Exact Modeling of Power and Energy Transduction for Optimum Design of Structurally-Integrated Thin-Film Active Sensors

本项目的研究目标是建立用于结构健康监测（SHM）的结构集成薄膜有源传感器中功率和能量传导的基本理解和预测模型。教育目标是在代表性不足的少数民族的参与下解决主动传感器教育和外联问题。在结构集成的薄膜传感器和执行器中，对功率和能量转换进行充分的建模对于节能自主系统的设计至关重要，因为它会影响电池寿命和能量收集需求。该方法将包括快速有效的分析建模、数值模拟和实验验证。重点将是薄膜有源传感器与结构中存在的多模态超声波之间的剪切滞后相互作用的精确分析建模。该方法将首先用于各向同性金属板，然后扩展到一般的多层各向异性系统（例如，粘合剂粘合，复合材料或混合结构）。结果将是一种先进的方法来模拟结构集成薄膜有源传感器中的功率和能量转导。这种方法将允许快速和准确地探索设计空间，以实现自主SHM系统和其他自主有源传感设备长期运行的最佳转导效率。

The research objective of this project is to develop fundamental understanding and predictive modeling of power and energy transduction in structurally integrated thin-film active sensors for autonomous structural health monitoring (SHM). The educational objective is to address active sensors education and outreach with involvement of underrepresented minorities.The adequate modeling of power and energy transduction in structurally integrated thin-film sensors and actuators is of prime importance in the design of energy-efficient autonomous systems because it affects battery life and energy harvesting needs. The approach will consist of fast and efficient analytical modeling, numerical simulation, and experimental validation. The focus will be on exact analytical modeling of the shear-lag interaction between a thin-film active sensor and the multi-modal ultrasonic waves present in the structure. The methodology will be first developed for isotropic metallic plates and then extended to generic multi-layer anisotropic systems (e.g., adhesive bonding, composites, or hybrid structures).The outcome will be an advanced methodology for modeling of power and energy transduction in structurally integrated thin-film active sensors. This methodology will allow rapid and accurate exploration of the design space to achieve optimum transduction efficiency for long-term operation of autonomous SHM systems and other autonomous active sensing devices.