压电传感器:完整的机电模型与参数提取
Michael L Isaf1, Gabriel A Rincón-Mora1
1School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
本研究介绍了一种用于压电传感器 (PT) 的多功能电机模型,增强了能量采集电路设计. 它简化了参数提取,用于准确的SPICE模拟,改善PT集成和性能分析.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 压电传感器 (PT) 对能量收集至关重要,但对其复杂的电机行为进行建模是具有挑战性的.
- 现有的模型通常依赖于关于合,振动或几何学的简化假设,从而限制了它们的适用性.
- 需要一个统一的模型来准确地代表PT在不同的操作条件,并促进电路设计.
研究的目的:
- 开发一个全面的电子机械 (EM) 模型用于压电传感器 (PTs),独立于合假设,振动条件和几何.
- 为了明确建模压电电磁合系数和弹刚度在能量转换中的作用.
- 为参数提取提供简单的实验方法,以便为PT接口电路开发提供SPICE模拟.
主要方法:
- 开发了一个完整的机电模型,将弹刚性纳入域合,并明确模拟压电EM合系数.
- 从电路和能源采集的角度分析模型,检查域合和负载效应.
- 提供了简单的实验方法来提取模型参数,包括合系数.
主要成果:
- 拟议的模型准确地代表了没有限制性假设的PTs,为能源转移提供了更深入的见解.
- 该模型明确分离了合系数,澄清了它在机械电域转换中的作用以及弹刚性的影响.
- 对悬臂式PT的实验验证显示,对各种振动的模拟和测量反应之间的误差不到5-10%.
结论:
- 开发的PT模型为理解和模拟压电装置提供了显著的进步.
- 简化参数提取可以使PTs快速集成到SPICE模拟中,从而加速设计高效的能量采集电路.
- 这种模型使工程师能够更有效地在需要精确的机电能量转换和收获的应用中使用PT.
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