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SDM 2011 Student Papers Competition Electromechanical Modeling of a Multifunctional Energy Harvesting Wing Spar

机译：SDM 2011学生论文竞赛多功能能量收集机翼翼梁的机电建模

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A recent advance in the field of energy harvesting is the development of multifunctional energy harvesting systems. Multifunctional material systems combine several functionalities in a single device in order to increase performance while limiting mass and volume. In energy harvesting systems, multifunctionality can be achieved by combining energy generation capabilities with energy storage ability and/or load bearing ability in a single composite device. An application that can benefit from a multifunctional energy harvesting approach is the powering of remote, low-power sensors on unmanned aerial vehicles (UAVs). The added weight or volume of conventional harvesting designs can hinder the flight performance of UAVs, thus a multifunctional solution where the energy harvesting system can be designed into the aircraft and used as a structural member can provide increased performance over the traditional design. The authors have recently proposed the concept of multifunctional self-charging structures containing piezoelectric layers for energy generation and thin-film battery layers for energy storage. Integration of these multifunctional structures into the wing spar of a UAV presents the ability to not only harvest and store energy, but support structural loading in the wing. In this paper, the electromechanical modeling of a wing spar with embedded energy harvesting and storage ability is investigated. A coupled electromechanical model based on the assumed modes method is developed to predict the vibration response and voltage response of a cantilevered wing spar excited under harmonic base excitation. Experiments are performed on a representative wing spar with embedded self-charging structures and the results are used to verify the electromechanical model. The electrical performance of the representative spar is also investigated by examining the variation of the peak voltage, current, and electrical power with load resistance for the fundamental short-circuit and open-circuit resonant frequencies of the device.
机译：能量收集领域的最新进展是多功能能量收集系统的开发。多功能材料系统在单个设备中结合了多种功能，以提高性能，同时限制质量和体积。在能量收集系统中，可以通过在单个复合设备中将能量产生能力与能量存储能力和/或承载能力相结合来实现多功能。可以从多功能能量收集方法中受益的应用是为无人机上的远程低功率传感器供电。传统收割设计的重量或体积增加会阻碍无人机的飞行性能，因此，一种多功能解决方案可以将能量收集系统设计到飞机中并用作结构构件，从而提供比传统设计更高的性能。作者最近提出了多功能自充电结构的概念，该结构包含用于产生能量的压电层和用于存储能量的薄膜电池层。将这些多功能结构集成到无人机的翼梁中，不仅具有收集和存储能量的能力，而且还支持机翼中的结构载荷。本文研究了具有嵌入式能量收集和存储能力的翼梁的机电模型。建立了基于假定模态方法的耦合机电模型，以预测在谐波基础激励下被激发的悬臂翼梁的振动响应和电压响应。对具有嵌入式自充电结构的代表性翼梁进行了实验，并将结果用于验证机电模型。还通过检查设备的基本短路和开路谐振频率的峰值电压，电流和电功率随负载电阻的变化来研究代表性晶石的电性能。

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