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首页> 外文会议>AIAA/ASCE/AHS/ASC structures, structural dynamics and materials conference;AIAA SciTech Forum >AERO - ELASTIC/VISCOELASTIC SENSITIVITY ANALYSES OF PIEZOELECTRIC ENERGY HARVESTING Part I: LINEAR ELASTIC RESULTS
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AERO - ELASTIC/VISCOELASTIC SENSITIVITY ANALYSES OF PIEZOELECTRIC ENERGY HARVESTING Part I: LINEAR ELASTIC RESULTS

机译：压电能量采集的气动弹性/粘弹性灵敏度分析第一部分：线性弹性结果

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In the present paper a study is presented for parameter evolution to ascertain the relative importance of PZT's prior to a more expansive optimization study that will be undertaken next. While diverse current and future materials may become more efficient in EMF generation, the elastic and viscoelastic analyses presented here will be the same and identical state variables will remain key players in the electrical harvesting schemes. Analyses are formulated for lifting surface motions consisting of coupled flexible plunging and twisting and rigid body rolls combined with PZT effects. The motivation is to determine potential beneficial energy harvesting or scavenging and possible adverse effects of such extracted energy on flutter, torsional divergence, control reversal velocities and material failures. The governing relations are formulated and solved describing the extraction of energy through piezoelectric (PZT) devices in elastic and viscoelastic wings, a process generally referred to as energy harvesting or scavenging. The process can be used not only to store the recovered energy but also as control device to prevent torsional divergence, fluter. control reversal, material failures, creep buckling, excessive deflections, etc. This can be accomplished by means of combinations of optimal designer viscoelastie, aerodynamic and PZT or magnetic properties. However, the requirements are diametrically opposed as energy harvesting calls for large deflections and hence more power generation, while stability demands small and limited deflections. Illustrative examples are presented and evaluated. The evolution non-optimum elastic states of several principal parameters is studied and graphed in order to obtain an assessment of their relative importance to the harvesting process as prelude to similar viscoelastic studies and their subsequent optimization of maximum harvestable energy without serious aero - piezo - elastic/viscoelastic operational performances degradations.
机译：在本文中，提出了一项针对参数演化的研究，以确定在进行下一步更广泛的优化研究之前，PZT的相对重要性。尽管当前和将来使用的各种材料可能会更有效地产生EMF，但此处介绍的弹性和粘弹性分析将是相同的，并且相同的状态变量将仍然是电收割方案中的关键角色。制定了用于提升表面运动的分析，该分析包括耦合的弹性插入和扭曲以及结合PZT效果的刚体轧辊。其动机是确定潜在的有益能量收集或清除以及此类提取的能量对颤动，扭转发散，控制反向速度和材料故障的可能不利影响。制定并解决了控制关系，描述了通过弹性和粘弹性机翼中的压电（PZT）装置提取能量的过程，该过程通常称为能量收集或清除。该过程不仅可以用于存储回收的能量，还可以用作控制装置，以防止扭转发散，颤动。控制反转，材料故障，蠕变屈曲，过度挠曲等。这可以通过结合最佳设计者粘弹性，空气动力学和PZT或磁性能来实现。然而，由于能量收集要求大的挠度并因此产生更多的功率，因此，这些要求截然相反，而稳定性要求小的且有限的挠度。介绍并评估了说明性示例。研究和绘制了几个主要参数的演化非最佳弹性状态，以评估它们对收获过程的相对重要性，以此作为类似粘弹性研究的序幕，以及随后对最大收获能量的优化，而没有严重的航空压电弹性/粘弹性操作性能下降。

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