynamical analysis method, the dynamical mechanism of bursting oscillations is revealed via the transformed phase diagram. Furthermore, the effects of system parameters on the bursting motion are discussed.

中文翻译：

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利用突发振荡改善从缓慢变化的激励中捕获能量

目的

能量收集已被广泛开发用于从机械振荡中获取能量。许多研究集中在共振问题上，这些问题可以激活基频区域内的大振幅响应。因此，实际环境中有很多超低缓变激发源。为了适应缓慢变化的振动激励，在本文中，我们探索了一种新的突发振荡来收集低频激励引起的能量。

方法

缓变环境激励由余弦电压源提出，非线性恢复力由非线性电容器实现。研制了一种新型机电装置收割机，给出了机电耦合方程，并通过数值积分观察了爆裂响应。

结果

所提出的爆发式能量收集器的优越性与共振和非共振频率形成对比。在快慢动力学分析方法的基础上，通过变换后的相图揭示了爆裂振荡的动力学机制。此外，还讨论了系统参数对爆裂运动的影响。