发表机构
National Technical University of Athens; University of Thessaly; DASKALOS APPS（雅典国立大学; 色萨利大学; DASKALOS APPS）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究支撑运动对俯仰-沉浮-襟翼翼型压电能量收集的影响，发现软支撑增益多为固定流速假象，按颤振裕量测量时仅沉浮安装有真实增益。
AI 中文摘要
在具有有限质量后缘襟翼的俯仰-沉浮翼型上安装压电换能器，可将颤振后的极限环振荡转化为电能。迄今为止，此类能量收集器的设计结论均基于翼段悬挂系统相对于刚性地面（即风洞安装所提供的固定支撑）的约束条件。本文中，携带换能器的三自由度翼型由可自由平移的机身质量承载，使耦合系统成为自由-自由系统，翼型的沉浮位移相对于移动的支撑进行测量。该支撑自由度本身具有失稳作用，通过与翼型沉浮反相分担部分模态而软化颤振模态，并且其对三个换能器安装位置的影响不均等：放大了沉浮安装位置的失稳效应，对最大的俯仰安装稳定化作用未加改动但将其减半（当电时间常数与颤振频率匹配时），而对襟翼安装位置则无影响。最优耦合系数和负载电阻保持不变，因此刚性支撑翼段的设计匹配规则可直接沿用。在固定流速下，各安装位置收集的功率随支撑质量增加而上升，但研究表明该上升是固定流速设定的人为产物，而非极限环本身的特性。若改为在各自颤振边界以上固定裕量处测量（从而消除边界移动的影响），则沉浮安装位置保持实际增益，而俯仰安装位置功率下降，因此软支撑对俯仰安装收集器的表面益处完全源于颤振边界下移至与流速相遇。因此，在固定流速下引用并解读为极限环特性的收集器结果，其误差等于上述全部差异。
英文摘要
A piezoelectric transducer on a pitch-plunge aerofoil with a finite-mass trailing-edge flap turns the limit cycle that follows flutter into electrical power. The design findings for such a harvester have so far been obtained with the section's suspension reacting against rigid ground, which is what a wind-tunnel mounting provides. Here a 3-dof aerofoil with a transducer is carried by a fuselage mass that is itself free to translate, so that the coupled system is free-free and the wing's plunge is measured relative to a support that moves. The support degree of freedom is destabilising on its own, softening the flutter mode by taking a share of it in antiphase with the wing's plunge, and it acts on the three transducer mountings unequally, amplifying the plunge mounting's destabilisation, leaving the largest pitch-mounted stabilisation untouched while halving it where the electrical time constant meets the flutter frequency, and leaving the flap mounting alone. The optimum coupling and load resistance do not move, so the matching rules of the rigidly supported section carry over unchanged. The harvested power rises with the support mass at a fixed flow speed for every mounting, and that rise is shown to be an artefact of the fixed-speed convention rather than a property of the cycle. Measured instead at a fixed margin above each system's own flutter boundary, which divides out the boundary's motion, the plunge mounting keeps a real gain while the pitch mounting loses power, so the apparent benefit of a soft support to a pitch-mounted harvester is entirely the boundary coming down to meet the flow speed. A harvester result quoted at a fixed speed and read as a property of the limit cycle is therefore wrong by the whole of that difference.
