带有可旋转外部磁铁的压电式能源收割机的性能估计
1Shanghai Institute of Technology, Shanghai 201418, China.
Chaos (Woodbury, N.Y.)
|December 5, 2024
概括
这项研究分析了带有可旋转磁铁的压电能收获器 (PEH). 对低频振动来说,双位稳定配置更有效,表现出混乱和多位稳定等复杂的动态.
科学领域:
- 非线性动力学是一种非线性动力学.
- 收集能源 收集能源
- 机械工程 机械工程
背景情况:
- 压电式能源收获器 (PEH) 对低功耗电子设备至关重要.
- 了解PEH的动态行为对于优化能量转换效率至关重要.
- 可旋转的外部磁铁提供了一种调整PEH性能的方法.
研究的目的:
- 为了估计带有可旋转外部磁铁的压电式能源收割机 (PEH) 的性能.
- 在不同配置下分析PEH系统的全球动态.
- 为了比较单稳定和双稳定PEH系统的能量收集效率.
主要方法:
- 静态分析用于配置单稳定和双稳定潜力井.
- 多个尺度的方法,用于分析单稳定情况下的周期性反应.
- 扩展平均和梅尔尼科夫方法用于分析可视化案例中的周期和混乱反应.
- 对理论结果进行验证的数值模拟.
主要成果:
- 通过调整磁铁的倾斜角度,可以实现单稳定和双稳定电位井.
- 双门式配置在低频或低水平激发下显示出更高的能量采集效率.
- 丰富的非线性现象,包括多稳定性,混沌和折叠的吸引力盆地,在双稳定的情况下随着兴奋强度的增加而出现.
结论:
- 双稳定潜力井配置为压电能量采集提供了增强的性能,特别是在低激发条件下.
- 同时存在的吸引器和吸引池之间的相互作用决定了输出电压.
- 非线性动态在PEH的操作特征中发挥着重要作用,为性能优化提供了途径.
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